/* =========================================================================
   Rescue Academy — styles.css (single stylesheet, hand-written)
   Brand: navy #1d448a + yellow #f2c035, system font stack, no web fonts
   (CSP default-src 'self'). Structure:
     1. Design tokens (light) + dark theme overrides
     2. Base elements
     3. Icons
     4. Header / navigation
     5. Page shell + sidebar
     6. Buttons, badges, tags
     7. Home page (paths, program cards, library, info cards)
     8. Program page (header, facts, curriculum, lesson index)
     9. Lesson pages (header, module list, body, pager)
    10. Forms, contact, My Class, admin
    11. Footer, 404, utilities
    12. Responsive breakpoints + reduced motion
   ========================================================================= */

/* The hidden attribute always hides, even on components that set display. */
[hidden] {
  display: none !important;
}

/* 1. Design tokens ------------------------------------------------------ */
:root {
  /* Brand */
  --color-primary: #1d448a;
  --color-primary-hover: #163366;
  /* Primary brand blue when used as TEXT (headings, links, outline buttons).
     Same navy in light mode; lightened in the dark theme for contrast. */
  --color-primary-text: #1d448a;
  --color-primary-soft: #e8eef9;
  --color-accent: #f2c035;
  --color-accent-soft: #fef6dc;

  /* Surfaces + text */
  --color-page-bg: #f3f6fb;
  --color-surface: #ffffff;
  --color-surface-alt: #f8fafc;
  --color-dark-bg: #1d2a35;
  --color-code-bg: #f1f4f8;
  --color-text: #111827;
  --color-text-muted: #4b5563;
  --color-border: #e2e8f0;
  --color-border-strong: #cbd5e1;

  /* Status colours (badges, quiz feedback) */
  --color-success-bg: #dcfce7;
  --color-success-text: #166534;
  --color-warning-bg: #fef3c7;
  --color-warning-text: #92400e;
  --color-info-bg: #eff6ff;
  --color-info-text: #1d4ed8;
  --color-neutral-bg: #e5e7eb;
  --color-neutral-text: #1f2937;
  --color-correct: #15803d;
  --color-incorrect: #b91c1c;
  --color-whatsapp: #22c55e;
  --color-whatsapp-hover: #16a34a;
  --color-whatsapp-text: #022c22;

  /* Type scale */
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  --fs-xs: 0.75rem;
  --fs-sm: 0.875rem;
  --fs-md: 0.95rem;
  --fs-lg: 1.125rem;
  --fs-xl: 1.35rem;
  --fs-2xl: clamp(1.5rem, 1.15rem + 1.2vw, 2rem);

  /* Spacing scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-7: 2rem;
  --space-8: 3rem;

  /* Shape + depth */
  --radius-sm: 0.375rem;
  --radius-md: 0.625rem;
  --radius-lg: 0.875rem;
  --radius-pill: 999px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06), 0 1px 3px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.08), 0 2px 4px rgba(15, 23, 42, 0.05);
  --shadow-soft: var(--shadow-md);
  --focus-ring: 0 0 0 3px rgba(242, 192, 53, 0.75);

  --content-max: 1240px;
  --header-h: 60px;
}

/* Dark theme: one switch only. script.js adds body.theme-dark from the saved
   preference, or from prefers-color-scheme when nothing is saved. */
body.theme-dark {
  --color-primary-text: #93c5fd;
  --color-primary-soft: rgba(147, 197, 253, 0.12);
  --color-accent-soft: rgba(242, 192, 53, 0.12);
  --color-page-bg: #0b1621;
  --color-surface: #111827;
  --color-surface-alt: #0f172a;
  --color-code-bg: #0b1220;
  --color-text: #f1f5f9;
  --color-text-muted: #a3aec2;
  --color-border: #263244;
  --color-border-strong: #334155;
  --color-success-bg: rgba(34, 197, 94, 0.16);
  --color-success-text: #86efac;
  --color-warning-bg: rgba(245, 158, 11, 0.16);
  --color-warning-text: #fcd34d;
  --color-info-bg: rgba(59, 130, 246, 0.16);
  --color-info-text: #93c5fd;
  --color-neutral-bg: #1f2937;
  --color-neutral-text: #e5e7eb;
  --color-correct: #4ade80;
  --color-incorrect: #f87171;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 6px 16px rgba(0, 0, 0, 0.35);
}

/* 2. Base --------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

html {
  scroll-padding-top: calc(var(--header-h) + var(--space-4));
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-page-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-tap-highlight-color: rgba(242, 192, 53, 0.3);
  overflow-wrap: break-word;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: var(--color-primary-text);
  text-decoration: none;
}

a:hover,
a:focus-visible {
  text-decoration: underline;
  text-underline-offset: 2px;
}

a:focus-visible,
.theme-toggle:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
summary:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
  border-radius: var(--radius-sm);
}

code,
pre {
  font-family: var(--font-mono);
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0.75rem;
  padding: 0.5rem 1rem;
  background-color: var(--color-accent);
  color: #1f2933;
  z-index: 2000;
  border-radius: var(--radius-sm);
}

.skip-link:focus {
  left: 0.75rem;
}

.eyebrow {
  margin: 0 0 var(--space-1);
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

/* 3. Icons -------------------------------------------------------------- */
.icon {
  width: 1.25rem;
  height: 1.25rem;
  flex-shrink: 0;
  vertical-align: middle;
}

.icon-sm {
  width: 1rem;
  height: 1rem;
}

/* Square tile that frames a program/category icon. One size system:
   sm 32px (lists), default 40px (cards), lg 56px (page headers). */
.icon-tile {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-md);
  background-color: var(--color-primary-soft);
  color: var(--color-primary-text);
}

.icon-tile .icon {
  width: 1.375rem;
  height: 1.375rem;
}

.icon-tile-sm {
  width: 2rem;
  height: 2rem;
  border-radius: var(--radius-sm);
}

.icon-tile-sm .icon {
  width: 1.125rem;
  height: 1.125rem;
}

.icon-tile-lg {
  width: 3.5rem;
  height: 3.5rem;
  border-radius: var(--radius-lg);
}

.icon-tile-lg .icon {
  width: 1.875rem;
  height: 1.875rem;
}

/* 4. Header / navigation -------------------------------------------------- */
.top-nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--color-primary);
  color: #f9fafb;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.06), 0 2px 10px rgba(15, 23, 42, 0.35);
}

.top-nav-inner {
  max-width: var(--content-max);
  min-height: var(--header-h);
  margin: 0 auto;
  padding: 0.5rem 1rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.brand {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 0.6rem;
  line-height: 1;
  color: #f9fafb;
}

.brand:hover,
.brand:focus-visible {
  text-decoration: none;
}

.brand-logo {
  width: 40px;
  height: 40px;
  object-fit: contain;
  background-color: #ffffff;
  padding: 3px;
  border-radius: 0.45rem;
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  line-height: 1.05;
  min-height: 40px;
  justify-content: center;
  align-items: flex-start;
}

.brand-title {
  font-weight: 800;
  letter-spacing: 0.08em;
  font-size: 1rem;
  text-transform: uppercase;
  line-height: 1;
  color: #ffffff;
}

.brand-slogan {
  font-size: 0.78rem;
  color: var(--color-accent);
  line-height: 1.1;
}

.primary-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 0.25rem;
  margin: 0;
  padding: 0;
}

.nav-link {
  display: inline-block;
  color: #e5e7eb;
  font-size: var(--fs-sm);
  font-weight: 500;
  padding: 0.4rem 0.7rem;
  border-radius: var(--radius-pill);
}

.nav-link:hover,
.nav-link:focus-visible {
  background-color: rgba(255, 255, 255, 0.12);
  color: #ffffff;
  text-decoration: none;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  cursor: pointer;
  width: 44px;
  height: 44px;
  padding: 0;
  border-radius: 0.5rem;
  flex-shrink: 0;
}

.nav-toggle:hover,
.nav-toggle:focus-visible {
  background-color: rgba(255, 255, 255, 0.12);
}

.nav-toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  margin: 4px 0;
  background-color: #f9fafb;
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.theme-toggle {
  background: transparent;
  border: 1px solid rgba(249, 250, 251, 0.35);
  border-radius: var(--radius-pill);
  min-height: 36px;
  padding: 0.3rem 0.6rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: #f9fafb;
  flex-shrink: 0;
}

.theme-toggle:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

.theme-toggle-icon {
  width: 1rem;
  height: 1rem;
  transition: opacity 0.15s ease;
}

body.theme-dark .theme-toggle-icon-sun,
body:not(.theme-dark) .theme-toggle-icon-moon {
  opacity: 0.4;
}

body.theme-dark .theme-toggle-icon-moon,
body:not(.theme-dark) .theme-toggle-icon-sun {
  opacity: 1;
}

/* 5. Page shell + sidebar ------------------------------------------------- */
.page-layout {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: var(--space-5) var(--space-4);
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  gap: var(--space-5);
  align-items: flex-start;
}

.sidebar-left {
  background-color: var(--color-dark-bg);
  color: #e5e7eb;
  border-radius: var(--radius-lg);
  padding: var(--space-3) var(--space-2) var(--space-4);
  position: sticky;
  top: calc(var(--header-h) + var(--space-4));
  max-height: calc(100vh - var(--header-h) - 2rem);
  overflow: auto;
  scrollbar-width: thin;
}

.sidebar-section + .sidebar-section {
  margin-top: var(--space-2);
}

.sidebar-heading {
  width: 100%;
  display: flex;
  justify-content: flex-start;
  align-items: center;
  gap: 0.55rem;
  background: none;
  border: none;
  color: #f8fafc;
  font: inherit;
  font-size: var(--fs-sm);
  font-weight: 650;
  padding: 0.45rem 0.55rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-align: left;
  line-height: 1.3;
}

.sidebar-icon {
  width: 1.05rem;
  height: 1.05rem;
  color: var(--color-accent);
}

.sidebar-heading:hover,
.sidebar-heading:focus-visible {
  background-color: rgba(255, 255, 255, 0.07);
}

.sidebar-links {
  list-style: none;
  padding: 0.1rem 0 0.35rem;
  margin: 0 0 0 0.95rem;
  border-left: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-link {
  display: block;
  padding: 0.28rem 0.7rem;
  margin: 0.05rem 0 0.05rem -1px;
  font-size: 0.84rem;
  color: #cbd5e1;
  border-left: 2px solid transparent;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.sidebar-link:hover,
.sidebar-link:focus-visible {
  background-color: rgba(255, 255, 255, 0.07);
  color: #ffffff;
  text-decoration: none;
}

.sidebar-link.is-active {
  border-left-color: var(--color-accent);
  background-color: rgba(242, 192, 53, 0.1);
  color: #ffffff;
  font-weight: 600;
}

.main-area {
  min-width: 0;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6) var(--space-7) var(--space-7);
  box-shadow: var(--shadow-sm);
}

/* 6. Buttons, badges, tags ------------------------------------------------ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  min-height: 44px;
  min-width: 44px;
  padding: 0.5rem 1.05rem;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  cursor: pointer;
  font: inherit;
  font-size: var(--fs-sm);
  font-weight: 600;
  line-height: 1.2;
  text-align: center;
  text-decoration: none;
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.btn:hover,
.btn:focus-visible {
  text-decoration: none;
}

.btn-primary {
  background-color: var(--color-primary);
  color: #f9fafb;
}

.btn-primary:hover {
  background-color: var(--color-primary-hover);
}

body.theme-dark .btn-primary {
  background-color: #2b5bb5;
}

body.theme-dark .btn-primary:hover {
  background-color: #3567c7;
}

.btn-outline {
  background-color: transparent;
  border-color: var(--color-primary-text);
  color: var(--color-primary-text);
}

.btn-outline:hover {
  background-color: var(--color-primary-soft);
}

.btn-whatsapp {
  background-color: var(--color-whatsapp);
  color: var(--color-whatsapp-text);
}

.btn-whatsapp:hover {
  background-color: var(--color-whatsapp-hover);
}

.btn-email {
  background-color: var(--color-primary);
  color: #f9fafb;
}

.btn-email:hover {
  background-color: var(--color-primary-hover);
}

.btn-link {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--color-primary-text);
}

.btn-text {
  background: none;
  border: none;
  color: var(--color-primary-text);
  font: inherit;
  font-size: var(--fs-sm);
  font-weight: 600;
  padding: 0.35rem 0.25rem;
  min-height: 36px;
  cursor: pointer;
}

.btn-text:hover {
  text-decoration: underline;
}

.btn.full-width {
  width: 100%;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  border-radius: var(--radius-pill);
  padding: 0.2rem 0.65rem;
  font-size: var(--fs-xs);
  font-weight: 600;
  line-height: 1.4;
}

.badge-free {
  background-color: var(--color-success-bg);
  color: var(--color-success-text);
}

.badge-paid {
  background-color: var(--color-warning-bg);
  color: var(--color-warning-text);
}

.badge-level {
  background-color: var(--color-neutral-bg);
  color: var(--color-neutral-text);
}

.badge-duration,
.badge-price {
  background-color: var(--color-info-bg);
  color: var(--color-info-text);
}

.tag {
  display: inline-block;
  border-radius: var(--radius-pill);
  padding: 0.1rem 0.55rem;
  background-color: var(--color-info-bg);
  color: var(--color-info-text);
  font-size: 0.72rem;
  font-weight: 500;
}

.tag-level {
  background-color: var(--color-success-bg);
  color: var(--color-success-text);
}

/* 7. Home page ------------------------------------------------------------ */
.page-title {
  margin: 0;
  color: var(--color-primary-text);
  font-size: var(--fs-2xl);
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.page-subtitle {
  margin: var(--space-2) 0 0;
  color: var(--color-text-muted);
  font-size: 1rem;
  max-width: 60ch;
}

.section {
  margin-bottom: var(--space-8);
}

.section-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-end;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--color-border);
}

.home-cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.section-heading {
  margin-bottom: var(--space-4);
}

.section-heading h2 {
  margin: 0;
  font-size: var(--fs-xl);
  line-height: 1.3;
  color: var(--color-primary-text);
}

.section-heading p {
  margin: var(--space-1) 0 0;
  color: var(--color-text-muted);
  font-size: var(--fs-md);
}

.learning-paths {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.path-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-2);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  border-top: 3px solid var(--color-accent);
  padding: var(--space-5);
  background-color: var(--color-surface-alt);
}

.path-card h2 {
  margin: var(--space-1) 0 0;
  color: var(--color-primary-text);
  font-size: var(--fs-lg);
  line-height: 1.3;
}

.path-card p {
  margin: 0;
  font-size: var(--fs-sm);
}

.path-card ul {
  padding-left: 1.1rem;
  margin: 0;
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
}

.path-card .btn-link {
  margin-top: auto;
}

.programs-grid {
  margin-top: var(--space-4);
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-4);
}

.program-card {
  position: relative;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  padding: var(--space-4);
  background-color: var(--color-surface);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.program-card:hover,
.program-card:focus-within {
  border-color: var(--color-primary-text);
  box-shadow: var(--shadow-md);
}

.program-card-head {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.program-card h3 {
  margin: 0;
  font-size: 1rem;
  line-height: 1.3;
}

.program-card-link {
  color: var(--color-primary-text);
}

/* Stretched link: the whole card is the click target for the title link. */
.program-card-link::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
}

.program-card-link:hover,
.program-card-link:focus-visible {
  text-decoration: none;
}

.program-card-link:focus-visible {
  box-shadow: none;
}

.program-card-link:focus-visible::after {
  box-shadow: var(--focus-ring);
}

.program-card p {
  margin: 0;
}

.program-card-desc {
  font-size: var(--fs-sm);
  color: var(--color-text);
}

.program-meta {
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
}

.program-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
}

.program-actions {
  margin-top: auto;
  padding-top: var(--space-2);
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-2);
}

.card-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--color-primary-text);
}

/* Register sits above the stretched link so it stays independently clickable. */
.program-actions .register-trigger {
  position: relative;
  z-index: 1;
}

.section-programs-template .programs-list {
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  overflow: hidden;
}

.program-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-3) var(--space-4);
}

.program-row + .program-row {
  border-top: 1px solid var(--color-border);
}

.program-row-expanded {
  align-items: flex-start;
}

.program-row-main {
  min-width: 0;
  flex: 1;
}

.topics {
  margin-top: var(--space-1);
}

.topics summary {
  cursor: pointer;
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--color-primary-text);
  list-style: none;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.2rem 0.4rem;
  margin-left: -0.4rem;
  border-radius: var(--radius-sm);
}

.topics summary::-webkit-details-marker {
  display: none;
}

.topics summary::before {
  content: "";
  width: 0.45rem;
  height: 0.45rem;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(-45deg);
  transition: transform 0.15s ease;
}

.topics[open] summary::before {
  transform: rotate(45deg);
}

.topics summary:hover,
.topics summary:focus-visible {
  background-color: var(--color-primary-soft);
}

.topics ul {
  margin: 0.3rem 0 0;
  padding-left: 1.1rem;
  color: var(--color-text);
  font-size: var(--fs-sm);
}

.topics li + li {
  margin-top: 0.15rem;
}

.program-row:nth-child(odd) {
  background-color: var(--color-surface-alt);
}

.program-row h3 {
  margin: 0;
  font-size: var(--fs-md);
  color: var(--color-primary-text);
}

.program-row p {
  margin: 0.1rem 0 0;
  font-size: var(--fs-sm);
}

.program-row-meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

.inperson-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
}

.inperson-card {
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  padding: var(--space-5);
  background-color: var(--color-surface-alt);
}

.inperson-card h3 {
  margin: 0 0 var(--space-2);
  font-size: var(--fs-lg);
  color: var(--color-primary-text);
}

.inperson-card ol,
.inperson-card ul {
  margin: 0;
  padding-left: 1.2rem;
  font-size: var(--fs-sm);
}

.inperson-card p {
  font-size: var(--fs-sm);
  margin-bottom: 0;
}

/* 8. Program page --------------------------------------------------------- */
.breadcrumb {
  font-size: var(--fs-xs);
  margin-bottom: var(--space-4);
  color: var(--color-text-muted);
}

.breadcrumb ol {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.breadcrumb li {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.breadcrumb li::after {
  content: "›";
  color: var(--color-border-strong);
}

.breadcrumb li:last-child::after {
  content: none;
}

.breadcrumb [aria-current="page"] {
  color: var(--color-text);
  font-weight: 600;
}

.tutorial-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}

.tutorial-heading {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  min-width: 0;
  flex: 1 1 22rem;
}

.tutorial-title {
  margin: 0;
  color: var(--color-primary-text);
  font-size: var(--fs-2xl);
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.tutorial-subtitle {
  margin: var(--space-2) 0 0;
  color: var(--color-text-muted);
  font-size: var(--fs-md);
  max-width: 62ch;
}

.tutorial-badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  align-items: flex-start;
  flex: 0 1 auto;
}

.page-jump {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border);
}

.page-jump a {
  font-size: var(--fs-sm);
  font-weight: 600;
  padding: 0.3rem 0.8rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  background-color: var(--color-surface-alt);
}

.page-jump a:hover,
.page-jump a:focus-visible {
  border-color: var(--color-primary-text);
  color: var(--color-primary-text);
  text-decoration: none;
}

.program-fact-block {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}

.program-fact {
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  padding: var(--space-4) var(--space-5);
  background-color: var(--color-surface-alt);
  min-width: 0;
}

.program-fact-wide {
  grid-column: 1 / -1;
}

.program-fact > h2 {
  margin: 0 0 var(--space-2);
  font-size: var(--fs-lg);
  line-height: 1.3;
  color: var(--color-primary-text);
}

.program-fact h3 {
  margin: 0 0 0.3rem;
  font-size: var(--fs-md);
  color: var(--color-primary-text);
}

.program-fact p,
.program-fact ul {
  margin: 0;
  font-size: var(--fs-sm);
}

.program-fact ul {
  padding-left: 1.1rem;
}

.program-fact li + li {
  margin-top: 0.2rem;
}

.check-list {
  columns: 2;
  column-gap: var(--space-7);
}

.check-list li {
  break-inside: avoid;
}

.learning-mode-block {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}

.mode-card {
  border-radius: var(--radius-lg);
  padding: var(--space-4) var(--space-5);
  background-color: var(--color-accent-soft);
  border: 1px solid rgba(242, 192, 53, 0.55);
  border-left: 4px solid var(--color-accent);
}

.mode-card h2 {
  margin: 0 0 0.35rem;
  font-size: var(--fs-lg);
  color: var(--color-primary-text);
}

.mode-card p {
  margin: 0;
  font-size: var(--fs-sm);
}

.notice {
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  font-size: var(--fs-sm);
  margin-bottom: var(--space-5);
}

.notice-info {
  background-color: var(--color-info-bg);
  border-left: 4px solid var(--color-primary-text);
  color: var(--color-text);
}

.program-section {
  margin: var(--space-7) 0;
}

.program-section-title {
  margin: 0 0 var(--space-2);
  font-size: var(--fs-xl);
  line-height: 1.3;
  color: var(--color-primary-text);
}

.program-section-lead {
  margin: 0 0 var(--space-4);
  color: var(--color-text-muted);
  font-size: var(--fs-sm);
  max-width: 70ch;
}

/* Lesson preview index (program page → module pages) */
.lesson-index-list {
  list-style: none;
  margin: 0 0 var(--space-4);
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-2);
}

.lesson-index-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  height: 100%;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-surface);
  color: var(--color-text);
  transition: border-color 0.15s ease, background-color 0.15s ease;
}

.lesson-index-link:hover,
.lesson-index-link:focus-visible {
  border-color: var(--color-primary-text);
  background-color: var(--color-primary-soft);
  text-decoration: none;
}

.lesson-index-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background-color: var(--color-primary-soft);
  color: var(--color-primary-text);
  font-weight: 700;
  font-size: var(--fs-sm);
}

.lesson-index-text {
  display: flex;
  flex-direction: column;
  min-width: 0;
  flex: 1;
}

.lesson-index-kicker {
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.lesson-index-title {
  font-size: var(--fs-sm);
  font-weight: 600;
  line-height: 1.35;
}

.lesson-index-arrow {
  color: var(--color-primary-text);
}

/* Curriculum */
.level-nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin: 0 0 var(--space-4);
  padding: 0;
}

.level-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border);
  background-color: var(--color-surface-alt);
  color: var(--color-text);
  font-size: var(--fs-sm);
  font-weight: 600;
}

.level-chip:hover,
.level-chip:focus-visible {
  border-color: var(--color-primary-text);
  text-decoration: none;
}

.level-chip-state {
  font-size: var(--fs-xs);
  font-weight: 500;
  color: var(--color-text-muted);
}

.level-chip.is-available .level-chip-state {
  color: var(--color-success-text);
}

.curriculum-levels {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.curriculum-level {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4) var(--space-5);
  background-color: var(--color-surface);
}

.curriculum-level-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-bottom: var(--space-3);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-border);
}

.curriculum-level-header h3 {
  margin: 0;
  font-size: var(--fs-lg);
  color: var(--color-primary-text);
}

.curriculum-module {
  padding: var(--space-3) 0;
  border-top: 1px dashed var(--color-border);
}

.curriculum-module:first-of-type {
  border-top: none;
  padding-top: 0;
}

.curriculum-module h4 {
  margin: 0 0 0.2rem;
  font-size: var(--fs-md);
}

.curriculum-module-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.curriculum-label {
  margin: var(--space-2) 0 0.1rem;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.curriculum-module ul {
  margin: 0;
  padding-left: 1.1rem;
  font-size: var(--fs-sm);
}

.problem-item {
  padding: var(--space-3) 0;
  border-top: 1px dashed var(--color-border);
}

.problem-item:first-of-type {
  border-top: none;
  padding-top: 0;
}

.problem-item h3 {
  margin: 0 0 0.3rem;
  font-size: var(--fs-md);
  color: var(--color-primary-text);
}

.tools-group + .tools-group {
  margin-top: var(--space-3);
}

.program-fact .tools-group h3 {
  margin: 0 0 0.3rem;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.tools-group ul {
  margin: 0;
  padding-left: 1.1rem;
}

.tool-skills {
  display: block;
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

.enrollment-cta {
  margin-top: var(--space-7);
  padding: var(--space-5);
  border-radius: var(--radius-lg);
  background-color: var(--color-primary-soft);
  border: 1px solid var(--color-border);
}

.enrollment-cta p {
  flex-basis: 100%;
  margin: 0 0 var(--space-1);
  font-weight: 700;
  font-size: var(--fs-lg);
  color: var(--color-primary-text);
}

/* 9. Lesson pages --------------------------------------------------------- */
.lesson-header {
  margin-bottom: var(--space-6);
}

.lesson-program-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--fs-sm);
  font-weight: 600;
  margin-bottom: var(--space-4);
}

.lesson-title {
  margin: 0;
  font-size: var(--fs-2xl);
  line-height: 1.2;
  color: var(--color-primary-text);
  letter-spacing: -0.01em;
}

.lesson-progress {
  margin-top: var(--space-4);
  height: 6px;
  border-radius: var(--radius-pill);
  background-color: var(--color-border);
  overflow: hidden;
  max-width: 28rem;
}

.lesson-progress span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background-color: var(--color-accent);
}

.lesson-layout {
  display: grid;
  grid-template-columns: 15rem minmax(0, 1fr);
  gap: var(--space-7);
  align-items: start;
}

.lesson-toc {
  position: sticky;
  top: calc(var(--header-h) + var(--space-4));
  font-size: var(--fs-sm);
}

.lesson-toc summary {
  cursor: pointer;
  font-weight: 700;
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  padding: var(--space-2) 0;
}

.lesson-toc ol {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 2px solid var(--color-border);
}

.lesson-toc-link {
  display: flex;
  gap: var(--space-2);
  align-items: flex-start;
  padding: 0.4rem 0.6rem;
  margin-left: -2px;
  border-left: 2px solid transparent;
  color: var(--color-text-muted);
  line-height: 1.35;
}

.lesson-toc-link:hover,
.lesson-toc-link:focus-visible {
  color: var(--color-primary-text);
  text-decoration: none;
  background-color: var(--color-surface-alt);
}

.lesson-toc-link[aria-current="page"] {
  border-left-color: var(--color-accent);
  color: var(--color-text);
  font-weight: 600;
  background-color: var(--color-accent-soft);
}

.lesson-toc-num {
  flex-shrink: 0;
  min-width: 1.1rem;
  font-weight: 700;
  color: var(--color-primary-text);
}

.lesson-body {
  max-width: 72ch;
  font-size: 1rem;
}

.lesson-body section > p:first-child {
  margin-top: 0;
}

.lesson-pager {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
  margin-top: var(--space-7);
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-border);
}

.pager-link {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  min-width: 0;
}

.pager-link:hover,
.pager-link:focus-visible {
  border-color: var(--color-primary-text);
  background-color: var(--color-primary-soft);
  text-decoration: none;
}

.pager-next {
  text-align: right;
  align-items: flex-end;
}

.pager-dir {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: var(--fs-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-primary-text);
}

.pager-title {
  font-weight: 600;
  font-size: var(--fs-sm);
  line-height: 1.35;
}

.lesson-cta {
  margin-top: var(--space-6);
  padding: var(--space-5);
  border-radius: var(--radius-lg);
  background-color: var(--color-primary-soft);
}

.lesson-cta h2 {
  margin: 0 0 var(--space-1);
  font-size: var(--fs-lg);
  color: var(--color-primary-text);
}

.lesson-cta p {
  margin: 0;
  font-size: var(--fs-sm);
}

.lesson-note {
  margin: var(--space-5) 0 0;
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
}

/* Lesson body typography (shared by lesson pages) */
.tutorial-body section + section {
  margin-top: var(--space-7);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
}

.tutorial-body h3 {
  color: var(--color-primary-text);
  font-size: var(--fs-xl);
  margin: 0 0 var(--space-2);
}

.tutorial-body h4 {
  color: var(--color-primary-text);
  font-size: var(--fs-lg);
  margin: var(--space-5) 0 var(--space-2);
}

.tutorial-body p {
  margin: 0 0 var(--space-3);
}

.tutorial-body ul,
.tutorial-body ol {
  margin: var(--space-2) 0 var(--space-4);
  padding-left: 1.3rem;
}

.tutorial-body li {
  margin-bottom: 0.3rem;
  line-height: 1.6;
}

.tutorial-body table {
  display: block;
  max-width: 100%;
  overflow-x: auto;
  border-collapse: collapse;
  font-size: var(--fs-sm);
  margin: var(--space-3) 0;
}

.tutorial-body th,
.tutorial-body td {
  border: 1px solid var(--color-border);
  padding: 0.4rem 0.6rem;
  text-align: left;
}

.tutorial-body code {
  background-color: var(--color-code-bg);
  border: 1px solid var(--color-border);
  padding: 0.05rem 0.35rem;
  border-radius: 4px;
  font-size: 0.85em;
}

.tutorial-body pre code {
  background: none;
  border: 0;
  padding: 0;
  font-size: inherit;
}

.note-box {
  margin-top: var(--space-2);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  background-color: var(--color-accent-soft);
  border-left: 4px solid var(--color-accent);
  font-size: var(--fs-sm);
}

pre {
  margin: 0;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  background-color: var(--color-code-bg);
  font-size: 0.84rem;
  line-height: 1.55;
  overflow-x: auto;
  tab-size: 2;
}

.quiz fieldset {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4) var(--space-4);
  margin: 0 0 var(--space-3);
  min-width: 0;
}

.quiz legend {
  font-weight: 600;
  font-size: var(--fs-md);
  padding: 0 0.3rem;
}

.quiz label {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  margin-top: 0.3rem;
  padding: 0.35rem 0.5rem;
  border-radius: var(--radius-sm);
  font-size: var(--fs-sm);
  cursor: pointer;
}

.quiz label:hover {
  background-color: var(--color-surface-alt);
}

.quiz-feedback {
  font-size: var(--fs-sm);
  font-weight: 600;
  margin-top: var(--space-2);
}

.quiz-feedback.is-correct {
  color: var(--color-correct);
}

.quiz-feedback.is-incorrect {
  color: var(--color-incorrect);
}

/* Curriculum syllabus (program page, level pages, module pages) */
.curriculum-level-header h3 a {
  color: inherit;
}

.curriculum-level-facts {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
}

.curriculum-level-open {
  margin-left: auto;
}

.curriculum-hours {
  margin-left: var(--space-2);
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--color-text-muted);
}

.curriculum-desc {
  margin: 0 0 var(--space-1);
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
}

.curriculum-count {
  white-space: nowrap;
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--color-primary-text);
}

.curriculum-project {
  margin: var(--space-3) 0 0;
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-border);
  font-size: var(--fs-sm);
}

.module-main {
  min-width: 0;
  max-width: 72ch;
}

.syllabus-lead {
  margin: 0 0 var(--space-5);
  font-size: 1.05rem;
}

.syllabus-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}

.syllabus-block {
  min-width: 0;
  padding: var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-surface-alt);
  font-size: var(--fs-sm);
}

.syllabus-block h2 {
  margin: 0 0 var(--space-2);
  font-size: var(--fs-md);
  color: var(--color-primary-text);
}

.syllabus-block ul {
  margin: 0;
  padding-left: 1.1rem;
}

.syllabus-block p {
  margin: 0;
}

.syllabus-heading {
  margin: var(--space-6) 0 var(--space-3);
  font-size: var(--fs-lg);
  color: var(--color-primary-text);
}

.lesson-list {
  list-style: none;
  margin: 0 0 var(--space-5);
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.lesson-item {
  padding: var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--fs-sm);
}

.lesson-item h3 {
  margin: 0 0 var(--space-2);
  font-size: var(--fs-md);
  line-height: 1.35;
}

.lesson-item-num {
  display: block;
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.lesson-item p {
  margin: 0 0 var(--space-2);
}

.lesson-item ul {
  margin: 0 0 var(--space-2);
  padding-left: 1.1rem;
}

.lesson-item > :last-child {
  margin-bottom: 0;
}

.activity-card {
  margin-bottom: var(--space-5);
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-lg);
  background-color: var(--color-primary-soft);
  border-left: 4px solid var(--color-primary-text);
}

.activity-card h2 {
  margin: 0 0 var(--space-1);
  font-size: var(--fs-md);
  color: var(--color-primary-text);
}

.activity-card p {
  margin: 0;
  font-size: var(--fs-sm);
}

.project-card {
  margin: var(--space-6) 0;
  padding: var(--space-5);
  border: 1px solid var(--color-border);
  border-top: 3px solid var(--color-accent);
  border-radius: var(--radius-lg);
  background-color: var(--color-surface-alt);
}

.project-card-title {
  margin: 0 0 var(--space-2);
  font-size: var(--fs-lg);
  color: var(--color-primary-text);
}

.project-card > p {
  margin: 0 0 var(--space-4);
  font-size: var(--fs-sm);
}

.project-card .syllabus-grid {
  margin-bottom: 0;
}

.project-card ul {
  margin: 0;
  padding-left: 1.1rem;
  font-size: var(--fs-sm);
}

/* 10. Forms, contact, My Class, admin -------------------------------------- */
.contact-inline {
  margin-top: var(--space-4);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--fs-sm);
}

.section-contact {
  background: linear-gradient(135deg, var(--color-primary), #0b1621);
  color: #f9fafb;
  padding: var(--space-7) var(--space-6) var(--space-7);
  border-radius: var(--radius-lg);
}

.section-contact .section-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.section-contact .section-heading h2 {
  margin: 0;
  color: #ffffff;
}

.section-contact .section-heading p {
  margin: 0.25rem 0 0;
  color: #dbe4f3;
}

.contact-layout {
  margin-top: var(--space-6);
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: var(--space-6);
}

.contact-details h3 {
  margin-top: 0;
}

.contact-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.contact-form {
  background-color: rgba(15, 23, 42, 0.92);
  color: #f9fafb;
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  box-shadow: var(--shadow-md);
}

.contact-form h3 {
  margin-top: 0;
}

.contact-form label {
  display: block;
  margin-top: var(--space-3);
  font-size: var(--fs-sm);
  font-weight: 500;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  min-height: 44px;
  margin-top: 0.2rem;
  border-radius: var(--radius-sm);
  border: 1px solid #4b5563;
  padding: 0.5rem 0.65rem;
  font: inherit;
  font-size: 1rem;
  background-color: #020617;
  color: #f9fafb;
}

.contact-form .btn {
  margin-top: var(--space-4);
}

.contact-form textarea {
  resize: vertical;
}

/* Contact section links on dark background */
.contact-details a {
  color: #ffffff;
  text-decoration: underline;
  font-weight: 500;
}

.contact-details a:hover,
.contact-details a:focus-visible {
  color: var(--color-accent);
}

.contact-form .form-feedback {
  margin-top: 0.5rem;
  font-size: var(--fs-sm);
}

.section-heading h1 {
  margin: 0;
  font-size: var(--fs-2xl);
  color: var(--color-primary-text);
}

.admin-panel {
  max-width: 640px;
}

.admin-login-form {
  max-width: 360px;
}

.admin-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.admin-section {
  border-top: 1px solid var(--color-border);
  padding-top: 1.25rem;
  margin-top: 1.5rem;
}

.admin-section h2 {
  color: var(--color-primary-text);
  font-size: 1.1rem;
  margin: 0 0 0.3rem;
}

.admin-table-wrapper {
  overflow-x: auto;
  margin-top: 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  min-width: 480px;
}

.admin-table th,
.admin-table td {
  text-align: left;
  padding: 0.5rem 0.6rem;
  border-bottom: 1px solid var(--color-border);
  white-space: nowrap;
}

.admin-table td:nth-child(6) {
  white-space: normal;
}

/* Radios and checkboxes inside the dark form panel: never the 44px text-input height. */
.contact-form input[type="radio"],
.contact-form input[type="checkbox"] {
  flex: none;
  width: 1.1rem;
  height: 1.1rem;
  min-height: 0;
  margin: 0.2rem 0 0;
  padding: 0;
  accent-color: var(--color-accent);
}

/* Registration (/register/ and the home page call to action) */
.register-cta ul {
  margin: 0.75rem 0 1rem;
  padding-left: 1.2rem;
  display: grid;
  gap: 0.35rem;
}

.register-cta-note {
  margin-top: 0.75rem;
  font-size: var(--fs-sm);
  color: #cbd5e1;
}

.register-cta-note a {
  color: inherit;
}

.register-page .register-form,
.register-done {
  max-width: 680px;
}

.register-form fieldset {
  border: 0;
  margin: 0;
  padding: 0;
  min-width: 0;
}

.register-form legend {
  font-size: 1.15rem;
  font-weight: 700;
  padding: 0;
  margin-bottom: 0.25rem;
}

.register-form legend:focus {
  outline: none;
}

.register-progress {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.25rem;
  padding: 0;
  margin: 0 0 1rem;
  counter-reset: step;
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
}

.register-progress li {
  counter-increment: step;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.register-progress li::before {
  content: counter(step);
  display: inline-grid;
  place-items: center;
  width: 1.6rem;
  height: 1.6rem;
  border-radius: 50%;
  border: 1px solid var(--color-border-strong);
  font-weight: 700;
}

.register-progress li.is-current {
  color: var(--color-primary-text);
  font-weight: 700;
}

.register-progress li.is-current::before,
.register-progress li.is-done::before {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.register-hint {
  margin: 0.5rem 0 0;
  font-size: var(--fs-sm);
  color: #cbd5e1;
}

.register-choice {
  margin-top: var(--space-3);
}

.register-choice-label {
  margin: 0 0 0.4rem;
  font-size: var(--fs-sm);
  font-weight: 600;
}

.contact-form .register-option,
.register-option {
  display: flex;
  gap: 0.65rem;
  align-items: flex-start;
  margin: 0 0 0.5rem;
  padding: 0.65rem 0.8rem;
  border: 1px solid #4b5563;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.contact-form .register-option {
  margin-top: 0;
}

.register-option:has(input:checked) {
  border-color: var(--color-accent);
  background: rgba(242, 192, 53, 0.08);
}

.register-option > span {
  display: grid;
  gap: 0.15rem;
}

.register-option-detail {
  font-size: var(--fs-sm);
  color: #cbd5e1;
  font-weight: 400;
}

.contact-form .register-consent {
  display: flex;
  gap: 0.6rem;
  align-items: flex-start;
  margin-top: var(--space-4);
  font-weight: 400;
}

.register-hp {
  position: absolute;
  left: -10000px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.register-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.75rem;
  margin-top: var(--space-5);
}

/* Outline buttons sit on the dark form panel here: light outline and text. */
.contact-form .btn-outline {
  color: #f9fafb;
  border-color: #94a3b8;
  background: transparent;
}

.contact-form .btn-outline:hover,
.contact-form .btn-outline:focus-visible {
  border-color: #f9fafb;
  background: rgba(255, 255, 255, 0.08);
}

.register-nav .btn-primary:only-child {
  margin-left: auto;
}

.register-review {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 0.4rem 1rem;
  margin: 0.75rem 0;
}

.register-review dt {
  font-weight: 600;
  color: #cbd5e1;
}

.register-review dd {
  margin: 0;
  overflow-wrap: anywhere;
}

.register-review .btn-text {
  color: var(--color-accent);
}

.register-done {
  padding: var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface-alt);
}

.register-done:focus {
  outline: none;
}

.register-done h2 {
  margin-top: 0;
  color: var(--color-primary-text);
}

.register-done .register-review dt,
.register-done .register-hint {
  color: var(--color-text-muted);
}

.register-reference {
  font-family: ui-monospace, Consolas, monospace;
  font-size: clamp(1.4rem, 5vw, 2rem);
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--color-primary-text);
  margin: 0.25rem 0 0.75rem;
}

@media (max-width: 480px) {
  .register-review {
    grid-template-columns: 1fr;
    gap: 0.1rem;
  }
  .register-review dd {
    margin-bottom: 0.5rem;
  }
}

/* Student dashboard (/my-class/) and enrolment tools (phase 3) */
.student-dashboard {
  max-width: 760px;
}

.student-sessions {
  list-style: none;
  margin: 0.5rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}

.student-session {
  display: grid;
  gap: 0.3rem;
  padding: 0.85rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface-alt);
}

.student-session .btn {
  justify-self: start;
  margin-top: 0.25rem;
}

.student-enrolment {
  padding: 0.85rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-top: 0.75rem;
  display: grid;
  gap: 0.5rem;
}

.student-enrolment h3 {
  margin: 0;
  font-size: 1.05rem;
  color: var(--color-primary-text);
}

.student-password {
  margin-top: 1rem;
}

.student-password summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--color-primary-text);
}

.student-password form {
  margin-top: 0.75rem;
  max-width: 420px;
}

.admin-hint-plain {
  margin: 0.5rem 0 0;
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
}

/* Amount + currency/type side by side: labels on the first row, fields below. */
.admin-fee-row {
  display: grid;
  grid-auto-flow: column;
  grid-template-rows: auto auto;
  grid-template-columns: 1fr minmax(7rem, 11rem);
  gap: 0.35rem 0.75rem;
}

.admin-open-enrolment {
  margin-top: 1rem;
  padding-top: 0.75rem;
  border-top: 1px dashed var(--color-border);
}

.admin-open-enrolment label {
  font-weight: 400;
}

/* Payments (phase 4) */
.is-voided,
.is-voided td {
  color: var(--color-text-muted);
  text-decoration: line-through;
}

.admin-balance dd:first-of-type {
  font-weight: 700;
}

#ledger-payments td:nth-child(4),
#payments-table td:nth-child(5),
#ledger-payments td:nth-child(6),
#payments-table td:nth-child(7),
#payments-table td:nth-child(8),
#ledger-payments td:nth-child(7) {
  white-space: normal;
}

#ledger-payments td,
#payments-table td {
  overflow-wrap: anywhere;
}

.admin-actions .btn-text,
.admin-actions .admin-roles {
  white-space: nowrap;
  overflow-wrap: normal;
}

.student-payments-wrap summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--color-primary-text);
}

.student-payments {
  list-style: none;
  margin: 0.5rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.4rem;
  font-size: var(--fs-sm);
}

.student-payments li {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.25rem 1rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--color-border);
}

/* Dashboard cards, classes, announcements (phase 5) */
.admin-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
  gap: 0.75rem;
  margin: 0.75rem 0;
}

.admin-card {
  display: grid;
  gap: 0.15rem;
  padding: 0.8rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface-alt);
}

.admin-card-value {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-primary-text);
  overflow-wrap: anywhere;
}

.admin-card-label {
  font-weight: 600;
  font-size: var(--fs-sm);
}

.admin-card-note {
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

#classes-table td:nth-child(2),
#classes-table td:nth-child(5),
#ann-table td:nth-child(3),
#report-table td {
  white-space: normal;
}

.student-announcements {
  list-style: none;
  margin: 0.5rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}

.student-announcement {
  display: grid;
  gap: 0.2rem;
  padding: 0.8rem 1rem;
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius-sm);
  background: var(--color-accent-soft);
}

.student-announcement p {
  margin: 0.2rem 0 0;
  white-space: pre-wrap;
}

.student-announcement-meta {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
}

#student-classes {
  margin-top: 0.75rem;
}

/* Staff accounts, audit log and account activation (phase 1) */
.admin-detail {
  margin-top: 1rem;
  padding: 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-surface-alt);
}

.admin-detail:focus {
  outline: 2px solid var(--color-primary);
}

.admin-detail h3 {
  margin: 0 0 0.5rem;
  color: var(--color-primary-text);
}

.admin-detail h4 {
  margin: 1rem 0 0.4rem;
}

.admin-detail-list {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 0.3rem 1rem;
  margin: 0;
}

.admin-detail-list dt {
  font-weight: 600;
  color: var(--color-text-muted);
}

.admin-detail-list dd {
  margin: 0;
  overflow-wrap: anywhere;
  white-space: pre-wrap;
}

.admin-timeline {
  margin: 0;
  padding-left: 1.2rem;
  display: grid;
  gap: 0.35rem;
  font-size: var(--fs-sm);
}

.admin-inline-form {
  display: grid;
  gap: 0.35rem;
  margin-top: 0.9rem;
}

.admin-inline-form input:not([type="checkbox"]):not([type="radio"]),
.admin-inline-form select,
.admin-inline-form textarea {
  width: 100%;
  min-height: 40px;
  padding: 0.45rem 0.6rem;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  font: inherit;
  background: var(--color-surface);
  color: var(--color-text);
}

.admin-inline-form .btn {
  justify-self: start;
}

.admin-inline-check {
  display: inline-flex;
  gap: 0.35rem;
  align-items: center;
}

.admin-inline-check input[type="checkbox"] {
  width: 1.05rem;
  height: 1.05rem;
  min-height: 0;
  flex: none;
}

.admin-flag {
  display: inline-block;
  padding: 0 0.4rem;
  border-radius: 999px;
  background: var(--color-accent-soft);
  color: var(--color-text);
  font-size: 0.75rem;
  font-weight: 600;
}

#applications-table td:nth-child(5),
#programmes-table td:nth-child(4) {
  white-space: normal;
}

@media (max-width: 480px) {
  .admin-detail-list {
    grid-template-columns: 1fr;
  }
}

.admin-hint {
  margin-top: 0.75rem;
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
}

/* The form panel is dark in both themes, so hints use a light tone there. */
.contact-form .admin-hint {
  color: #cbd5e1;
}

.admin-toolbar .btn {
  white-space: nowrap;
  flex: none;
}

.admin-roles {
  color: var(--color-text-muted);
  font-size: var(--fs-sm);
}

.admin-roles-field {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0.5rem 0.75rem 0.75rem;
  display: grid;
  gap: 0.4rem;
}

.admin-roles-field label {
  display: flex;
  gap: 0.5rem;
  align-items: flex-start;
  font-weight: 400;
}

.contact-form .admin-roles-field input[type="checkbox"] {
  flex: none;
  width: 1.1rem;
  height: 1.1rem;
  min-height: 0;
  margin: 0.15rem 0 0;
  padding: 0;
}

.contact-form .admin-roles-field label {
  margin-top: 0;
}

.admin-link-panel {
  display: grid;
  gap: 0.5rem;
  margin-top: 1rem;
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-surface-alt);
}

.admin-link-panel input {
  width: 100%;
  font-family: ui-monospace, Consolas, monospace;
  font-size: var(--fs-sm);
}

.admin-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  margin-top: 0.75rem;
}

.admin-actions {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0.25rem 0.75rem;
}

#users-table td:nth-child(6),
#audit-table td:nth-child(5) {
  white-space: normal;
}

#audit-table td:nth-child(5) {
  font-family: ui-monospace, Consolas, monospace;
  font-size: 0.78rem;
  word-break: break-word;
}

.form-feedback.is-success {
  color: var(--color-success-text);
}

.contact-form .form-feedback.is-success {
  color: #86efac;
}

.my-class-result {
  margin-top: 1.5rem;
  padding: 1rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background-color: var(--color-surface-alt);
}

.my-class-details {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 0.3rem 1rem;
  margin: 0 0 0.75rem;
}

.my-class-details dt {
  font-weight: 600;
  color: var(--color-text-muted);
}

.my-class-details dd {
  margin: 0;
}

.section-my-class .notice,
.section-admin .notice {
  margin-top: var(--space-5);
}

/* 11. Footer, 404, utilities ------------------------------------------------ */
.site-footer {
  background-color: var(--color-primary);
  color: #e5e7eb;
  padding: var(--space-7) var(--space-4) var(--space-5);
  margin-top: var(--space-4);
}

body.theme-dark .site-footer {
  background-color: #0f2a57;
}

.footer-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: var(--space-6);
}

.footer-column h2 {
  margin-top: 0;
  margin-bottom: 1em; /* h2 since the footer heading fix; keeps the old h3 spacing */
  font-size: var(--fs-sm);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-accent);
}

.footer-column p {
  font-size: var(--fs-sm);
  margin: 0;
}

.footer-column ul {
  list-style: none;
  margin: 0.3rem 0 0;
  padding: 0;
  font-size: var(--fs-sm);
}

.footer-column li + li {
  margin-top: 0.35rem;
}

.footer-column a {
  color: #f9fafb;
}

.footer-column a:hover,
.footer-column a:focus-visible {
  color: var(--color-accent);
}

.footer-social {
  margin-top: var(--space-3);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  font-size: var(--fs-sm);
}

.footer-bottom a {
  color: #f9fafb;
  text-decoration: underline;
}

.footer-bottom a:hover,
.footer-bottom a:focus-visible {
  color: var(--color-accent);
}

.footer-bottom {
  max-width: var(--content-max);
  margin: var(--space-6) auto 0;
  padding-top: var(--space-3);
  border-top: 1px solid rgba(226, 232, 240, 0.25);
  font-size: 0.8rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.footer-bottom p {
  margin: 0;
}

.made-in-badge {
  background-color: var(--color-accent);
  color: #111827;
  padding: 0.15rem 0.6rem;
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: 0.78rem;
}

.not-found .home-cta-group {
  margin: var(--space-5) 0;
}

.not-found-links {
  margin: 0;
  padding-left: 1.2rem;
  font-size: var(--fs-sm);
}

.not-found-links li + li {
  margin-top: var(--space-1);
}

.visually-hidden {
  position: absolute !important;
  height: 1px;
  width: 1px;
  overflow: hidden;
  clip: rect(1px, 1px, 1px, 1px);
  white-space: nowrap;
}

/* 12. Responsive ------------------------------------------------------------ */
@media (max-width: 1180px) {
  .programs-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .learning-paths {
    grid-template-columns: minmax(0, 1fr);
  }

  .lesson-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-4);
  }

  .lesson-toc {
    position: static;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 0 var(--space-3) var(--space-2);
    background-color: var(--color-surface-alt);
  }

  .lesson-body,
  .module-main {
    max-width: none;
  }
}

@media (max-width: 640px) {
  .syllabus-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .curriculum-level-open {
    margin-left: 0;
  }
}

@media (max-width: 1024px) {
  .page-layout {
    grid-template-columns: 220px minmax(0, 1fr);
  }

  .main-area {
    padding: var(--space-5);
  }

  .footer-inner {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .contact-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .lesson-index-list {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 900px) {
  .inperson-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .check-list {
    columns: 1;
  }
}

@media (max-width: 768px) {
  .top-nav-inner {
    align-items: center;
    flex-wrap: nowrap;
  }

  .primary-nav {
    order: 3;
    width: auto;
    position: static;
  }

  .theme-toggle {
    order: 2;
    margin-left: auto;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0.2rem;
    margin: 0;
    padding: 0.6rem;
    background-color: var(--color-primary);
    box-shadow: 0 14px 24px rgba(15, 23, 42, 0.45);
    border-top: 1px solid rgba(249, 250, 251, 0.15);
    max-height: calc(100vh - 64px);
    overflow-y: auto;
  }

  .nav-links.is-open {
    display: flex;
  }

  .nav-link {
    display: block;
    padding: 0.85rem 1rem;
    border-radius: 0.5rem;
    font-size: 1rem;
  }

  .nav-link:hover,
  .nav-link:focus-visible,
  .nav-link:active {
    background-color: rgba(249, 250, 251, 0.14);
    color: #ffffff;
  }

  .page-layout {
    grid-template-columns: minmax(0, 1fr);
    padding: var(--space-3);
    gap: var(--space-3);
  }

  .sidebar-left {
    order: 2;
    position: static;
    max-height: none;
  }

  .main-area {
    order: 1;
    padding: var(--space-5) var(--space-4);
  }

  .programs-grid,
  .program-fact-block,
  .learning-mode-block {
    grid-template-columns: minmax(0, 1fr);
  }

  .section-contact {
    padding: var(--space-6) var(--space-4);
  }

  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
  }

  .lesson-pager {
    grid-template-columns: minmax(0, 1fr);
  }

  .pager-next {
    order: -1;
  }
}

@media (max-width: 480px) {
  .top-nav-inner {
    padding-inline: 0.75rem;
    gap: 0.5rem;
  }

  .brand-title {
    font-size: 0.88rem;
  }

  .brand-slogan {
    font-size: 0.72rem;
  }

  .page-layout {
    padding: var(--space-2);
  }

  .main-area {
    padding: var(--space-4) var(--space-3);
    border-radius: var(--radius-md);
  }

  .home-cta-group {
    flex-direction: column;
    align-items: stretch;
  }

  .program-row {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
  }

  .tutorial-heading {
    gap: var(--space-3);
  }

  .icon-tile-lg {
    width: 2.75rem;
    height: 2.75rem;
  }

  .icon-tile-lg .icon {
    width: 1.5rem;
    height: 1.5rem;
  }

  .tutorial-body pre {
    font-size: 0.76rem;
    padding: var(--space-2) var(--space-3);
  }

  .enrollment-cta .btn,
  .lesson-cta .btn {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ======================================================================
   Visual example system (scripts/example-render.js) and the lesson,
   free-library and internship-specialization pages. Built on the tokens
   above; works in light and dark themes and down to 360px.
   ====================================================================== */
:root {
  --ex-s0: #1d448a;
  --ex-s1: #d9a514;
  --ex-s2: #15803d;
  --ex-bad: #b91c1c;
  --code-bg: #0f1b2d;
  --code-bar: #16243a;
  --code-text: #e2e8f0;
}
body.theme-dark {
  --ex-s0: #60a5fa;
  --ex-s1: #f2c035;
  --ex-s2: #4ade80;
  --ex-bad: #f87171;
  --code-bg: #0a1322;
  --code-bar: #111d31;
}

.example {
  margin: var(--space-6) 0;
  padding: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background-color: var(--color-surface);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}
.example-head {
  padding: var(--space-4) var(--space-5) var(--space-3);
  border-bottom: 1px solid var(--color-border);
  background: linear-gradient(135deg, var(--color-primary-soft), transparent 70%);
}
.example-type {
  display: inline-block;
  padding: 0.15rem 0.6rem;
  border-radius: var(--radius-pill);
  background-color: var(--color-accent-soft);
  color: var(--color-text);
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}
.example-title {
  margin: var(--space-2) 0 var(--space-1);
  font-size: var(--fs-lg);
  line-height: 1.3;
}
.example-summary {
  margin: 0;
  color: var(--color-text-muted);
  font-size: var(--fs-sm);
}
.example-body {
  padding: var(--space-4) var(--space-5) var(--space-5);
  display: grid;
  gap: var(--space-4);
  min-width: 0;
}
.example-body > * {
  min-width: 0;
}
.example-label {
  margin: 0 0 var(--space-2);
  font-size: var(--fs-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-primary-text);
}
.example-block p {
  margin: 0 0 var(--space-2);
  font-size: var(--fs-sm);
}
.example-block ul,
.example-block ol {
  margin: 0;
  padding-left: 1.2rem;
  font-size: var(--fs-sm);
}
.example-block li + li {
  margin-top: var(--space-1);
}
.example-notes {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 240px), 1fr));
}
.example-result {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  background-color: var(--color-success-bg);
}
.example-result .example-label {
  color: var(--color-success-text);
}
.example-data summary {
  cursor: pointer;
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--color-primary-text);
}

/* Inline (free-course) code examples */
.example-inline {
  margin: var(--space-4) 0;
}
.example-inline .example-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
}
.example-inline-title {
  font-weight: 600;
  font-size: var(--fs-sm);
}
.example-inline .code-window {
  border-radius: 0;
  border: 0;
}

/* Code window + syntax tokens (always a dark "editor" surface) */
.code-window {
  border-radius: var(--radius-md);
  overflow: hidden;
  background-color: var(--code-bg);
  border: 1px solid #1e2d45;
}
.code-window-bar {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 0.45rem var(--space-4);
  background-color: var(--code-bar);
  color: #cbd5e1;
  font-size: var(--fs-xs);
}
.code-dots {
  display: inline-flex;
  gap: 6px;
}
.code-dots i {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: #475569;
}
.code-dots i:first-child {
  background-color: #f87171;
}
.code-dots i:nth-child(2) {
  background-color: #f2c035;
}
.code-dots i:nth-child(3) {
  background-color: #4ade80;
}
.code-lang {
  font-weight: 700;
  letter-spacing: 0.03em;
  color: #f2c035;
}
.code-file {
  margin-left: auto;
  font-family: var(--font-mono);
  color: #94a3b8;
}
pre.code-block {
  margin: 0;
  padding: var(--space-3) 0;
  border-radius: 0;
  background-color: transparent;
  color: var(--code-text);
  max-height: 480px;
  overflow: auto;
  counter-reset: line;
  font-size: 0.84rem;
  line-height: 1.6;
}
pre.code-block code {
  display: block;
  min-width: max-content;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
}
.code-line {
  display: block;
  padding: 0 var(--space-4);
}
.code-block.has-lines .code-line {
  padding-left: 3.4rem;
  position: relative;
}
.code-block.has-lines .code-line::before {
  counter-increment: line;
  content: counter(line);
  position: absolute;
  left: 0;
  width: 2.5rem;
  text-align: right;
  color: #64748b;
  user-select: none;
}
.tok-k { color: #f2c035; }
.tok-s { color: #86efac; }
.tok-c { color: #94a3b8; font-style: italic; }
.tok-n { color: #fda4af; }
.tok-f { color: #93c5fd; }
.tok-b { color: #7dd3fc; }
.tok-t { color: #f2c035; }
.tok-a { color: #93c5fd; }
.tok-p { color: #93c5fd; }
.tok-h { color: #f2c035; font-weight: 700; }
.example-output pre {
  margin: 0;
  border-left: 4px solid var(--ex-s2);
  background-color: var(--color-surface-alt);
  border-radius: var(--radius-md);
  font-size: 0.82rem;
  white-space: pre-wrap;
}
.example-output code {
  background: none;
  border: 0;
  padding: 0;
}
.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin: 0;
}
.chip {
  display: inline-block;
  padding: 0.15rem 0.6rem;
  border-radius: var(--radius-pill);
  background-color: var(--color-primary-soft);
  color: var(--color-primary-text);
  font-size: var(--fs-xs);
  font-weight: 600;
}

/* Before / after */
.ba-grid {
  display: grid;
  gap: var(--space-3);
  grid-template-columns: 1fr;
}
.ba-panel {
  min-width: 0;
  padding: var(--space-3);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background-color: var(--color-surface-alt);
}
.ba-before {
  border-top: 4px solid var(--ex-bad);
}
.ba-after {
  border-top: 4px solid var(--ex-s2);
}
.ba-tag {
  margin: 0;
  font-size: var(--fs-xs);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.ba-before .ba-tag { color: var(--ex-bad); }
.ba-after .ba-tag { color: var(--ex-s2); }
.ba-caption {
  margin: var(--space-1) 0 var(--space-3);
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
}
.ba-arrow {
  display: none;
  align-self: center;
  font-size: 1.6rem;
  color: var(--color-text-muted);
}
.ba-list {
  margin: 0;
  padding-left: 1.1rem;
  font-size: var(--fs-sm);
}
@media (min-width: 760px) {
  .ba-grid {
    grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  }
  .ba-arrow {
    display: block;
  }
}

/* Mock document (before/after formatting) — always paper-white */
.doc-mock {
  padding: var(--space-4);
  border-radius: var(--radius-sm);
  background-color: #ffffff;
  color: #1f2937;
  box-shadow: 0 1px 4px rgba(15, 23, 42, 0.18);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 0.82rem;
  line-height: 1.5;
}
.doc-mock p,
.doc-mock span {
  margin: 0 0 0.4rem;
}
.doc-h {
  font-family: var(--font-sans);
  font-size: 1.05rem;
  font-weight: 700;
  color: #1d448a;
  border-bottom: 2px solid #1d448a;
  padding-bottom: 0.2rem;
}
.doc-sub {
  font-family: var(--font-sans);
  font-weight: 700;
  color: #1d448a;
  margin-top: 0.6rem !important;
}
.doc-li {
  padding-left: 1rem;
  position: relative;
}
.doc-li::before {
  content: "\2022";
  position: absolute;
  left: 0.2rem;
}
.doc-meta {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  color: #6b7280;
}
.doc-btn {
  display: inline-block;
  padding: 0.2rem 0.7rem;
  border-radius: 4px;
  background-color: #1d448a;
  color: #fff;
  font-family: var(--font-sans);
  font-size: 0.75rem;
}
.doc-row {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 0.4rem;
  padding: 0.2rem 0;
  border-bottom: 1px solid #e5e7eb;
  font-family: var(--font-sans);
  font-size: 0.75rem;
}
.doc-row span {
  margin: 0;
}
.doc-row span:not(:first-child) {
  text-align: right;
}
.doc-shout { text-transform: uppercase; font-weight: 700; }
.doc-cramped { line-height: 1.1; letter-spacing: -0.02em; margin-bottom: 0 !important; }
.doc-mixed { font-family: "Comic Sans MS", "Brush Script MT", cursive; color: #be185d; }
.doc-centered { text-align: center; }
.doc-flat { font-family: Georgia, serif !important; font-size: 0.82rem !important; color: #1f2937 !important; border: 0 !important; font-weight: 400 !important; }
.doc-highlight { background-color: #fde047; }
.doc-muted { color: #9ca3af; }

/* Step-by-step */
.stepper {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-3);
}
.stepper-item {
  display: grid;
  grid-template-columns: 2.2rem minmax(0, 1fr);
  gap: var(--space-3);
  align-items: start;
}
.stepper-num,
.flow-num,
.callout-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: #fff;
  font-weight: 700;
  font-size: var(--fs-sm);
  flex-shrink: 0;
}
body.theme-dark .stepper-num,
body.theme-dark .flow-num,
body.theme-dark .callout-num {
  background-color: #2563eb;
}
.stepper-title {
  margin: 0.25rem 0 var(--space-1);
  font-weight: 700;
}
.stepper-item p {
  margin: 0 0 var(--space-2);
  font-size: var(--fs-sm);
}

/* Workflow */
.flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-5);
  grid-template-columns: 1fr;
}
.flow-node {
  position: relative;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-strong);
  background-color: var(--color-surface-alt);
  min-width: 0;
}
.flow-node:not(:last-child)::after {
  content: "\2193";
  position: absolute;
  left: 50%;
  bottom: calc(-1 * var(--space-5));
  transform: translateX(-50%);
  line-height: var(--space-5);
  color: var(--color-primary-text);
  font-weight: 700;
}
.flow-label {
  margin: var(--space-2) 0 var(--space-1);
  font-weight: 700;
}
.flow-detail,
.flow-owner {
  margin: 0;
  font-size: var(--fs-sm);
}
.flow-owner {
  margin-top: var(--space-1);
  color: var(--color-text-muted);
  font-size: var(--fs-xs);
}
.flow-loop {
  margin: 0;
  padding: var(--space-2) var(--space-3);
  border: 1px dashed var(--color-border-strong);
  border-radius: var(--radius-md);
  font-size: var(--fs-sm);
}
@media (min-width: 900px) {
  .flow {
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  }
  .flow-node:not(:last-child)::after {
    content: "\2192";
    left: auto;
    right: calc(-1 * var(--space-5));
    top: 50%;
    bottom: auto;
    width: var(--space-5);
    text-align: center;
    transform: translateY(-50%);
  }
}

/* Decision tree */
.tree {
  overflow-x: auto;
}
.tree-q,
.tree-result {
  display: inline-block;
  max-width: 34rem;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  font-size: var(--fs-sm);
}
.tree-q {
  border: 2px solid var(--color-primary-text);
  background-color: var(--color-primary-soft);
  font-weight: 600;
}
.tree-result {
  border: 1px solid var(--color-border-strong);
  background-color: var(--color-surface-alt);
}
.tree-fix {
  border-color: var(--ex-s2);
  background-color: var(--color-success-bg);
}
.tree-escalate {
  border-color: var(--ex-bad);
  background-color: var(--color-warning-bg);
}
.tree-branches {
  list-style: none;
  margin: 0 0 0 1rem;
  padding: var(--space-2) 0 0 var(--space-4);
  border-left: 2px solid var(--color-border-strong);
}
.tree-branches > li {
  position: relative;
  margin-bottom: var(--space-3);
}
.tree-branches > li::before {
  content: "";
  position: absolute;
  left: calc(-1 * var(--space-4));
  top: 0.75rem;
  width: calc(var(--space-4) - 0.25rem);
  border-top: 2px solid var(--color-border-strong);
}
.tree-edge {
  display: inline-block;
  margin: 0.35rem var(--space-2) var(--space-1) 0;
  padding: 0 0.5rem;
  border-radius: var(--radius-pill);
  font-size: var(--fs-xs);
  font-weight: 800;
  vertical-align: top;
}
.tree-yes {
  background-color: var(--color-success-bg);
  color: var(--color-success-text);
}
.tree-no {
  background-color: var(--color-warning-bg);
  color: var(--color-warning-text);
}

/* Tables and charts */
.table-scroll {
  overflow-x: auto;
  max-width: 100%;
}
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--fs-sm);
}
.data-table caption {
  text-align: left;
  font-weight: 700;
  padding-bottom: var(--space-2);
}
.data-table th,
.data-table td {
  padding: 0.45rem 0.6rem;
  border-bottom: 1px solid var(--color-border);
  text-align: left;
  vertical-align: top;
}
.data-table thead th {
  background-color: var(--color-surface-alt);
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
}
.data-table td {
  font-variant-numeric: tabular-nums;
}
.tc-grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: minmax(0, 1fr);
}
.chart-wrap {
  padding: var(--space-3);
  border-radius: var(--radius-md);
  background-color: var(--color-surface-alt);
  border: 1px solid var(--color-border);
}
.chart {
  display: block;
  width: 100%;
  height: auto;
}
.chart-grid {
  stroke: var(--color-border);
  stroke-width: 1;
}
.chart-axis-line {
  stroke: var(--color-border-strong);
  stroke-width: 1.5;
}
.chart-axis {
  fill: var(--color-text-muted);
  font-size: 12px;
  font-family: var(--font-sans);
}
.chart-bar.chart-s0, .chart-dot.chart-s0 { fill: var(--ex-s0); }
.chart-bar.chart-s1, .chart-dot.chart-s1 { fill: var(--ex-s1); }
.chart-bar.chart-s2, .chart-dot.chart-s2 { fill: var(--ex-s2); }
.chart-line { stroke-width: 3; stroke-linejoin: round; stroke-linecap: round; }
.chart-line.chart-s0 { stroke: var(--ex-s0); }
.chart-line.chart-s1 { stroke: var(--ex-s1); }
.chart-line.chart-s2 { stroke: var(--ex-s2); }

/* Dashboard */
.dash {
  display: grid;
  gap: var(--space-4);
  padding: var(--space-4);
  border-radius: var(--radius-md);
  background-color: var(--color-surface-alt);
  border: 1px solid var(--color-border);
}
.kpi-grid {
  display: grid;
  gap: var(--space-3);
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 150px), 1fr));
}
.kpi {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-top: 4px solid var(--color-border-strong);
}
.kpi-up { border-top-color: var(--ex-s2); }
.kpi-down { border-top-color: var(--ex-bad); }
.kpi-label {
  margin: 0;
  font-size: var(--fs-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
}
.kpi-value {
  margin: var(--space-1) 0;
  font-size: 1.6rem;
  font-weight: 800;
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
}
.kpi-delta,
.kpi-note {
  margin: 0;
  font-size: var(--fs-xs);
}
.kpi-up .kpi-delta { color: var(--color-success-text); }
.kpi-down .kpi-delta { color: var(--color-incorrect); }
.kpi-note { color: var(--color-text-muted); margin-top: var(--space-1); }

/* Calculation */
.calc-table .calc-work {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-text-muted);
}
.calc-table .calc-amt {
  text-align: right;
  font-weight: 600;
  white-space: nowrap;
}
.calc-table thead th:last-child {
  text-align: right;
}
.calc-total th,
.calc-total td {
  border-top: 2px solid var(--color-text);
  font-weight: 800;
  background-color: var(--color-accent-soft);
}

/* Case study */
.case-grid {
  display: grid;
  gap: var(--space-3);
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 240px), 1fr));
}
.case-grid .example-block {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  background-color: var(--color-surface-alt);
  border-left: 4px solid var(--ex-s0);
}
.case-grid .case-challenge { border-left-color: var(--ex-bad); }
.case-grid .case-actions { border-left-color: var(--ex-s1); }
.case-grid .case-results { border-left-color: var(--ex-s2); }
.numbered-points li::marker {
  font-weight: 700;
  color: var(--color-primary-text);
}

/* SVG diagrams, designs and annotated interfaces */
.svg-grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: minmax(0, 1fr);
}
@media (min-width: 700px) {
  .callouts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
.svg-stage {
  padding: var(--space-3);
  border-radius: var(--radius-md);
  background-color: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  color: var(--color-text);
}
.example-svg {
  display: block;
  width: 100%;
  height: auto;
  font-family: var(--font-sans);
}
.callouts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-3);
}
.callouts li {
  display: grid;
  grid-template-columns: 2.2rem minmax(0, 1fr);
  gap: var(--space-2);
  align-items: start;
}
.callouts p {
  margin: 0;
  font-size: var(--fs-sm);
}
.callouts .callout-label {
  font-weight: 700;
  margin-top: 0.3rem;
}
.example-svg .s-line { fill: none; stroke: currentColor; stroke-width: 2; }
.example-svg .s-thin { fill: none; stroke: var(--color-border-strong); stroke-width: 1.5; }
.example-svg .s-dash { fill: none; stroke: var(--color-text-muted); stroke-width: 1.5; stroke-dasharray: 5 4; }
.example-svg .s-surface { fill: var(--color-surface); stroke: var(--color-border-strong); stroke-width: 1.5; }
.example-svg .s-soft { fill: var(--color-primary-soft); stroke: var(--ex-s0); stroke-width: 1.5; }
.example-svg .s-a { fill: var(--ex-s0); }
.example-svg .s-b { fill: var(--ex-s1); }
.example-svg .s-c { fill: var(--ex-s2); }
.example-svg .s-bad { fill: var(--ex-bad); }
.example-svg .s-stroke-a { fill: none; stroke: var(--ex-s0); stroke-width: 2.5; }
.example-svg .s-stroke-b { fill: none; stroke: var(--ex-s1); stroke-width: 2.5; }
.example-svg .s-text { fill: var(--color-text); font-size: 14px; }
.example-svg .s-small { fill: var(--color-text-muted); font-size: 12px; }
.example-svg .s-strong { fill: var(--color-text); font-size: 15px; font-weight: 700; }
.example-svg .s-on-a { fill: #ffffff; font-size: 13px; font-weight: 700; }
.example-svg .s-on-b { fill: #1f2937; font-size: 13px; font-weight: 700; }
.example-svg .s-badge { fill: var(--ex-s1); }
.example-svg .s-badge-text { fill: #1f2937; font-size: 13px; font-weight: 800; }

/* Lesson pages */
.lesson-lead {
  margin: var(--space-2) 0 0;
  max-width: 70ch;
  color: var(--color-text-muted);
  font-size: var(--fs-lg);
  line-height: 1.5;
}
.lesson-goals {
  margin-bottom: var(--space-5);
}
.lesson-section {
  margin-bottom: var(--space-6);
}
.lesson-section h2,
.knowledge-check h2,
.resource-list h2 {
  font-size: var(--fs-xl);
  margin: 0 0 var(--space-3);
}
.lesson-section p {
  max-width: 72ch;
  line-height: 1.7;
}
.step-list {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
  display: grid;
  gap: var(--space-2);
}
.step-list li {
  counter-increment: step;
  position: relative;
  padding: var(--space-3) var(--space-4) var(--space-3) 3.2rem;
  border-radius: var(--radius-md);
  background-color: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  font-size: var(--fs-sm);
}
.step-list li::before {
  content: counter(step);
  position: absolute;
  left: var(--space-3);
  top: 50%;
  transform: translateY(-50%);
  width: 1.7rem;
  height: 1.7rem;
  border-radius: 50%;
  background-color: var(--color-accent);
  color: #1f2937;
  font-weight: 800;
  font-size: var(--fs-xs);
  display: flex;
  align-items: center;
  justify-content: center;
}
.activity-card .activity-result {
  margin-top: var(--space-2);
}
.knowledge-check {
  margin: var(--space-6) 0;
}
.knowledge-check ol {
  margin: 0;
  padding-left: 1.3rem;
}
.knowledge-check li {
  margin-bottom: var(--space-3);
}
.knowledge-check li > p {
  margin: 0 0 var(--space-1);
  font-weight: 600;
}
.knowledge-check details {
  font-size: var(--fs-sm);
}
.knowledge-check summary {
  cursor: pointer;
  color: var(--color-primary-text);
  font-weight: 600;
}
.knowledge-check details p {
  margin: var(--space-2) 0 0;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  background-color: var(--color-success-bg);
}
.resource-list {
  margin: var(--space-6) 0;
}
.resource-list ul {
  padding-left: 1.2rem;
}
.resource-list li {
  margin-bottom: var(--space-2);
  font-size: var(--fs-sm);
}
/* Program names inside a sentence: underline so the link doesn't rely on colour alone (WCAG 1.4.1). */
#related-programs a {
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 0.15em;
}
.lesson-item-link {
  color: inherit;
  text-decoration: none;
}
.lesson-item-link:hover {
  color: var(--color-primary-text);
  text-decoration: underline;
}
.takeaways {
  margin: var(--space-5) 0;
}

/* Taster / related cards */
.taster-card {
  display: grid;
  gap: var(--space-1);
  margin: var(--space-5) 0;
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background-color: var(--color-surface);
  color: inherit;
  text-decoration: none;
  box-shadow: var(--shadow-sm);
}
.taster-card:hover {
  border-color: var(--color-primary-text);
}
.taster-card .badge {
  justify-self: start;
}
.taster-card-title {
  font-weight: 700;
  font-size: var(--fs-lg);
}
.taster-card-text {
  color: var(--color-text-muted);
  font-size: var(--fs-sm);
}

/* Galleries: examples, free courses, internship specializations */
.example-gallery,
.course-grid,
.spec-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-4);
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 260px), 1fr));
}
.example-card-link,
.course-card-link,
.spec-card-link {
  display: grid;
  gap: var(--space-2);
  height: 100%;
  align-content: start;
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background-color: var(--color-surface);
  color: inherit;
  text-decoration: none;
  box-shadow: var(--shadow-sm);
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.example-card-link:hover,
.course-card-link:hover,
.spec-card-link:hover {
  border-color: var(--color-primary-text);
  transform: translateY(-2px);
}
.example-card-link .example-type {
  justify-self: start;
}
.example-card-title,
.course-card-title,
.spec-card-title {
  font-weight: 700;
  font-size: var(--fs-lg);
  line-height: 1.3;
}
.example-card-text,
.course-card-text,
.spec-card-text {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
}
.example-card-where,
.course-card-meta,
.spec-card-meta {
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--color-primary-text);
}
.program-row-facts {
  margin: var(--space-1) 0 0;
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--color-primary-text);
}
.free-module {
  margin: var(--space-6) 0;
  padding: var(--space-5);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background-color: var(--color-surface);
}
.free-module h2 {
  margin: var(--space-1) 0 var(--space-2);
}
.free-module .lesson-index-list {
  margin-top: var(--space-4);
}

/* Internship specialization pages */
.spec-choose {
  margin: var(--space-6) 0;
}
.scenario-card {
  margin: var(--space-4) 0 var(--space-5);
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-lg);
  background-color: var(--color-accent-soft);
  border-left: 4px solid var(--color-accent);
}
.scenario-card p:last-child {
  margin: 0;
}
.week-list {
  list-style: none;
  margin: 0 0 var(--space-5);
  padding: 0;
  display: grid;
  gap: var(--space-3);
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 240px), 1fr));
}
.week-card {
  padding: var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background-color: var(--color-surface);
}
.week-card h3 {
  margin: var(--space-1) 0 var(--space-2);
  font-size: var(--fs-md);
}
.week-card ul {
  margin: 0;
  padding-left: 1.1rem;
  font-size: var(--fs-sm);
}

@media (max-width: 480px) {
  .example-head,
  .example-body {
    padding-left: var(--space-3);
    padding-right: var(--space-3);
  }
  .kpi-value {
    font-size: 1.3rem;
  }
}