/* ===== DESIGN TOKENS (shared with main site) ===== */
:root {
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3rem);

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  --font-display: 'Clash Display', Georgia, serif;
  --font-body: 'Satoshi', 'Helvetica Neue', sans-serif;

  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1.25rem;
  --radius-full: 9999px;

  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  --content-narrow: 640px;
  --content-default: 1040px;
  --content-wide: 1220px;
}

:root, [data-theme='light'] {
  --color-bg: #FAF6F1;
  --color-surface: #FFFFFF;
  --color-surface-2: #F3EBE2;
  --color-border: #E4D9CB;
  --color-text: #2A2320;
  --color-text-muted: #756A5F;
  --color-text-faint: #B3A596;
  --color-text-inverse: #FAF6F1;

  --color-primary: #B8502E;
  --color-primary-hover: #964026;
  --color-primary-active: #7A331F;
  --color-primary-highlight: #EEDCD1;

  --color-accent-2: #2B4A43;
  --color-success: #437A22;
  --color-error: #A12C7B;

  --shadow-sm: 0 1px 2px rgba(42, 35, 32, 0.06);
  --shadow-md: 0 4px 16px rgba(42, 35, 32, 0.08);
  --shadow-lg: 0 16px 40px rgba(42, 35, 32, 0.12);
}

[data-theme='dark'] {
  --color-bg: #1B1613;
  --color-surface: #221C18;
  --color-surface-2: #2A2320;
  --color-border: #3B322C;
  --color-text: #F1E9E1;
  --color-text-muted: #B3A596;
  --color-text-faint: #7A6E62;
  --color-text-inverse: #1B1613;

  --color-primary: #E38159;
  --color-primary-hover: #EC9B78;
  --color-primary-active: #F2B49B;
  --color-primary-highlight: #3A2A22;

  --color-accent-2: #6FA396;
  --color-success: #6DAA45;
  --color-error: #D163A7;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.5);
}

/* ===== BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  -webkit-text-size-adjust: none;
  text-size-adjust: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  min-height: 100dvh;
  line-height: 1.6;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
}

img, svg, video { display: block; max-width: 100%; height: auto; }

h1, h2, h3, h4 { text-wrap: balance; line-height: 1.15; font-family: var(--font-display); font-weight: 600; }
p, li { text-wrap: pretty; }

a { color: inherit; text-decoration: none; }

button { font: inherit; cursor: pointer; background: none; border: none; color: inherit; }

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

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

/* ===== LAYOUT SHELL ===== */
.course-shell {
  display: flex;
  min-height: 100dvh;
}

/* --- Sidebar nav --- */
.course-sidebar {
  width: 280px;
  flex-shrink: 0;
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
  position: sticky;
  top: 0;
  height: 100dvh;
  overflow-y: auto;
}

.course-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-lg);
  color: var(--color-text);
}
.course-logo svg { color: var(--color-primary); }

.course-progress-summary {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.course-progress-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.course-progress-track {
  height: 6px;
  border-radius: var(--radius-full);
  background: var(--color-surface-2);
  overflow: hidden;
}
.course-progress-fill {
  height: 100%;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  transition: width 400ms var(--transition-interactive);
  width: 0%;
}
.course-progress-count { font-size: var(--text-sm); color: var(--color-text-muted); }

.course-nav-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  list-style: none;
  flex: 1;
}

.course-nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-3);
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  transition: background var(--transition-interactive), color var(--transition-interactive);
}
.course-nav-item:hover {
  background: var(--color-surface-2);
  color: var(--color-text);
}
.course-nav-item.is-active {
  background: var(--color-primary-highlight);
  color: var(--color-primary);
  font-weight: 600;
}
.course-nav-item.is-active .course-nav-num {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}

.course-nav-num {
  width: 24px;
  height: 24px;
  border-radius: var(--radius-full);
  background: var(--color-surface-2);
  color: var(--color-text-faint);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  font-weight: 600;
  flex-shrink: 0;
}
.course-nav-num.is-complete {
  background: var(--color-success);
  color: #fff;
}

.course-nav-check {
  margin-left: auto;
  color: var(--color-success);
  flex-shrink: 0;
  display: none;
}
.course-nav-item.is-complete .course-nav-check { display: block; }

.course-sidebar-footer {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
}
.course-sidebar-link {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.course-sidebar-link:hover { color: var(--color-primary); }

/* Mobile sidebar toggle */
.course-mobile-header {
  display: none;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 20;
}
.course-mobile-toggle {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--color-text);
}
.course-mobile-toggle:hover { background: var(--color-surface-2); }

@media (max-width: 860px) {
  .course-mobile-header { display: flex; }
  .course-sidebar {
    position: fixed;
    left: 0;
    top: 0;
    z-index: 30;
    transform: translateX(-100%);
    transition: transform 240ms var(--transition-interactive);
    box-shadow: var(--shadow-lg);
    width: 84vw;
    max-width: 320px;
  }
  .course-sidebar.is-open { transform: translateX(0); }
  .course-sidebar-scrim {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    z-index: 25;
  }
  .course-sidebar-scrim.is-open { display: block; }
}

/* --- Main content --- */
.course-main {
  flex: 1;
  min-width: 0;
  padding: var(--space-10) var(--space-8) var(--space-24);
}
.course-main-inner {
  max-width: var(--content-default);
  margin: 0 auto;
}

.course-theme-toggle {
  position: fixed;
  top: var(--space-5);
  right: var(--space-6);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  z-index: 15;
}
.course-theme-toggle:hover { color: var(--color-primary); }

/* ===== ACCESS GATE ===== */
.gate-screen {
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
  background: var(--color-bg);
}
.gate-card {
  width: 100%;
  max-width: 420px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-10) var(--space-8);
  box-shadow: var(--shadow-md);
  text-align: center;
}
.gate-logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-lg);
  margin-bottom: var(--space-6);
  color: var(--color-text);
}
.gate-logo svg { color: var(--color-primary); }
.gate-card h1 {
  font-size: var(--text-xl);
  margin-bottom: var(--space-2);
}
.gate-card p {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  margin-bottom: var(--space-6);
}
.gate-form { display: flex; flex-direction: column; gap: var(--space-3); }
.gate-input {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  font-size: var(--text-base);
  color: var(--color-text);
  text-align: center;
}
.gate-input:focus-visible { outline-offset: 0; }
.gate-error {
  font-size: var(--text-sm);
  color: var(--color-error);
  min-height: 1.4em;
}
.gate-hint {
  margin-top: var(--space-6);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: var(--text-sm);
  transition: background var(--transition-interactive), color var(--transition-interactive), transform var(--transition-interactive);
}
.btn-primary {
  background: var(--color-primary);
  color: #fff;
}
.btn-primary:hover { background: var(--color-primary-hover); }
.btn-secondary {
  background: var(--color-surface-2);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}
.btn-secondary:hover { background: var(--color-border); }
.btn-block { width: 100%; }
.btn:active { transform: scale(0.98); }

/* ===== COURSE HOME ===== */
.course-home-header { margin-bottom: var(--space-10); }
.course-home-eyebrow {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-primary);
  font-weight: 600;
  margin-bottom: var(--space-3);
}
.course-home-header h1 { font-size: var(--text-2xl); margin-bottom: var(--space-3); }
.course-home-header p { color: var(--color-text-muted); font-size: var(--text-base); max-width: 60ch; }

.module-grid {
  display: grid;
  gap: var(--space-4);
}
.module-card {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: var(--space-5);
  padding: var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-interactive), transform var(--transition-interactive), box-shadow var(--transition-interactive);
}
.module-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}
.module-card-num {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background: var(--color-surface-2);
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-lg);
  flex-shrink: 0;
}
.module-card.is-complete .module-card-num {
  background: var(--color-success);
  color: #fff;
}
.module-card-title { font-size: var(--text-lg); margin-bottom: var(--space-1); }
.module-card-desc { color: var(--color-text-muted); font-size: var(--text-sm); }
.module-card-status {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.module-card-status.is-complete { color: var(--color-success); font-weight: 600; }

@media (max-width: 600px) {
  .module-card { grid-template-columns: auto 1fr; }
  .module-card-status { grid-column: 2; justify-self: start; margin-top: var(--space-2); }
}

/* ===== MODULE PAGE ===== */
.module-breadcrumb {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.module-breadcrumb a:hover { color: var(--color-primary); }

.module-header {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: var(--space-10);
  align-items: center;
  margin-bottom: var(--space-12);
}
.module-header-text { min-width: 0; }
.module-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  font-weight: 700;
  margin-bottom: var(--space-4);
}
.module-eyebrow::before {
  content: '';
  width: 28px;
  height: 2px;
  background: var(--color-primary);
  display: inline-block;
}
.module-header h1 { font-size: var(--text-2xl); margin-bottom: var(--space-4); }
.module-header-text > p { color: var(--color-text-muted); max-width: 52ch; font-size: var(--text-base); }
.module-cover {
  border-radius: var(--radius-xl);
  overflow: hidden;
  aspect-ratio: 4/3;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
}
.module-cover img { width: 100%; height: 100%; object-fit: cover; }

@media (max-width: 760px) {
  .module-header { grid-template-columns: 1fr; gap: var(--space-6); }
  .module-cover { order: -1; aspect-ratio: 16/9; }
}

.video-placeholder {
  position: relative;
  aspect-ratio: 16/9;
  background:
    radial-gradient(circle at 15% 20%, color-mix(in srgb, var(--color-primary) 10%, transparent), transparent 45%),
    radial-gradient(circle at 85% 80%, color-mix(in srgb, var(--color-accent-2) 14%, transparent), transparent 50%),
    var(--color-surface-2);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-10);
  overflow: hidden;
  border: 1px solid var(--color-border);
}
.video-placeholder::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--color-border) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-border) 1px, transparent 1px);
  background-size: 32px 32px;
  opacity: 0.35;
}
.video-placeholder-inner {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-text-muted);
  text-align: center;
  padding: var(--space-6);
}
.video-play-icon {
  width: 68px;
  height: 68px;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-interactive);
}
.video-placeholder:hover .video-play-icon { transform: scale(1.06); }
.video-placeholder-label { font-size: var(--text-sm); font-weight: 700; color: var(--color-text); letter-spacing: 0.01em; }
.video-placeholder-sub { font-size: var(--text-xs); color: var(--color-text-faint); }
.video-duration-badge {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  z-index: 2;
  background: var(--color-text);
  color: var(--color-bg);
  font-size: var(--text-xs);
  font-weight: 600;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
}

@media (max-width: 480px) {
  .video-placeholder { aspect-ratio: 4/3; }
  .video-placeholder-sub { max-width: 220px; }
}

.module-body {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: var(--space-10);
  align-items: start;
}
@media (max-width: 860px) {
  .module-body { grid-template-columns: 1fr; }
}

.module-content h2 {
  font-size: var(--text-lg);
  margin-top: var(--space-8);
  margin-bottom: var(--space-4);
}
.module-content h2:first-child { margin-top: 0; }
.module-content p { margin-bottom: var(--space-4); color: var(--color-text); }
.module-content ul { margin-bottom: var(--space-4); padding-left: var(--space-5); }
.module-content li { margin-bottom: var(--space-2); }
.module-content strong { color: var(--color-text); font-weight: 600; }
.module-quote {
  border-left: 3px solid var(--color-primary);
  padding-left: var(--space-4);
  margin: var(--space-6) 0;
  font-style: normal;
  color: var(--color-text-muted);
  font-size: var(--text-base);
}

.module-sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  position: sticky;
  top: var(--space-8);
}

.template-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  position: relative;
  overflow: hidden;
}
.template-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--color-primary);
}
.template-card-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--color-primary-highlight);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-4);
}
.template-card h3 { font-size: var(--text-base); margin-bottom: var(--space-2); }
.template-card p { font-size: var(--text-sm); color: var(--color-text-muted); margin-bottom: var(--space-5); }

.mark-complete-card {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  text-align: center;
}
.mark-complete-card p { font-size: var(--text-sm); color: var(--color-text-muted); margin-bottom: var(--space-4); }
.mark-complete-card.is-complete { background: var(--color-primary-highlight); }
.mark-complete-check {
  color: var(--color-success);
  display: none;
  align-items: center;
  gap: var(--space-2);
  justify-content: center;
  font-size: var(--text-sm);
  font-weight: 600;
  margin-bottom: var(--space-3);
}
.mark-complete-card.is-complete .mark-complete-check { display: flex; }
.mark-complete-card.is-complete .mark-complete-btn { display: none; }

.module-footer-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
  margin-top: var(--space-16);
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-border);
}
.footer-nav-link {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  max-width: 45%;
}
.footer-nav-link:hover { color: var(--color-primary); }
.footer-nav-link.next { text-align: right; align-items: flex-end; }
.footer-nav-label { font-size: var(--text-xs); color: var(--color-text-faint); text-transform: uppercase; letter-spacing: 0.04em; }
.footer-nav-title { font-weight: 600; color: var(--color-text); }