/* ============================================================
   Y'ALL TOO — REDESIGN STYLESHEET
   Mobile-first, light-theme educational experience
   Brand: Genesis Engineered Interpretation (GEI)
   ============================================================ */

/* ------------------------------------------------------------
   1. DESIGN TOKENS
   ------------------------------------------------------------ */
:root {
  /* Brand palette */
  --yt-cyan: #2fd2ff;
  --yt-indigo: #3d3dea;
  --yt-magenta: #f310ba;
  --yt-pink: #ff9df2;
  --yt-charcoal: #06070d;

  /* Semantic surfaces */
  --yt-bg: #f5fbff;
  --yt-surface: #ffffff;
  --yt-text: #10233f;
  --yt-body: #24364f;
  --yt-muted: #5d7088;
  --yt-line: #cfe3ef;
  --yt-focus: #3d3dea;
  --yt-focus-glow: rgba(47, 210, 255, 0.35);

  /* Gradient */
  --yt-gradient: linear-gradient(135deg, #2fd2ff 0%, #3d3dea 100%);
  --yt-gradient-soft: linear-gradient(135deg, rgba(47, 210, 255, 0.12) 0%, rgba(61, 61, 234, 0.08) 100%);

  /* Spacing scale */
  --sp-2: 2px;
  --sp-4: 4px;
  --sp-8: 8px;
  --sp-12: 12px;
  --sp-16: 16px;
  --sp-20: 20px;
  --sp-24: 24px;
  --sp-32: 32px;
  --sp-40: 40px;
  --sp-48: 48px;
  --sp-64: 64px;

  /* Radii */
  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 16px;
  --r-xl: 24px;
  --r-full: 9999px;

  /* Shadows */
  --shadow-card: 0 1px 3px rgba(16, 35, 63, 0.06), 0 4px 12px rgba(16, 35, 63, 0.04);
  --shadow-raised: 0 2px 8px rgba(16, 35, 63, 0.08), 0 8px 24px rgba(16, 35, 63, 0.06);
  --shadow-float: 0 4px 16px rgba(16, 35, 63, 0.1), 0 12px 40px rgba(16, 35, 63, 0.08);

  /* Typography */
  --font-sans: 'Plus Jakarta Sans', Inter, system-ui, -apple-system, sans-serif;
  --fs-xs: 0.75rem;
  --fs-sm: 0.875rem;
  --fs-base: 1.125rem;
  --fs-lg: 1.25rem;
  --fs-xl: 1.5rem;
  --fs-2xl: 1.875rem;
  --fs-3xl: 2.25rem;

  /* Transitions */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --dur-fast: 150ms;
  --dur-normal: 250ms;
  --dur-slow: 400ms;

  /* Layout */
  --nav-height: 64px;
  --gutter: 16px;
  --content-max: 800px;

  color-scheme: light;
}


/* ------------------------------------------------------------
   2. RESET & BASE
   ------------------------------------------------------------ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: 1.6;
  color: var(--yt-body);
  background-color: var(--yt-bg);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

a:hover {
  text-decoration: underline;
}

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

h1, h2, h3, h4 {
  color: var(--yt-text);
  line-height: 1.2;
  font-weight: 700;
}

h1 { font-size: var(--fs-3xl); }
h2 { font-size: var(--fs-2xl); }
h3 { font-size: var(--fs-xl); }


/* ------------------------------------------------------------
   3. FOCUS STATES (Accessibility)
   ------------------------------------------------------------ */
:focus-visible {
  outline: 3px solid var(--yt-focus);
  outline-offset: 2px;
  box-shadow: 0 0 0 6px var(--yt-focus-glow);
}

a:focus-visible,
button:focus-visible {
  border-radius: var(--r-sm);
}


/* ------------------------------------------------------------
   4. SHARED COMPONENTS
   ------------------------------------------------------------ */

/* Kicker — uppercase label above headings */
.kicker {
  display: block;
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--yt-muted);
  margin-bottom: var(--sp-8);
}

/* Section header */
.section-header {
  margin-bottom: var(--sp-32);
}

.section-header h2 {
  margin-bottom: var(--sp-8);
}

.section-header p {
  color: var(--yt-muted);
  font-size: var(--fs-base);
  max-width: 540px;
}

/* Primary button */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-8);
  min-height: 48px;
  padding: var(--sp-12) var(--sp-32);
  font-size: var(--fs-base);
  font-weight: 600;
  color: #ffffff;
  background: var(--yt-gradient);
  border: none;
  border-radius: var(--r-full);
  cursor: pointer;
  transition: transform var(--dur-fast) var(--ease-out),
              box-shadow var(--dur-fast) var(--ease-out);
  text-decoration: none;
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-raised);
  text-decoration: none;
}

.btn-primary:active {
  transform: translateY(0);
}

/* Secondary button */
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-8);
  min-height: 48px;
  padding: var(--sp-12) var(--sp-32);
  font-size: var(--fs-base);
  font-weight: 600;
  color: var(--yt-indigo);
  background: rgba(61, 61, 234, 0.08);
  border: none;
  border-radius: var(--r-full);
  cursor: pointer;
  transition: background var(--dur-fast) var(--ease-out);
  text-decoration: none;
}

.btn-secondary:hover {
  background: rgba(61, 61, 234, 0.14);
  text-decoration: none;
}

/* Outline button */
.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-8);
  min-height: 48px;
  padding: var(--sp-12) var(--sp-24);
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--yt-body);
  background: transparent;
  border: 2px solid var(--yt-line);
  border-radius: var(--r-full);
  cursor: pointer;
  transition: border-color var(--dur-fast) var(--ease-out),
              color var(--dur-fast) var(--ease-out);
  text-decoration: none;
}

.btn-outline:hover {
  border-color: var(--yt-indigo);
  color: var(--yt-indigo);
  text-decoration: none;
}

/* Action group (button row) */
.action-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-12);
  align-items: center;
}


/* ------------------------------------------------------------
   5. SPLASH OVERLAY
   ------------------------------------------------------------ */
.splash-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  overflow: hidden;
  background: var(--yt-charcoal);
  opacity: 1;
  transition: opacity var(--dur-slow) var(--ease-out);
}

.splash-overlay.is-hidden {
  opacity: 0;
  pointer-events: none;
}

.splash-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.splash-scrim {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(6, 7, 13, 0.85) 0%,
    rgba(6, 7, 13, 0.4) 40%,
    rgba(6, 7, 13, 0.15) 100%
  );
  z-index: 1;
}

.splash-center {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--sp-32) var(--gutter) var(--sp-48);
  max-width: 440px;
  width: 100%;
}

.splash-logo {
  width: 80px;
  height: 80px;
  margin-bottom: var(--sp-16);
  border-radius: var(--r-lg);
  box-shadow: 0 4px 20px rgba(47, 210, 255, 0.25);
}

.splash-tagline {
  font-size: var(--fs-sm);
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--yt-cyan);
  margin-bottom: var(--sp-12);
}

.splash-message {
  font-size: var(--fs-lg);
  font-weight: 500;
  color: #ffffff;
  line-height: 1.4;
  margin-bottom: var(--sp-24);
  min-height: 3.6em;
}

.splash-enter-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: var(--sp-12) var(--sp-40);
  font-size: var(--fs-base);
  font-weight: 700;
  color: var(--yt-charcoal);
  background: var(--yt-cyan);
  border: none;
  border-radius: var(--r-full);
  cursor: pointer;
  letter-spacing: 0.04em;
  transition: transform var(--dur-fast) var(--ease-out),
              box-shadow var(--dur-fast) var(--ease-out);
}

.splash-enter-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(47, 210, 255, 0.35);
}

.splash-bar-wrap {
  width: 100%;
  max-width: 200px;
  height: 4px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: var(--r-full);
  margin-top: var(--sp-24);
  overflow: hidden;
}

.splash-bar-fill {
  height: 100%;
  background: var(--yt-cyan);
  border-radius: var(--r-full);
  width: 0%;
  transition: width 100ms linear;
}


.app-wrapper {
  display: block;
}


/* ------------------------------------------------------------
   6. NAVIGATION
   ------------------------------------------------------------ */
.site-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
  padding: 0 var(--sp-8);
  background: var(--yt-surface);
  border-top: 1px solid var(--yt-line);
  box-shadow: 0 -2px 12px rgba(16, 35, 63, 0.04);
}

.nav-logo {
  display: flex;
  align-items: center;
  padding: var(--sp-8);
  flex-shrink: 0;
}

.nav-logo img {
  width: 32px;
  height: 32px;
  border-radius: var(--r-sm);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  flex: 1;
  justify-content: space-around;
}

.nav-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  min-width: 56px;
  min-height: 48px;
  padding: var(--sp-4) var(--sp-8);
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--yt-muted);
  background: transparent;
  border: none;
  border-radius: var(--r-md);
  cursor: pointer;
  transition: color var(--dur-fast) var(--ease-out),
              background var(--dur-fast) var(--ease-out);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.nav-btn:hover {
  color: var(--yt-indigo);
  background: rgba(61, 61, 234, 0.05);
}

.nav-btn.is-active {
  color: var(--yt-indigo);
  background: rgba(61, 61, 234, 0.08);
}

.nav-btn .nav-icon {
  font-size: 1.25rem;
  line-height: 1;
}


/* ------------------------------------------------------------
   7. SCREEN CONTAINER
   ------------------------------------------------------------ */
.screen-container {
  padding-bottom: calc(var(--nav-height) + var(--sp-16));
  min-height: 100vh;
  min-height: 100dvh;
}

.screen {
  display: none;
  padding: var(--sp-32) var(--gutter) var(--sp-48);
  max-width: var(--content-max);
  margin: 0 auto;
}

.screen.is-active {
  display: block;
}

.screen-scroll {
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}


/* ------------------------------------------------------------
   8. HOME SCREEN
   ------------------------------------------------------------ */
.home-hero {
  text-align: center;
  padding: var(--sp-48) 0 var(--sp-32);
}

.home-hero h1 {
  font-size: var(--fs-3xl);
  margin-bottom: var(--sp-12);
  background: var(--yt-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.home-hero p {
  font-size: var(--fs-base);
  color: var(--yt-muted);
  max-width: 420px;
  margin: 0 auto var(--sp-24);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-12);
  justify-content: center;
}

/* Day 1 Audio Preview Card */
.audio-preview-card {
  background: var(--yt-surface);
  border-radius: var(--r-xl);
  padding: var(--sp-24);
  box-shadow: var(--shadow-card);
  margin-bottom: var(--sp-32);
}

.audio-preview-header {
  margin-bottom: var(--sp-16);
}

.audio-preview-header .kicker {
  margin-bottom: 0;
}

.audio-preview-header h2 {
  font-size: var(--fs-lg);
  margin-top: var(--sp-4);
}

.audio-preview-header p {
  font-size: var(--fs-sm);
  color: var(--yt-muted);
  line-height: 1.5;
  margin-top: var(--sp-8);
}

/* Audio Player */
.audio-player {
  display: flex;
  align-items: center;
  gap: var(--sp-12);
  margin-bottom: var(--sp-12);
}

.play-pause-btn {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--yt-gradient);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  cursor: pointer;
  transition: transform var(--dur-fast) var(--ease-out),
              box-shadow var(--dur-fast) var(--ease-out);
}

.play-pause-btn:hover {
  transform: scale(1.06);
  box-shadow: 0 4px 16px rgba(47, 210, 255, 0.3);
}

.play-icon {
  font-size: 1.25rem;
  line-height: 1;
  margin-left: 2px;
}

.player-track {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
}

.player-progress {
  position: relative;
  width: 100%;
  height: 6px;
  background: var(--yt-line);
  border-radius: var(--r-full);
  overflow: hidden;
  cursor: pointer;
}

.player-fill {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  background: var(--yt-gradient);
  border-radius: var(--r-full);
  width: 0%;
  transition: width 100ms linear;
}

.player-times {
  display: flex;
  justify-content: space-between;
  font-size: var(--fs-xs);
  color: var(--yt-muted);
  font-variant-numeric: tabular-nums;
}

.audio-preview-link {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-8);
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--yt-indigo);
  text-decoration: none;
  margin-top: var(--sp-4);
}

.audio-preview-link:hover {
  text-decoration: underline;
}

/* Educational Cards */
.home-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-16);
  margin-bottom: var(--sp-32);
}

.edu-card {
  display: flex;
  align-items: flex-start;
  gap: var(--sp-16);
  background: var(--yt-surface);
  border-radius: var(--r-lg);
  padding: var(--sp-20);
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--dur-normal) var(--ease-out);
}

.edu-card:hover {
  box-shadow: var(--shadow-raised);
}

.edu-card-icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  border-radius: var(--r-md);
  background: var(--yt-gradient-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.edu-card h3 {
  font-size: var(--fs-base);
  margin-bottom: var(--sp-4);
}

.edu-card p {
  font-size: var(--fs-sm);
  color: var(--yt-muted);
  line-height: 1.5;
}

/* Six-Day Journey Meter */
.journey-meter {
  background: var(--yt-surface);
  border-radius: var(--r-xl);
  padding: var(--sp-24);
  box-shadow: var(--shadow-card);
  margin-bottom: var(--sp-32);
}

.journey-meter h3 {
  font-size: var(--fs-lg);
  margin-bottom: var(--sp-4);
}

.journey-count {
  font-size: var(--fs-sm);
  color: var(--yt-muted);
  margin-bottom: var(--sp-20);
}

.journey-track {
  padding: var(--sp-8) 0;
}

.journey-bar {
  height: 6px;
  background: var(--yt-line);
  border-radius: var(--r-full);
  overflow: hidden;
  margin-bottom: var(--sp-12);
}

.journey-fill {
  display: block;
  height: 100%;
  background: var(--yt-gradient);
  border-radius: var(--r-full);
  width: 0%;
  transition: width var(--dur-normal) var(--ease-out);
}

.journey-stages {
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
}

.journey-connector {
  flex: 1;
  height: 3px;
  background: var(--yt-line);
  margin: 0 var(--sp-2);
  border-radius: var(--r-full);
  transition: background var(--dur-normal) var(--ease-out);
}

.journey-stage.is-complete ~ .journey-connector,
.journey-connector.is-filled {
  background: var(--yt-gradient);
}

.journey-stage {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--yt-surface);
  border: 3px solid var(--yt-line);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--fs-sm);
  font-weight: 700;
  color: var(--yt-muted);
  transition: all var(--dur-normal) var(--ease-out);
  position: relative;
  z-index: 1;
}

.journey-stage.is-complete {
  background: var(--yt-gradient);
  border-color: transparent;
  color: #ffffff;
}

.journey-stage.is-current {
  border-color: var(--yt-cyan);
  color: var(--yt-indigo);
  box-shadow: 0 0 0 4px var(--yt-focus-glow);
}


/* ------------------------------------------------------------
   9. ACADEMY SCREEN
   ------------------------------------------------------------ */
.academy-header {
  text-align: center;
  padding: var(--sp-32) 0 var(--sp-24);
}

.academy-header h1 {
  margin-bottom: var(--sp-8);
}

.academy-header p {
  color: var(--yt-muted);
  max-width: 480px;
  margin: 0 auto;
}

/* Academy overall progress bar */
.academy-progress-bar {
  margin-bottom: var(--sp-32);
}

.academy-bar-track {
  width: 100%;
  height: 8px;
  background: var(--yt-line);
  border-radius: var(--r-full);
  overflow: hidden;
}

.academy-bar-fill {
  height: 100%;
  background: var(--yt-gradient);
  border-radius: var(--r-full);
  width: 0%;
  transition: width var(--dur-slow) var(--ease-out);
}

.academy-bar-label {
  display: flex;
  justify-content: space-between;
  margin-top: var(--sp-8);
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--yt-muted);
}

/* Lesson cards list */
.academy-lessons {
  display: flex;
  flex-direction: column;
  gap: var(--sp-16);
  margin-bottom: var(--sp-32);
}

.lesson-card {
  display: flex;
  align-items: flex-start;
  gap: var(--sp-16);
  background: var(--yt-surface);
  border-radius: var(--r-lg);
  padding: var(--sp-20);
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--dur-normal) var(--ease-out),
              opacity var(--dur-normal) var(--ease-out);
}

.lesson-card:hover {
  box-shadow: var(--shadow-raised);
}

.lesson-card.is-locked {
  opacity: 0.55;
  pointer-events: none;
}

.lesson-card.is-current {
  border: 2px solid var(--yt-cyan);
  box-shadow: 0 0 0 4px var(--yt-focus-glow), var(--shadow-card);
}

.lesson-card.is-complete {
  border-left: 4px solid var(--yt-cyan);
}

/* Lesson badge (day number circle) */
.lesson-badge {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--fs-lg);
  font-weight: 800;
  background: var(--yt-gradient-soft);
  color: var(--yt-indigo);
}

.lesson-card.is-complete .lesson-badge {
  background: var(--yt-gradient);
  color: #ffffff;
}

.lesson-card.is-locked .lesson-badge {
  background: var(--yt-line);
  color: var(--yt-muted);
}

/* Lesson info (right side) */
.lesson-info {
  flex: 1;
  min-width: 0;
}

.lesson-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-8);
  margin-bottom: var(--sp-4);
}

.lesson-top .kicker {
  margin-bottom: 0;
}

.lesson-status {
  font-size: var(--fs-xs);
  font-weight: 700;
  padding: var(--sp-2) var(--sp-8);
  border-radius: var(--r-full);
  white-space: nowrap;
}

.lesson-card.is-complete .lesson-status {
  background: rgba(47, 210, 255, 0.12);
  color: var(--yt-indigo);
}

.lesson-card.is-current .lesson-status {
  background: rgba(243, 16, 186, 0.1);
  color: var(--yt-magenta);
}

.lesson-card.is-locked .lesson-status {
  background: var(--yt-line);
  color: var(--yt-muted);
}

.lesson-info h3 {
  font-size: var(--fs-base);
  margin-bottom: var(--sp-4);
}

.lesson-info p {
  font-size: var(--fs-sm);
  color: var(--yt-muted);
  line-height: 1.5;
}

.lesson-audio {
  margin-top: var(--sp-8);
}

.lesson-audio audio,
.audio-preview-card audio {
  width: 100%;
  max-width: 100%;
  border-radius: var(--r-md);
}

.lesson-footer {
  display: flex;
  align-items: center;
  gap: var(--sp-12);
  margin-top: var(--sp-12);
}

.lesson-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: var(--sp-8) var(--sp-20);
  font-size: var(--fs-sm);
  font-weight: 600;
  color: #ffffff;
  background: var(--yt-gradient);
  border-radius: var(--r-full);
  text-decoration: none;
  transition: transform var(--dur-fast) var(--ease-out);
}

.lesson-link:hover {
  transform: translateY(-1px);
  text-decoration: none;
}

.lesson-lock-msg {
  font-size: var(--fs-xs);
  color: var(--yt-muted);
  font-style: italic;
}

/* Academy complete screen */
.academy-complete-screen {
  text-align: center;
  padding: var(--sp-48) var(--sp-16);
  background: var(--yt-surface);
  border-radius: var(--r-xl);
  box-shadow: var(--shadow-card);
}

.academy-complete-screen h2 {
  font-size: var(--fs-2xl);
  margin-bottom: var(--sp-12);
  background: var(--yt-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.academy-complete-screen p {
  color: var(--yt-muted);
  max-width: 400px;
  margin: 0 auto var(--sp-24);
}


/* ------------------------------------------------------------
   10. PORTFOLIO SCREEN
   ------------------------------------------------------------ */
.portfolio-header {
  text-align: center;
  padding: var(--sp-32) 0 var(--sp-24);
}

.portfolio-header h1 {
  margin-bottom: var(--sp-8);
}

.portfolio-header p {
  color: var(--yt-muted);
  max-width: 480px;
  margin: 0 auto;
}

/* Featured publication card */
.pub-card {
  background: var(--yt-surface);
  border-radius: var(--r-xl);
  padding: var(--sp-32);
  box-shadow: var(--shadow-raised);
  margin-bottom: var(--sp-32);
  border-top: 4px solid;
  border-image: var(--yt-gradient) 1;
}

.pub-card-label {
  display: inline-block;
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--yt-cyan);
  background: rgba(47, 210, 255, 0.08);
  padding: var(--sp-4) var(--sp-12);
  border-radius: var(--r-full);
  margin-bottom: var(--sp-16);
}

.pub-card-title {
  font-size: var(--fs-xl);
  font-weight: 700;
  color: var(--yt-text);
  margin-bottom: var(--sp-12);
  line-height: 1.3;
}

.pub-card-desc {
  font-size: var(--fs-base);
  color: var(--yt-body);
  line-height: 1.6;
  margin-bottom: var(--sp-16);
}

.pub-card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-8) var(--sp-16);
  font-size: var(--fs-sm);
  color: var(--yt-muted);
  margin-bottom: var(--sp-20);
}

.pub-card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-12);
}

/* Researcher profile card */
.researcher-card {
  background: var(--yt-surface);
  border-radius: var(--r-xl);
  padding: var(--sp-24);
  box-shadow: var(--shadow-card);
  margin-bottom: var(--sp-32);
  display: flex;
  flex-direction: column;
  gap: var(--sp-16);
}

.researcher-name {
  font-size: var(--fs-xl);
  font-weight: 700;
  color: var(--yt-text);
}

.researcher-role {
  font-size: var(--fs-sm);
  color: var(--yt-muted);
  font-weight: 500;
}

.researcher-bio {
  font-size: var(--fs-base);
  color: var(--yt-body);
  line-height: 1.6;
}

.researcher-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-12);
}

.researcher-links a {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-4);
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--yt-indigo);
}

/* Research list */
.research-list {
  display: flex;
  flex-direction: column;
  gap: var(--sp-12);
  margin-bottom: var(--sp-32);
}

.research-item {
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
  background: var(--yt-surface);
  border-radius: var(--r-lg);
  padding: var(--sp-16) var(--sp-20);
  box-shadow: var(--shadow-card);
  text-decoration: none;
  color: inherit;
  transition: box-shadow var(--dur-normal) var(--ease-out),
              transform var(--dur-fast) var(--ease-out);
}

.research-item:hover {
  box-shadow: var(--shadow-raised);
  transform: translateY(-1px);
  text-decoration: none;
}

.research-item .kicker {
  margin-bottom: var(--sp-2);
}

.research-item h3 {
  font-size: var(--fs-sm);
  font-weight: 600;
  line-height: 1.4;
}

.research-item-action {
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--yt-cyan);
  margin-top: var(--sp-4);
}


/* ------------------------------------------------------------
   11. SUPPORT SCREEN
   ------------------------------------------------------------ */
.support-hero {
  text-align: center;
  padding: var(--sp-48) 0 var(--sp-32);
}

.support-hero h1 {
  font-size: var(--fs-3xl);
  margin-bottom: var(--sp-12);
}

.support-hero p {
  font-size: var(--fs-base);
  color: var(--yt-muted);
  max-width: 480px;
  margin: 0 auto;
}

.support-copy {
  font-size: var(--fs-base);
  color: var(--yt-body);
  line-height: 1.7;
  margin-bottom: var(--sp-32);
  max-width: 600px;
}

/* Credibility cards */
.credibility-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-16);
  margin-bottom: var(--sp-32);
}

.cred-card {
  background: var(--yt-surface);
  border-radius: var(--r-lg);
  padding: var(--sp-20);
  box-shadow: var(--shadow-card);
}

.cred-card-title {
  font-size: var(--fs-base);
  font-weight: 700;
  color: var(--yt-text);
  margin-bottom: var(--sp-8);
}

.cred-card-desc {
  font-size: var(--fs-sm);
  color: var(--yt-body);
  line-height: 1.5;
}

/* Support priorities */
.support-priorities {
  margin-bottom: var(--sp-32);
}

.support-priorities h2 {
  margin-bottom: var(--sp-16);
}

.priority-item {
  display: flex;
  align-items: flex-start;
  gap: var(--sp-12);
  padding: var(--sp-12) 0;
  border-bottom: 1px solid var(--yt-line);
  font-size: var(--fs-base);
  color: var(--yt-body);
}

.priority-item:last-child {
  border-bottom: none;
}

/* Support CTA section */
.support-cta-section {
  text-align: center;
  padding: var(--sp-40) var(--sp-16);
  background: var(--yt-gradient-soft);
  border-radius: var(--r-xl);
  margin-bottom: var(--sp-32);
}

.support-cta-section h2 {
  margin-bottom: var(--sp-12);
}

.support-cta-section p {
  color: var(--yt-muted);
  margin-bottom: var(--sp-24);
  max-width: 420px;
  margin-left: auto;
  margin-right: auto;
}

.support-cta-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: var(--sp-12) var(--sp-40);
  font-size: var(--fs-lg);
  font-weight: 700;
  color: #ffffff;
  background: var(--yt-gradient);
  border: none;
  border-radius: var(--r-full);
  cursor: pointer;
  text-decoration: none;
  transition: transform var(--dur-fast) var(--ease-out),
              box-shadow var(--dur-fast) var(--ease-out);
}

.support-cta-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-raised);
  text-decoration: none;
}

/* Support methods (payment links) */
.support-methods {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-16);
  margin-bottom: var(--sp-32);
}

.support-method {
  display: flex;
  align-items: center;
  gap: var(--sp-16);
  background: var(--yt-surface);
  border-radius: var(--r-lg);
  padding: var(--sp-16) var(--sp-20);
  box-shadow: var(--shadow-card);
  text-decoration: none;
  color: inherit;
  transition: box-shadow var(--dur-normal) var(--ease-out),
              transform var(--dur-fast) var(--ease-out);
}

.support-method:hover {
  box-shadow: var(--shadow-raised);
  transform: translateY(-1px);
  text-decoration: none;
}

.support-method-img {
  width: 48px;
  height: 48px;
  border-radius: var(--r-md);
  object-fit: contain;
  background: var(--yt-gradient-soft);
  padding: var(--sp-8);
}

.support-method div {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}

.support-method strong {
  font-size: var(--fs-base);
}

.support-method span {
  font-size: var(--fs-sm);
  color: var(--yt-muted);
}

.support-closing {
  text-align: center;
  font-size: var(--fs-sm);
  color: var(--yt-muted);
  padding: var(--sp-24) 0 var(--sp-16);
  border-top: 1px solid var(--yt-line);
}

.support-email-link {
  display: inline-block;
  font-weight: 600;
  color: var(--yt-indigo);
  text-decoration: none;
  margin-top: var(--sp-8);
}

.support-email-link:hover {
  text-decoration: underline;
}


/* ------------------------------------------------------------
   12. BLUEPRINT BACKGROUND PATTERN
   ------------------------------------------------------------ */
.screen-container {
  background-image:
    linear-gradient(rgba(47, 210, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(47, 210, 255, 0.03) 1px, transparent 1px);
  background-size: 32px 32px;
}


/* ------------------------------------------------------------
   13. RESPONSIVE — SMALL PHONES (≤600px)
   ------------------------------------------------------------ */
@media (max-width: 600px) {
  :root {
    --fs-3xl: 1.875rem;
    --fs-2xl: 1.5rem;
    --fs-xl: 1.25rem;
    --gutter: 16px;
  }

  .home-hero h1 {
    font-size: var(--fs-2xl);
  }

  .pub-card {
    padding: var(--sp-20);
  }

  .pub-card-title {
    font-size: var(--fs-lg);
  }

  .journey-stage {
    width: 34px;
    height: 34px;
    font-size: var(--fs-xs);
  }

  .lesson-badge {
    width: 40px;
    height: 40px;
    font-size: var(--fs-base);
  }

  .support-cta-section {
    padding: var(--sp-24) var(--sp-16);
  }
}


/* ------------------------------------------------------------
   14. RESPONSIVE — TABLET (≥768px)
   ------------------------------------------------------------ */
@media (min-width: 768px) {
  :root {
    --gutter: 24px;
    --fs-3xl: 2.5rem;
  }

  .home-cards {
    grid-template-columns: repeat(2, 1fr);
  }

  .credibility-cards {
    grid-template-columns: repeat(2, 1fr);
  }

  .support-methods {
    grid-template-columns: repeat(2, 1fr);
  }

  .researcher-card {
    flex-direction: row;
    align-items: center;
  }

  .journey-stage {
    width: 48px;
    height: 48px;
    font-size: var(--fs-base);
  }
}


/* ------------------------------------------------------------
   15. RESPONSIVE — DESKTOP (≥1024px)
   ------------------------------------------------------------ */
@media (min-width: 1024px) {
  :root {
    --gutter: 32px;
    --nav-height: 68px;
  }

  .site-nav {
    top: 0;
    bottom: auto;
    border-top: none;
    border-bottom: 1px solid var(--yt-line);
    box-shadow: 0 2px 12px rgba(16, 35, 63, 0.04);
  }

  .screen-container {
    padding-top: calc(var(--nav-height) + var(--sp-16));
    padding-bottom: var(--sp-48);
  }

  .screen {
    max-width: var(--content-max);
    margin: 0 auto;
  }

  .home-cards {
    grid-template-columns: repeat(3, 1fr);
  }

  .credibility-cards {
    grid-template-columns: repeat(3, 1fr);
  }

  .support-methods {
    grid-template-columns: repeat(3, 1fr);
  }

  .nav-btn {
    flex-direction: row;
    gap: var(--sp-8);
    padding: var(--sp-8) var(--sp-16);
  }
}


/* ------------------------------------------------------------
   16. REDUCED MOTION
   ------------------------------------------------------------ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .splash-overlay {
    transition: none;
  }

  .splash-enter-btn:hover,
  .btn-primary:hover,
  .lesson-link:hover,
  .support-cta-btn:hover {
    transform: none;
  }
}


/* ------------------------------------------------------------
   17. PRINT
   ------------------------------------------------------------ */
@media print {
  .site-nav,
  .splash-overlay {
    display: none !important;
  }

  .screen-container {
    padding: 0;
    background-image: none;
  }

  .screen {
    display: block !important;
  }

  body {
    background: #ffffff;
    color: #000000;
  }
}