/* ==========================================================================
   ATELIER IA — Design system
   Direction : Dark mode moderne, couleurs vives, glassmorphism, animations fluides
   ========================================================================== */

:root {
  /* Base palette - dark electric */
  --bg-deep: #0A0B14;
  --bg-base: #0F1120;
  --bg-elev: #161A2E;
  --bg-card: rgba(22, 26, 46, 0.6);
  --bg-card-hover: rgba(28, 33, 56, 0.8);
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.15);
  
  /* Text */
  --text: #F5F5F7;
  --text-soft: #B4B8C5;
  --text-faded: #6B7080;
  
  /* Sophie - warm vibrant (orange / coral / pink) */
  --sophie-1: #FF6B6B;
  --sophie-2: #FFA94D;
  --sophie-3: #FFD93D;
  --sophie-glow: rgba(255, 107, 107, 0.35);
  --sophie-grad: linear-gradient(135deg, #FF6B6B 0%, #FFA94D 50%, #FFD93D 100%);
  
  /* Jordan - electric tech (purple / cyan / mint) */
  --jordan-1: #8B5CF6;
  --jordan-2: #06B6D4;
  --jordan-3: #10F2C5;
  --jordan-glow: rgba(139, 92, 246, 0.4);
  --jordan-grad: linear-gradient(135deg, #8B5CF6 0%, #06B6D4 50%, #10F2C5 100%);
  
  /* Universal accents */
  --success: #10F2C5;
  --warning: #FFD93D;
  --danger: #FF4757;
  
  /* Effects */
  --blur-strong: blur(40px);
  --blur-soft: blur(20px);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 24px 60px rgba(0, 0, 0, 0.5);
  --shadow-glow-sophie: 0 8px 40px var(--sophie-glow);
  --shadow-glow-jordan: 0 8px 40px var(--jordan-glow);
  
  /* Spacing & radius */
  --r-sm: 8px;
  --r-md: 14px;
  --r-lg: 20px;
  --r-xl: 28px;
  
  /* Easing */
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ==========================================================================
   RESET & BASE
   ========================================================================== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-deep);
  color: var(--text);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}
.mono { font-family: 'JetBrains Mono', monospace; font-feature-settings: "calt" 1; }

/* ==========================================================================
   ANIMATED BACKGROUND
   ========================================================================== */
.bg-gradient {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  background: var(--bg-deep);
}
.gradient-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.4;
  animation: float 20s ease-in-out infinite;
}
.blob-1 {
  width: 600px; height: 600px;
  background: radial-gradient(circle, #8B5CF6 0%, transparent 70%);
  top: -200px; left: -200px;
  animation-delay: 0s;
}
.blob-2 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, #06B6D4 0%, transparent 70%);
  top: 30%; right: -150px;
  animation-delay: -7s;
}
.blob-3 {
  width: 700px; height: 700px;
  background: radial-gradient(circle, #FF6B6B 0%, transparent 70%);
  bottom: -300px; left: 30%;
  animation-delay: -14s;
}
@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(40px, -40px) scale(1.1); }
  66% { transform: translate(-30px, 30px) scale(0.9); }
}

/* Grain overlay */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.03;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ==========================================================================
   HEADER
   ========================================================================== */
header#app-header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  background: rgba(10, 11, 20, 0.7);
  backdrop-filter: var(--blur-soft);
  -webkit-backdrop-filter: var(--blur-soft);
  border-bottom: 1px solid var(--border);
}
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  user-select: none;
}
.logo-mark {
  width: 38px; height: 38px;
  background: var(--jordan-grad);
  border-radius: var(--r-sm);
  display: grid; place-items: center;
  color: white;
  box-shadow: 0 4px 16px rgba(139, 92, 246, 0.4);
  transition: transform 0.3s var(--ease);
}
.logo:hover .logo-mark { transform: rotate(-12deg) scale(1.05); }
.logo-text { display: flex; flex-direction: column; line-height: 1.1; }
.logo-title { font-size: 16px; font-weight: 700; letter-spacing: -0.02em; }
.logo-sub {
  font-size: 11px; color: var(--text-faded); letter-spacing: 0.08em;
  text-transform: uppercase; font-weight: 500;
}

.header-user {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 6px 6px 6px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 100px;
  backdrop-filter: var(--blur-soft);
}
.header-user.hidden { display: none; }
.user-avatar {
  width: 30px; height: 30px;
  border-radius: 50%;
  display: grid; place-items: center;
  font-weight: 600; font-size: 13px;
  color: white;
}
.user-avatar.sophie { background: var(--sophie-grad); }
.user-avatar.jordan { background: var(--jordan-grad); }
.user-name { font-size: 13px; font-weight: 500; }
.logout-btn {
  width: 30px; height: 30px;
  border-radius: 50%;
  background: transparent;
  border: none;
  color: var(--text-faded);
  cursor: pointer;
  display: grid; place-items: center;
  transition: all 0.2s;
}
.logout-btn:hover { color: var(--text); background: rgba(255, 255, 255, 0.06); }

/* ==========================================================================
   LOADING
   ========================================================================== */
.loading {
  min-height: 60vh;
  display: grid;
  place-items: center;
}
.spinner {
  width: 40px; height: 40px;
  border: 2px solid var(--border);
  border-top-color: var(--jordan-1);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ==========================================================================
   ONBOARDING / LOGIN
   ========================================================================== */
.view {
  animation: fadeUp 0.5s var(--ease-out);
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

.onboarding {
  max-width: 1200px;
  margin: 0 auto;
  padding: 60px 24px 100px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-faded);
  margin-bottom: 20px;
  padding: 6px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 100px;
}
.eyebrow::before {
  content: '';
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 12px var(--success);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.4; } }

.hero-title {
  font-size: clamp(44px, 8vw, 88px);
  line-height: 0.98;
  font-weight: 800;
  letter-spacing: -0.04em;
  margin-bottom: 28px;
  max-width: 900px;
}
.hero-title .grad-jordan {
  background: var(--jordan-grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-style: italic;
  font-weight: 400;
}
.hero-title .grad-sophie {
  background: var(--sophie-grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-style: italic;
  font-weight: 400;
}

.hero-sub {
  font-size: 18px;
  color: var(--text-soft);
  max-width: 620px;
  margin-bottom: 64px;
  font-weight: 400;
}

.profile-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 48px;
}
@media (max-width: 760px) { .profile-grid { grid-template-columns: 1fr; } }

.profile-card {
  position: relative;
  padding: 36px 32px;
  background: var(--bg-card);
  backdrop-filter: var(--blur-soft);
  -webkit-backdrop-filter: var(--blur-soft);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  cursor: pointer;
  transition: all 0.4s var(--ease);
  overflow: hidden;
}
.profile-card::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1px;
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.4s var(--ease);
}
.profile-card.sophie::before { background: var(--sophie-grad); }
.profile-card.jordan::before { background: var(--jordan-grad); }
.profile-card:hover {
  transform: translateY(-6px);
  background: var(--bg-card-hover);
}
.profile-card.sophie:hover { box-shadow: var(--shadow-glow-sophie); }
.profile-card.jordan:hover { box-shadow: var(--shadow-glow-jordan); }
.profile-card:hover::before { opacity: 1; }

.profile-card .glow {
  position: absolute;
  width: 200px; height: 200px;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.5;
  pointer-events: none;
  top: -60px; right: -60px;
}
.profile-card.sophie .glow { background: var(--sophie-1); }
.profile-card.jordan .glow { background: var(--jordan-1); }

.pavatar {
  width: 60px; height: 60px;
  border-radius: 50%;
  display: grid; place-items: center;
  font-size: 26px; font-weight: 700;
  color: white;
  margin-bottom: 24px;
  position: relative;
  z-index: 1;
}
.profile-card.sophie .pavatar { background: var(--sophie-grad); box-shadow: 0 8px 24px var(--sophie-glow); }
.profile-card.jordan .pavatar { background: var(--jordan-grad); box-shadow: 0 8px 24px var(--jordan-glow); }

.pname {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 4px;
  position: relative; z-index: 1;
}
.ptag {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-faded);
  margin-bottom: 18px;
  position: relative; z-index: 1;
}
.pdesc {
  font-size: 14px;
  color: var(--text-soft);
  line-height: 1.6;
  margin-bottom: 24px;
  position: relative; z-index: 1;
}
.pstats {
  display: flex;
  gap: 20px;
  padding: 16px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  margin-bottom: 24px;
  position: relative; z-index: 1;
}
.pstat .num {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: var(--text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.profile-card.sophie .pstat .num {
  background: var(--sophie-grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.profile-card.jordan .pstat .num {
  background: var(--jordan-grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.pstat .lbl {
  font-size: 10px;
  color: var(--text-faded);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-top: 4px;
  font-weight: 500;
}
.pcta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  position: relative; z-index: 1;
}
.profile-card.sophie .pcta { color: var(--sophie-2); }
.profile-card.jordan .pcta { color: var(--jordan-3); }
.pcta .arrow { transition: transform 0.3s var(--ease); }
.profile-card:hover .pcta .arrow { transform: translateX(6px); }

.login-input {
  width: 100%;
  padding: 14px 18px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  color: var(--text);
  font-size: 15px;
  margin-bottom: 12px;
  font-family: inherit;
  transition: all 0.2s;
}
.login-input:focus {
  outline: none;
  border-color: var(--jordan-1);
  background: var(--bg-card-hover);
}

/* ==========================================================================
   DASHBOARD
   ========================================================================== */
.dash {
  max-width: 1280px;
  margin: 0 auto;
  padding: 40px 24px 100px;
}
.dash-head {
  margin-bottom: 32px;
}
.dash-greet {
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 8px;
}
.dash-greet em {
  font-style: italic;
  font-weight: 400;
}
.sophie-mode .dash-greet em {
  background: var(--sophie-grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.jordan-mode .dash-greet em {
  background: var(--jordan-grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.dash-meta {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--text-faded);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* Progress hero */
.prog-hero {
  position: relative;
  padding: 32px;
  background: var(--bg-card);
  backdrop-filter: var(--blur-soft);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  margin-bottom: 40px;
  overflow: hidden;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: center;
}
.prog-hero::before {
  content: '';
  position: absolute;
  width: 300px; height: 300px;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.3;
  top: -100px; right: -100px;
  pointer-events: none;
}
.sophie-mode .prog-hero::before { background: var(--sophie-1); }
.jordan-mode .prog-hero::before { background: var(--jordan-1); }
@media (max-width: 700px) { .prog-hero { grid-template-columns: 1fr; } }
.prog-info { position: relative; z-index: 1; }
.prog-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-faded);
  margin-bottom: 8px;
}
.prog-title {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 18px;
  letter-spacing: -0.01em;
}
.prog-bar {
  width: 100%;
  height: 8px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 100px;
  overflow: hidden;
  position: relative;
}
.prog-fill {
  height: 100%;
  border-radius: 100px;
  transition: width 1s var(--ease);
  position: relative;
}
.sophie-mode .prog-fill { background: var(--sophie-grad); box-shadow: 0 0 20px var(--sophie-glow); }
.jordan-mode .prog-fill { background: var(--jordan-grad); box-shadow: 0 0 20px var(--jordan-glow); }
.prog-fill::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
  animation: shimmer 2s infinite;
}
@keyframes shimmer { to { transform: translateX(200%); } }

.prog-stats {
  display: flex;
  gap: 28px;
  position: relative; z-index: 1;
}
.prog-stat { text-align: center; }
.prog-stat .num {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1;
}
.sophie-mode .prog-stat .num {
  background: var(--sophie-grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.jordan-mode .prog-stat .num {
  background: var(--jordan-grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.prog-stat .lbl {
  font-size: 10px;
  color: var(--text-faded);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-top: 6px;
  font-weight: 500;
}

/* Section title */
.section-title {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin: 40px 0 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}
.section-title h2 {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.section-title .meta {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--text-faded);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/* Now-playing card */
.now {
  position: relative;
  padding: 28px 32px;
  background: var(--bg-card);
  backdrop-filter: var(--blur-soft);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  margin-bottom: 12px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: center;
  overflow: hidden;
  cursor: pointer;
  transition: all 0.3s var(--ease);
}
.now:hover {
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}
.sophie-mode .now:hover { box-shadow: var(--shadow-glow-sophie); }
.jordan-mode .now:hover { box-shadow: var(--shadow-glow-jordan); }
@media (max-width: 700px) { .now { grid-template-columns: 1fr; } }

.now-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: 100px;
  margin-bottom: 14px;
}
.sophie-mode .now-tag {
  background: rgba(255, 107, 107, 0.12);
  color: var(--sophie-2);
  border: 1px solid rgba(255, 107, 107, 0.2);
}
.jordan-mode .now-tag {
  background: rgba(139, 92, 246, 0.12);
  color: var(--jordan-3);
  border: 1px solid rgba(139, 92, 246, 0.2);
}
.now-tag::before {
  content: '';
  width: 6px; height: 6px;
  border-radius: 50%;
  animation: pulse 1.5s infinite;
}
.sophie-mode .now-tag::before { background: var(--sophie-2); box-shadow: 0 0 8px var(--sophie-2); }
.jordan-mode .now-tag::before { background: var(--jordan-3); box-shadow: 0 0 8px var(--jordan-3); }

.now-title {
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
  line-height: 1.2;
}
.now-desc {
  color: var(--text-soft);
  font-size: 14px;
  margin-bottom: 16px;
  line-height: 1.5;
}
.now-meta {
  display: flex;
  gap: 16px;
  font-size: 12px;
  color: var(--text-faded);
  flex-wrap: wrap;
}
.now-meta span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border: none;
  border-radius: 100px;
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s var(--ease);
  white-space: nowrap;
  text-decoration: none;
}
.btn-primary {
  color: white;
  position: relative;
  overflow: hidden;
}
.sophie-mode .btn-primary { background: var(--sophie-grad); box-shadow: 0 4px 16px var(--sophie-glow); }
.jordan-mode .btn-primary { background: var(--jordan-grad); box-shadow: 0 4px 16px var(--jordan-glow); }
.btn-primary:hover { transform: translateY(-2px) scale(1.02); }
.btn-ghost {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text);
  backdrop-filter: var(--blur-soft);
}
.btn-ghost:hover { border-color: var(--border-strong); background: var(--bg-card-hover); }

/* Modules grid */
.mod-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
}
.mod {
  position: relative;
  padding: 22px 24px;
  background: var(--bg-card);
  backdrop-filter: var(--blur-soft);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  cursor: pointer;
  transition: all 0.3s var(--ease);
  overflow: hidden;
}
.mod:hover {
  background: var(--bg-card-hover);
  transform: translateY(-3px);
  border-color: var(--border-strong);
}
.mod-num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--text-faded);
  margin-bottom: 10px;
  font-weight: 500;
}
.mod-title {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
  line-height: 1.3;
}
.mod-desc {
  font-size: 13px;
  color: var(--text-soft);
  line-height: 1.55;
  margin-bottom: 16px;
}
.mod-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid var(--border);
  font-size: 11px;
  color: var(--text-faded);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 500;
}
.mod-status { display: flex; align-items: center; gap: 6px; }
.status-dot { width: 8px; height: 8px; border-radius: 50%; }
.status-dot.done { background: var(--success); box-shadow: 0 0 8px var(--success); }
.status-dot.current { animation: pulse 1.5s infinite; }
.sophie-mode .status-dot.current { background: var(--sophie-2); box-shadow: 0 0 8px var(--sophie-2); }
.jordan-mode .status-dot.current { background: var(--jordan-3); box-shadow: 0 0 8px var(--jordan-3); }
.status-dot.todo { background: rgba(255, 255, 255, 0.15); }

.mod.locked { opacity: 0.5; }
.mod.locked:hover { transform: none; border-color: var(--border); }

.mod.capstone {
  grid-column: 1 / -1;
  background: linear-gradient(135deg, var(--bg-card), rgba(139, 92, 246, 0.1));
  border-color: rgba(139, 92, 246, 0.2);
}
.mod.capstone .mod-num {
  background: var(--jordan-grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 700;
}

/* ==========================================================================
   LESSON VIEW
   ========================================================================== */
.lesson {
  max-width: 780px;
  margin: 0 auto;
  padding: 32px 24px 100px;
}
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-faded);
  cursor: pointer;
  margin-bottom: 24px;
  background: none;
  border: none;
  font-family: inherit;
  transition: color 0.2s;
}
.back-link:hover { color: var(--text); }

.lesson-meta {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.meta-pill {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 5px 12px;
  border-radius: 100px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-soft);
  font-weight: 500;
}
.meta-pill.highlight {
  border-color: rgba(139, 92, 246, 0.3);
  background: rgba(139, 92, 246, 0.1);
  color: var(--jordan-3);
}

.lesson-title {
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin-bottom: 20px;
}
.lesson-intro {
  font-size: 18px;
  color: var(--text-soft);
  margin-bottom: 36px;
  max-width: 640px;
  line-height: 1.6;
}

.timer-bar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 22px;
  background: var(--bg-card);
  backdrop-filter: var(--blur-soft);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  margin-bottom: 40px;
}
.timer-icon {
  width: 40px; height: 40px;
  border-radius: 50%;
  display: grid; place-items: center;
  font-size: 18px;
}
.sophie-mode .timer-icon { background: var(--sophie-grad); }
.jordan-mode .timer-icon { background: var(--jordan-grad); }
.timer-info { flex: 1; }
.timer-info strong {
  display: block;
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 2px;
}
.timer-info span {
  font-size: 12px;
  color: var(--text-faded);
}

.lesson-section { margin-bottom: 36px; }
.lesson-section h3 {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.section-icon {
  width: 32px; height: 32px;
  border-radius: 10px;
  display: grid; place-items: center;
  font-size: 16px;
}
.sophie-mode .section-icon {
  background: rgba(255, 107, 107, 0.15);
  border: 1px solid rgba(255, 107, 107, 0.25);
}
.jordan-mode .section-icon {
  background: rgba(139, 92, 246, 0.15);
  border: 1px solid rgba(139, 92, 246, 0.25);
}
.lesson-section p {
  font-size: 15px;
  color: var(--text-soft);
  margin-bottom: 14px;
  line-height: 1.7;
}
.lesson-section p strong { color: var(--text); font-weight: 600; }

.callout {
  position: relative;
  padding: 18px 22px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  margin: 18px 0;
  border-left: 3px solid var(--sophie-2);
}
.jordan-mode .callout { border-left-color: var(--jordan-3); }
.callout strong {
  display: block;
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 4px;
  color: var(--text);
}
.callout p {
  font-size: 14px;
  color: var(--text-soft);
  margin: 0;
}

pre.code {
  background: #060812;
  color: #C4F0E0;
  padding: 18px 22px;
  border-radius: var(--r-md);
  border: 1px solid var(--border);
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  overflow-x: auto;
  margin: 16px 0;
  line-height: 1.7;
}

.checklist { list-style: none; padding: 0; }
.checklist li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
  color: var(--text-soft);
  cursor: pointer;
  transition: color 0.2s;
}
.checklist li:hover { color: var(--text); }
.checklist li::before {
  content: '';
  width: 18px; height: 18px;
  border: 1.5px solid var(--text-faded);
  border-radius: 6px;
  flex-shrink: 0;
  margin-top: 1px;
  transition: all 0.2s;
}
.checklist li.checked::before {
  background: var(--success);
  border-color: var(--success);
  box-shadow: 0 0 8px var(--success);
}
.checklist li.checked { color: var(--text-faded); text-decoration: line-through; }

.resource-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  margin: 10px 0;
  text-decoration: none;
  color: var(--text);
  transition: all 0.2s var(--ease);
}
.resource-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-strong);
  transform: translateX(4px);
}
.res-icon {
  width: 40px; height: 40px;
  background: var(--bg-elev);
  border-radius: 10px;
  display: grid; place-items: center;
  font-size: 18px;
  flex-shrink: 0;
}
.res-meta strong { display: block; font-size: 14px; font-weight: 600; margin-bottom: 2px; }
.res-meta span { font-size: 12px; color: var(--text-faded); }

.lesson-end {
  margin-top: 56px;
  padding: 32px;
  background: var(--bg-card);
  backdrop-filter: var(--blur-soft);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.lesson-end::before {
  content: '';
  position: absolute;
  width: 200px; height: 200px;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.4;
  top: -80px; left: 50%;
  transform: translateX(-50%);
  pointer-events: none;
}
.sophie-mode .lesson-end::before { background: var(--sophie-1); }
.jordan-mode .lesson-end::before { background: var(--jordan-1); }
.lesson-end h4 {
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
  position: relative; z-index: 1;
}
.lesson-end p {
  color: var(--text-soft);
  font-size: 14px;
  margin-bottom: 22px;
  position: relative; z-index: 1;
}
.lesson-end .btn { position: relative; z-index: 1; }

/* ==========================================================================
   TOAST
   ========================================================================== */
#toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.toast {
  padding: 14px 20px;
  background: var(--bg-elev);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-md);
  color: var(--text);
  font-size: 14px;
  box-shadow: var(--shadow-lg);
  animation: slideIn 0.3s var(--ease-out);
  max-width: 320px;
}
.toast.success { border-left: 3px solid var(--success); }
.toast.error { border-left: 3px solid var(--danger); }
@keyframes slideIn { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

/* ==========================================================================
   UTILITIES
   ========================================================================== */
.hidden { display: none !important; }