/* ===========================
   CYBERFLASH — style.css
   Dark Cyberpunk Aesthetic
   =========================== */

/* --- FONTS & VARIABLES --- */
:root {
  --bg: #090c14;
  --bg2: #0d1117;
  --bg3: #111827;
  --surface: rgba(13, 20, 35, 0.85);
  --surface2: rgba(20, 30, 55, 0.7);
  --border: rgba(0, 200, 255, 0.15);
  --border2: rgba(0, 200, 255, 0.3);
  --neon: #00c8ff;
  --neon2: #7c3aed;
  --neon3: #00ff9d;
  --neon4: #ff3e6c;
  --text: #e2e8f0;
  --text2: #94a3b8;
  --text3: #64748b;
  --card-bg: rgba(10, 18, 35, 0.9);
  --card-hover: rgba(0, 200, 255, 0.06);
  --glow: 0 0 20px rgba(0, 200, 255, 0.3);
  --glow2: 0 0 30px rgba(124, 58, 237, 0.3);
  --radius: 12px;
  --radius2: 8px;
  --font-main: 'Exo 2', sans-serif;
  --font-mono: 'Share Tech Mono', monospace;
  --font-ui: 'Rajdhani', sans-serif;
}

[data-theme="light"] {
  --bg: #f0f4ff;
  --bg2: #e8edf8;
  --bg3: #dde4f5;
  --surface: rgba(240, 244, 255, 0.92);
  --surface2: rgba(220, 230, 255, 0.7);
  --border: rgba(100, 120, 220, 0.2);
  --border2: rgba(100, 120, 220, 0.4);
  --neon: #2563eb;
  --neon2: #7c3aed;
  --neon3: #059669;
  --neon4: #dc2626;
  --text: #1e293b;
  --text2: #475569;
  --text3: #94a3b8;
  --card-bg: rgba(255, 255, 255, 0.9);
  --card-hover: rgba(37, 99, 235, 0.05);
  --glow: 0 4px 20px rgba(37, 99, 235, 0.15);
  --glow2: 0 4px 20px rgba(124, 58, 237, 0.15);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-main);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
  transition: background 0.4s, color 0.4s;
}

.mono { font-family: var(--font-mono); }

/* --- CANVAS BACKGROUND --- */
#bg-canvas {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: 0;
  pointer-events: none;
  opacity: 0.5;
}

/* --- LOADING SCREEN --- */
#loading-screen {
  position: fixed;
  inset: 0;
  background: #05080f;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.6s;
}

#loading-screen.fade-out { opacity: 0; pointer-events: none; }

.loader-box {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

.loader-ring {
  width: 80px;
  height: 80px;
  border: 3px solid rgba(0, 200, 255, 0.1);
  border-top-color: #00c8ff;
  border-right-color: #7c3aed;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

.loader-text {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #00c8ff;
  font-size: 14px;
  letter-spacing: 3px;
}

.loader-dots span {
  display: inline-block;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: #00c8ff;
  animation: blink 1.2s infinite;
}
.loader-dots span:nth-child(2) { animation-delay: 0.2s; }
.loader-dots span:nth-child(3) { animation-delay: 0.4s; }
@keyframes blink { 0%, 80%, 100% { opacity: 0.2; } 40% { opacity: 1; } }

.loader-status {
  font-size: 12px;
  color: var(--neon3);
  opacity: 0.7;
  letter-spacing: 1px;
}

/* --- NAV --- */
#top-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  height: 60px;
  background: rgba(9, 12, 20, 0.9);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

[data-theme="light"] #top-nav {
  background: rgba(240, 244, 255, 0.92);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-family: var(--font-ui);
  font-weight: 700;
  font-size: 20px;
  color: var(--neon);
  letter-spacing: 1px;
}

.brand-icon { font-size: 22px; }

.nav-links {
  display: flex;
  gap: 4px;
}

.nav-btn {
  background: none;
  border: none;
  color: var(--text2);
  font-family: var(--font-ui);
  font-size: 15px;
  font-weight: 500;
  padding: 6px 14px;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s;
  letter-spacing: 0.5px;
}

.nav-btn:hover, .nav-btn.active {
  color: var(--neon);
  background: rgba(0, 200, 255, 0.08);
}

.nav-actions { display: flex; gap: 8px; }

.icon-btn {
  background: none;
  border: 1px solid var(--border);
  border-radius: 8px;
  width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  font-size: 16px;
  transition: all 0.2s;
  color: var(--text2);
}

.icon-btn:hover {
  border-color: var(--neon);
  background: rgba(0, 200, 255, 0.08);
}

.hamburger {
  display: none;
  background: none;
  border: none;
  color: var(--text);
  font-size: 22px;
  cursor: pointer;
}

/* Mobile Menu */
#mobile-menu {
  position: fixed;
  top: 60px; left: 0; right: 0;
  z-index: 99;
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 8px 0;
}

#mobile-menu button {
  background: none;
  border: none;
  color: var(--text);
  font-family: var(--font-ui);
  font-size: 16px;
  padding: 12px 24px;
  text-align: left;
  cursor: pointer;
  transition: all 0.2s;
}

#mobile-menu button:hover { color: var(--neon); background: var(--card-hover); }

/* --- MAIN / PAGES --- */
#app {
  position: relative;
  z-index: 1;
  min-height: 100vh;
}

.page { display: none; }
.page.active { display: block; }
.hidden { display: none !important; }

/* --- HERO PAGE --- */
#page-hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 80px 60px 40px;
  gap: 60px;
  max-width: 1200px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-block;
  font-size: 12px;
  color: var(--neon3);
  letter-spacing: 2px;
  margin-bottom: 20px;
  padding: 4px 12px;
  border: 1px solid rgba(0, 255, 157, 0.2);
  border-radius: 4px;
  background: rgba(0, 255, 157, 0.04);
}

.hero-title {
  font-family: var(--font-ui);
  font-size: clamp(52px, 7vw, 90px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -1px;
  margin-bottom: 12px;
  background: linear-gradient(135deg, #00c8ff 0%, #7c3aed 50%, #00ff9d 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Glitch effect */
.glitch {
  position: relative;
}
.glitch::before,
.glitch::after {
  content: attr(data-text);
  position: absolute;
  left: 0; top: 0;
  background: linear-gradient(135deg, #00c8ff 0%, #7c3aed 50%, #00ff9d 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.glitch::before {
  animation: glitch1 3s infinite;
  clip-path: polygon(0 0, 100% 0, 100% 40%, 0 40%);
  transform: translateX(-2px);
}
.glitch::after {
  animation: glitch2 3s infinite;
  clip-path: polygon(0 60%, 100% 60%, 100% 100%, 0 100%);
  transform: translateX(2px);
}
@keyframes glitch1 { 0%, 90%, 100% { opacity: 0; transform: translateX(-2px); } 91%, 95% { opacity: 0.8; transform: translateX(-4px); } }
@keyframes glitch2 { 0%, 90%, 100% { opacity: 0; transform: translateX(2px); } 93%, 97% { opacity: 0.8; transform: translateX(4px); } }

.hero-subtitle {
  font-family: var(--font-ui);
  font-size: clamp(18px, 2.5vw, 28px);
  font-weight: 500;
  color: var(--text2);
  letter-spacing: 2px;
  margin-bottom: 20px;
}

.hero-desc {
  font-size: 16px;
  color: var(--text2);
  line-height: 1.7;
  max-width: 500px;
  margin-bottom: 28px;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 36px;
}

.stat { text-align: center; }
.stat-num {
  display: block;
  font-family: var(--font-ui);
  font-size: 28px;
  font-weight: 700;
  color: var(--neon);
}
.stat-label {
  display: block;
  font-size: 12px;
  color: var(--text3);
  letter-spacing: 1px;
  text-transform: uppercase;
}
.stat-divider { width: 1px; height: 40px; background: var(--border2); }

.hero-btns { display: flex; gap: 14px; flex-wrap: wrap; }

/* Terminal Window */
.hero-visual { flex: 1; min-width: 300px; max-width: 480px; }

.terminal-window {
  background: rgba(5, 10, 20, 0.9);
  border: 1px solid rgba(0, 200, 255, 0.25);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), 0 0 40px rgba(0, 200, 255, 0.08);
}

.terminal-bar {
  background: rgba(20, 30, 50, 0.8);
  padding: 10px 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  border-bottom: 1px solid rgba(0, 200, 255, 0.1);
}

.t-dot {
  width: 12px; height: 12px;
  border-radius: 50%;
  display: inline-block;
}
.t-dot.red { background: #ff5f57; }
.t-dot.yellow { background: #febc2e; }
.t-dot.green { background: #28c840; }

.t-title {
  flex: 1;
  text-align: center;
  font-size: 12px;
  color: var(--text3);
}

.terminal-body {
  padding: 20px;
  min-height: 280px;
  font-size: 13px;
  line-height: 1.8;
  color: #00c8ff;
}

.terminal-body .t-cmd { color: #00ff9d; }
.terminal-body .t-out { color: #94a3b8; }
.terminal-body .t-warn { color: #fbbf24; }
.terminal-body .t-cursor {
  display: inline-block;
  width: 8px; height: 14px;
  background: #00c8ff;
  animation: cursor-blink 1s infinite;
  vertical-align: text-bottom;
  margin-left: 2px;
}
@keyframes cursor-blink { 0%, 49% { opacity: 1; } 50%, 100% { opacity: 0; } }

/* --- BUTTONS --- */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, var(--neon), var(--neon2));
  color: #fff;
  border: none;
  padding: 12px 28px;
  border-radius: var(--radius2);
  font-family: var(--font-ui);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  letter-spacing: 0.5px;
  transition: all 0.3s;
  box-shadow: 0 4px 20px rgba(0, 200, 255, 0.25);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 200, 255, 0.4);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--neon);
  border: 1px solid var(--neon);
  padding: 12px 28px;
  border-radius: var(--radius2);
  font-family: var(--font-ui);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  letter-spacing: 0.5px;
  transition: all 0.3s;
}

.btn-secondary:hover {
  background: rgba(0, 200, 255, 0.1);
  transform: translateY(-2px);
}

.btn-danger {
  background: rgba(255, 62, 108, 0.1);
  color: var(--neon4);
  border: 1px solid rgba(255, 62, 108, 0.3);
  padding: 10px 22px;
  border-radius: var(--radius2);
  font-family: var(--font-ui);
  font-size: 15px;
  cursor: pointer;
  transition: all 0.2s;
}
.btn-danger:hover {
  background: rgba(255, 62, 108, 0.2);
  border-color: var(--neon4);
}

/* --- PAGE STRUCTURE --- */
.page-header {
  text-align: center;
  padding: 100px 24px 40px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  position: relative;
}

.page-title {
  font-family: var(--font-ui);
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.5px;
}

.page-sub {
  color: var(--text3);
  font-size: 16px;
  letter-spacing: 0.5px;
}

.back-btn {
  position: absolute;
  left: 24px;
  top: 100px;
  background: none;
  border: 1px solid var(--border);
  color: var(--text2);
  padding: 8px 16px;
  border-radius: var(--radius2);
  cursor: pointer;
  font-family: var(--font-ui);
  font-size: 14px;
  transition: all 0.2s;
}
.back-btn:hover { color: var(--neon); border-color: var(--neon); }

/* --- DOMAINS --- */
.domains-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  padding: 0 40px 60px;
  max-width: 1100px;
  margin: 0 auto;
}

.domain-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px 28px;
  cursor: pointer;
  transition: all 0.3s;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(20px);
}

.domain-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--neon), var(--neon2));
  opacity: 0;
  transition: opacity 0.3s;
}

.domain-card:hover {
  border-color: var(--neon);
  transform: translateY(-6px);
  box-shadow: var(--glow), 0 20px 40px rgba(0, 0, 0, 0.3);
  background: var(--card-hover);
}

.domain-card:hover::before { opacity: 1; }

.domain-icon { font-size: 48px; margin-bottom: 16px; display: block; }
.domain-name {
  font-family: var(--font-ui);
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}
.domain-desc {
  font-size: 14px;
  color: var(--text2);
  line-height: 1.6;
  margin-bottom: 20px;
}

.domain-progress-wrap { margin-bottom: 16px; }
.domain-progress-label {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text3);
  margin-bottom: 6px;
  font-family: var(--font-mono);
}

.progress-bar {
  height: 4px;
  background: rgba(255,255,255,0.08);
  border-radius: 4px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--neon), var(--neon2));
  border-radius: 4px;
  transition: width 0.6s ease;
}

.domain-start-btn {
  width: 100%;
  background: linear-gradient(135deg, rgba(0,200,255,0.1), rgba(124,58,237,0.1));
  border: 1px solid var(--border2);
  color: var(--neon);
  padding: 10px;
  border-radius: var(--radius2);
  font-family: var(--font-ui);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  letter-spacing: 0.5px;
}
.domain-start-btn:hover {
  background: linear-gradient(135deg, rgba(0,200,255,0.2), rgba(124,58,237,0.2));
  border-color: var(--neon);
}

/* --- LEVELS --- */
.levels-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  padding: 0 40px 60px;
  max-width: 1000px;
  margin: 0 auto;
}

.level-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px;
  cursor: pointer;
  transition: all 0.3s;
  backdrop-filter: blur(20px);
  position: relative;
  overflow: hidden;
}

.level-card:hover {
  border-color: var(--border2);
  transform: translateY(-4px);
  box-shadow: var(--glow), 0 16px 32px rgba(0, 0, 0, 0.3);
}

.level-badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 1px;
  margin-bottom: 12px;
}

.badge-basic { background: rgba(0, 255, 157, 0.1); color: var(--neon3); border: 1px solid rgba(0,255,157,0.3); }
.badge-moderate { background: rgba(0, 200, 255, 0.1); color: var(--neon); border: 1px solid rgba(0,200,255,0.3); }
.badge-advanced { background: rgba(124, 58, 237, 0.1); color: #a78bfa; border: 1px solid rgba(124,58,237,0.3); }

.level-name {
  font-family: var(--font-ui);
  font-size: 24px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 6px;
}
.level-count {
  font-size: 13px;
  color: var(--text3);
  margin-bottom: 20px;
  font-family: var(--font-mono);
}

.level-progress-label {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text3);
  margin-bottom: 6px;
  font-family: var(--font-mono);
}

.level-start-btn {
  width: 100%;
  margin-top: 20px;
  padding: 11px;
  border-radius: var(--radius2);
  font-family: var(--font-ui);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  letter-spacing: 0.5px;
}

.level-btn-start {
  background: linear-gradient(135deg, var(--neon), var(--neon2));
  border: none;
  color: #fff;
  box-shadow: 0 4px 16px rgba(0,200,255,0.2);
}
.level-btn-start:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,200,255,0.35); }

.level-btn-resume {
  background: transparent;
  border: 1px solid var(--neon3);
  color: var(--neon3);
}
.level-btn-resume:hover { background: rgba(0,255,157,0.08); }

.level-btn-completed {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text3);
  cursor: default;
}

/* --- FLASHCARD --- */
#page-flashcard {
  min-height: 100vh;
  padding-top: 60px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.fc-header {
  width: 100%;
  max-width: 800px;
  padding: 20px 24px 10px;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.fc-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 1;
  font-size: 13px;
  color: var(--text2);
}

.fc-progress-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: var(--text3);
}

.fc-progress-bar {
  width: 120px;
  height: 4px;
  background: rgba(255,255,255,0.08);
  border-radius: 4px;
  overflow: hidden;
}

.fc-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--neon), var(--neon2));
  border-radius: 4px;
  transition: width 0.4s ease;
}

.fc-stage {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 30px 24px;
  width: 100%;
  min-height: 380px;
}

/* 3D Flashcard */
.flashcard {
  width: 100%;
  max-width: 680px;
  height: 360px;
  perspective: 1200px;
  cursor: pointer;
}

.card-inner {
  width: 100%;
  height: 100%;
  position: relative;
  transform-style: preserve-3d;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.card-inner.flipped { transform: rotateY(180deg); }

.card-face {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  border-radius: 20px;
  padding: 40px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  background: var(--card-bg);
  border: 1px solid var(--border);
  backdrop-filter: blur(30px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4), inset 0 1px 0 rgba(255,255,255,0.05);
}

.card-front {
  background: linear-gradient(135deg, rgba(10, 18, 35, 0.95), rgba(15, 25, 50, 0.95));
  border-color: rgba(0, 200, 255, 0.2);
}

.card-back {
  transform: rotateY(180deg);
  background: linear-gradient(135deg, rgba(10, 18, 40, 0.95), rgba(20, 12, 45, 0.95));
  border-color: rgba(124, 58, 237, 0.3);
}

.card-label {
  font-size: 11px;
  letter-spacing: 3px;
  color: var(--text3);
  margin-bottom: 24px;
  text-transform: uppercase;
}

.card-front .card-label { color: rgba(0,200,255,0.6); }
.card-back .card-label { color: rgba(124,58,237,0.8); }

.card-text {
  font-size: 18px;
  line-height: 1.65;
  color: var(--text);
  max-width: 560px;
}

.card-front .card-text {
  font-size: 20px;
  font-family: var(--font-ui);
  font-weight: 500;
}

.card-hint {
  font-size: 11px;
  color: var(--text3);
  margin-top: 24px;
  letter-spacing: 1px;
}

/* FC Controls */
.fc-controls {
  display: flex;
  gap: 16px;
  align-items: center;
  padding: 0 24px 16px;
}

.ctrl-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius2);
  font-family: var(--font-ui);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text2);
}

.ctrl-btn:hover { border-color: var(--neon); color: var(--neon); background: rgba(0,200,255,0.06); }
.ctrl-btn:disabled { opacity: 0.3; cursor: not-allowed; }

.ctrl-flip {
  background: linear-gradient(135deg, rgba(0,200,255,0.12), rgba(124,58,237,0.12));
  border-color: var(--border2);
  color: var(--neon);
  font-size: 16px;
  padding: 12px 32px;
}
.ctrl-flip:hover { background: linear-gradient(135deg, rgba(0,200,255,0.22), rgba(124,58,237,0.22)); }

.fc-keyboard-hint {
  font-size: 11px;
  color: var(--text3);
  padding-bottom: 20px;
  letter-spacing: 1px;
}

/* --- FC COMPLETE --- */
#page-fc-complete {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 24px 40px;
}

.complete-box {
  text-align: center;
  max-width: 480px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 48px 40px;
  backdrop-filter: blur(30px);
  box-shadow: var(--glow), 0 30px 60px rgba(0,0,0,0.4);
}

.complete-icon { font-size: 64px; margin-bottom: 20px; }

.complete-box h2 {
  font-family: var(--font-ui);
  font-size: 36px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--neon), var(--neon2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 8px;
}

.complete-sub { color: var(--text3); margin-bottom: 32px; font-size: 15px; }

.complete-stats {
  display: flex;
  gap: 24px;
  justify-content: center;
  margin-bottom: 36px;
}
.cstat { text-align: center; }
.cstat-val {
  display: block;
  font-family: var(--font-ui);
  font-size: 30px;
  font-weight: 700;
  color: var(--neon);
}
.cstat-label {
  font-size: 12px;
  color: var(--text3);
  letter-spacing: 1px;
  text-transform: uppercase;
}

.complete-btns { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

/* --- RAPID FIRE --- */
#page-rapid-fire {
  min-height: 100vh;
  padding: 60px 24px 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}

#rf-timer-select {
  width: 100%;
  max-width: 700px;
  text-align: center;
}

.rf-select-box {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 40px;
  backdrop-filter: blur(20px);
}

.rf-select-box h3 {
  font-family: var(--font-ui);
  font-size: 20px;
  color: var(--text2);
  margin-bottom: 24px;
  font-weight: 500;
}

.timer-options {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.timer-opt {
  background: var(--surface2);
  border: 2px solid var(--border);
  border-radius: 16px;
  padding: 24px 16px;
  cursor: pointer;
  transition: all 0.25s;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.timer-opt:hover, .timer-opt.active {
  border-color: var(--neon);
  background: rgba(0,200,255,0.08);
  transform: translateY(-4px);
  box-shadow: var(--glow);
}

.t-num {
  font-family: var(--font-ui);
  font-size: 36px;
  font-weight: 800;
  color: var(--neon);
  line-height: 1;
}
.t-unit {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text3);
  letter-spacing: 2px;
}
.t-desc {
  font-size: 12px;
  color: var(--text2);
  margin-top: 4px;
}

/* RF Game */
#rf-game {
  width: 100%;
  max-width: 720px;
}

.rf-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.rf-score-display {
  display: flex;
  flex-direction: column;
  align-items: center;
}
.rf-score-display span:first-child { font-size: 11px; color: var(--text3); letter-spacing: 2px; }
.rf-score {
  font-family: var(--font-ui);
  font-size: 42px;
  font-weight: 800;
  color: var(--neon);
  line-height: 1;
}

.rf-timer-wrap {
  position: relative;
  width: 80px; height: 80px;
}
.rf-timer-svg { position: absolute; top: 0; left: 0; width: 80px; height: 80px; transform: rotate(-90deg); }
.timer-track { fill: none; stroke: rgba(255,255,255,0.08); stroke-width: 6; }
.timer-fill {
  fill: none;
  stroke: var(--neon);
  stroke-width: 6;
  stroke-linecap: round;
  stroke-dasharray: 220;
  stroke-dashoffset: 0;
  transition: stroke-dashoffset 1s linear, stroke 0.5s;
}
.timer-fill.warning { stroke: #fbbf24; }
.timer-fill.danger { stroke: var(--neon4); }

.rf-timer-num {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
}

.rf-qcount {
  font-size: 14px;
  color: var(--text2);
  letter-spacing: 1px;
}

.rf-progress-bar {
  height: 3px;
  background: rgba(255,255,255,0.06);
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: 24px;
}
.rf-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--neon3), var(--neon));
  border-radius: 3px;
  transition: width 0.4s ease;
}

.rf-question-box {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px;
  margin-bottom: 20px;
  text-align: center;
  backdrop-filter: blur(20px);
  min-height: 140px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.rf-domain-tag {
  font-size: 11px;
  color: var(--text3);
  letter-spacing: 2px;
  text-transform: uppercase;
}

.rf-question {
  font-family: var(--font-ui);
  font-size: 20px;
  font-weight: 500;
  color: var(--text);
  line-height: 1.5;
}

.rf-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.rf-option {
  background: var(--surface2);
  border: 2px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  cursor: pointer;
  transition: all 0.2s;
  font-family: var(--font-ui);
  font-size: 15px;
  color: var(--text);
  text-align: center;
  line-height: 1.4;
}

.rf-option:hover:not(.answered) {
  border-color: var(--neon);
  background: rgba(0,200,255,0.08);
}

.rf-option.correct {
  border-color: var(--neon3);
  background: rgba(0,255,157,0.12);
  color: var(--neon3);
}

.rf-option.wrong {
  border-color: var(--neon4);
  background: rgba(255,62,108,0.12);
  color: var(--neon4);
}

/* Results */
#rf-results {
  width: 100%;
  display: flex;
  justify-content: center;
}

.results-box {
  text-align: center;
  max-width: 480px;
  width: 100%;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 48px 36px;
  backdrop-filter: blur(30px);
  box-shadow: var(--glow), 0 30px 60px rgba(0,0,0,0.4);
}

.results-trophy { font-size: 72px; margin-bottom: 16px; animation: pop 0.5s ease; }
@keyframes pop { 0% { transform: scale(0); } 70% { transform: scale(1.15); } 100% { transform: scale(1); } }

.results-box h2 {
  font-family: var(--font-ui);
  font-size: 32px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 12px;
}

.results-score-big {
  font-family: var(--font-ui);
  font-size: 72px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--neon), var(--neon2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}

.results-label {
  font-size: 12px;
  color: var(--text3);
  letter-spacing: 3px;
  margin-bottom: 28px;
}

.results-stats {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-bottom: 16px;
}

.rstat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 14px 20px;
  border-radius: 10px;
  min-width: 80px;
}
.rstat span:first-child {
  font-family: var(--font-ui);
  font-size: 28px;
  font-weight: 700;
}
.rstat span:last-child { font-size: 12px; color: var(--text3); }
.rstat.correct { background: rgba(0,255,157,0.08); border: 1px solid rgba(0,255,157,0.2); }
.rstat.correct span:first-child { color: var(--neon3); }
.rstat.wrong { background: rgba(255,62,108,0.08); border: 1px solid rgba(255,62,108,0.2); }
.rstat.wrong span:first-child { color: var(--neon4); }
.rstat.skipped { background: rgba(255,255,255,0.04); border: 1px solid var(--border); }
.rstat.skipped span:first-child { color: var(--text2); }

.results-acc {
  font-size: 14px;
  color: var(--text2);
  margin-bottom: 28px;
  letter-spacing: 1px;
}

.results-btns { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

/* --- DASHBOARD --- */
#page-dashboard { padding-bottom: 60px; }

.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  padding: 0 40px;
  max-width: 1100px;
  margin: 0 auto;
}

.dash-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px;
  backdrop-filter: blur(20px);
}

.dash-card-title {
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 600;
  color: var(--text3);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.dash-big-num {
  font-family: var(--font-ui);
  font-size: 48px;
  font-weight: 800;
  color: var(--neon);
  line-height: 1;
  margin-bottom: 4px;
}

.dash-sub { font-size: 13px; color: var(--text3); }

.dash-domain-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.dash-domain-icon { font-size: 20px; width: 28px; text-align: center; }

.dash-domain-name {
  font-size: 14px;
  color: var(--text2);
  flex: 1;
  font-family: var(--font-ui);
  font-weight: 500;
}

.dash-domain-pct {
  font-size: 13px;
  color: var(--neon);
  font-family: var(--font-mono);
}

.motivational {
  grid-column: 1 / -1;
  background: linear-gradient(135deg, rgba(0,200,255,0.08), rgba(124,58,237,0.08));
  border: 1px solid var(--border2);
  border-radius: 16px;
  padding: 28px;
  text-align: center;
}

.motivational p {
  font-family: var(--font-ui);
  font-size: 20px;
  font-weight: 500;
  color: var(--text);
  line-height: 1.5;
}

/* --- ACHIEVEMENTS --- */
#page-achievements { padding-bottom: 60px; }

.badges-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  padding: 0 40px;
  max-width: 1000px;
  margin: 0 auto;
}

.badge-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px 20px;
  text-align: center;
  transition: all 0.3s;
  backdrop-filter: blur(20px);
  position: relative;
  overflow: hidden;
}

.badge-card.unlocked {
  border-color: var(--neon);
  box-shadow: var(--glow);
}

.badge-card.locked { opacity: 0.5; filter: grayscale(0.5); }

.badge-icon { font-size: 48px; margin-bottom: 12px; display: block; }
.badge-name {
  font-family: var(--font-ui);
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 6px;
}
.badge-desc { font-size: 12px; color: var(--text3); line-height: 1.5; margin-bottom: 12px; }
.badge-status {
  font-size: 11px;
  letter-spacing: 2px;
  font-family: var(--font-mono);
}
.badge-status.unlocked-text { color: var(--neon3); }
.badge-status.locked-text { color: var(--text3); }

/* Badge Popup */
#badge-popup {
  position: fixed;
  bottom: 30px;
  right: 30px;
  z-index: 1000;
  animation: slideIn 0.4s ease;
}

@keyframes slideIn { from { transform: translateX(120%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

.badge-popup-inner {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--card-bg);
  border: 1px solid var(--neon);
  border-radius: 14px;
  padding: 16px 24px;
  box-shadow: var(--glow), 0 10px 40px rgba(0,0,0,0.4);
  backdrop-filter: blur(20px);
}

.badge-popup-icon { font-size: 36px; }

.badge-popup-text {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.badge-popup-text span:first-child {
  font-size: 10px;
  color: var(--neon3);
  letter-spacing: 2px;
}

#badge-popup-name {
  font-family: var(--font-ui);
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
}

/* --- SETTINGS --- */
#page-settings { padding-bottom: 60px; }

.settings-box {
  max-width: 600px;
  margin: 0 auto 40px;
  padding: 0 24px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.setting-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px 24px;
  backdrop-filter: blur(20px);
}

.setting-row.danger { border-color: rgba(255,62,108,0.2); }

.setting-info { display: flex; flex-direction: column; gap: 4px; }
.setting-label {
  font-family: var(--font-ui);
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
}
.setting-desc { font-size: 13px; color: var(--text3); }

/* Toggle Switch */
.toggle-switch { position: relative; display: inline-block; width: 52px; height: 28px; }
.toggle-switch input { opacity: 0; width: 0; height: 0; }
.toggle-slider {
  position: absolute;
  cursor: pointer;
  inset: 0;
  background: rgba(255,255,255,0.1);
  border-radius: 28px;
  transition: 0.3s;
  border: 1px solid var(--border);
}
.toggle-slider::before {
  content: '';
  position: absolute;
  height: 20px; width: 20px;
  left: 3px; bottom: 3px;
  background: var(--text3);
  border-radius: 50%;
  transition: 0.3s;
}
input:checked + .toggle-slider { background: rgba(0,200,255,0.15); border-color: var(--neon); }
input:checked + .toggle-slider::before { transform: translateX(24px); background: var(--neon); }

/* --- ABOUT --- */
#page-about { padding-bottom: 60px; }

.about-content {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 40px;
}

.about-hero {
  text-align: center;
  padding: 100px 0 40px;
}
.about-icon { font-size: 64px; margin-bottom: 16px; display: block; }
.about-hero h2 {
  font-family: var(--font-ui);
  font-size: 40px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}
.about-tagline { color: var(--text3); font-size: 16px; }

.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin-bottom: 40px;
}

.about-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px;
  backdrop-filter: blur(20px);
  transition: all 0.3s;
}

.about-card:hover {
  border-color: var(--border2);
  transform: translateY(-3px);
  box-shadow: var(--glow);
}

.about-card-icon { font-size: 32px; margin-bottom: 14px; }

.about-card h3 {
  font-family: var(--font-ui);
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 10px;
}

.about-card p { font-size: 14px; color: var(--text2); line-height: 1.65; }

/* --- FOOTER --- */
#site-footer {
  position: relative;
  z-index: 1;
  background: rgba(9, 12, 20, 0.95);
  border-top: 1px solid var(--border);
  padding: 40px 40px 24px;
}

[data-theme="light"] #site-footer {
  background: rgba(230, 236, 255, 0.95);
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 2fr 1fr;
  gap: 40px;
  align-items: start;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 20px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-family: var(--font-ui);
  font-size: 20px;
  font-weight: 700;
  color: var(--neon);
  display: flex;
  align-items: flex-start;
}

.footer-tagline { font-size: 13px; color: var(--text3); font-weight: 400; margin-top: 4px; }

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
}
.footer-links a {
  color: var(--text2);
  text-decoration: none;
  font-size: 14px;
  cursor: pointer;
  transition: color 0.2s;
}
.footer-links a:hover { color: var(--neon); }

.footer-social { display: flex; gap: 12px; }
.social-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px; height: 38px;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text2);
  text-decoration: none;
  transition: all 0.2s;
}
.social-icon:hover { border-color: var(--neon); color: var(--neon); background: rgba(0,200,255,0.08); }

.footer-copy {
  grid-column: 1 / -1;
  text-align: center;
  font-size: 12px;
  color: var(--text3);
  letter-spacing: 1px;
}

/* --- RESPONSIVE --- */
@media (max-width: 900px) {
  #page-hero {
    flex-direction: column;
    padding: 80px 24px 40px;
    text-align: center;
  }
  .hero-desc, .hero-stats { margin-left: auto; margin-right: auto; }
  .hero-btns { justify-content: center; }
  .hero-visual { width: 100%; max-width: 100%; }
  .nav-links { display: none; }
  .hamburger { display: block; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 600px) {
  .domains-grid, .levels-grid, .badges-grid, .dashboard-grid { padding: 0 16px 40px; }
  .timer-options { grid-template-columns: repeat(2, 1fr); }
  .rf-options { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; }
  .about-content, .settings-box { padding: 0 16px; }
  .flashcard { height: 300px; }
  .card-face { padding: 28px 20px; }
  .card-text { font-size: 16px; }
  .card-front .card-text { font-size: 17px; }
  .results-stats { flex-wrap: wrap; }
  .complete-stats { flex-wrap: wrap; gap: 12px; }
}