/* ============================================
   PYQUEST — STYLES.CSS
   Dark futuristic theme for teen Python learners
   ============================================ */

/* --- CSS VARIABLES --- */
:root {
  --bg-base:       #0D0D1A;
  --bg-card:       #12121F;
  --bg-card-hover: #1A1A2E;
  --bg-elevated:   #16162A;
  --border:        rgba(255,255,255,0.07);
  --border-bright: rgba(0,245,255,0.25);

  --cyan:    #00F5FF;
  --cyan-dim: rgba(0,245,255,0.15);
  --green:   #39FF14;
  --green-dim: rgba(57,255,20,0.15);
  --purple:  #B44FFF;
  --purple-dim: rgba(180,79,255,0.15);
  --orange:  #FF6B2B;
  --orange-dim: rgba(255,107,43,0.15);
  --red:     #FF4757;

  --text-primary:   #F0F0FF;
  --text-secondary: #9090B0;
  --text-muted:     #5A5A7A;

  --font-display: 'Plus Jakarta Sans', sans-serif;
  --font-mono:    'Space Mono', monospace;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  --shadow-cyan:   0 0 30px rgba(0,245,255,0.15);
  --shadow-green:  0 0 30px rgba(57,255,20,0.15);
  --shadow-purple: 0 0 30px rgba(180,79,255,0.15);
  --shadow-card:   0 8px 32px rgba(0,0,0,0.4);

  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-display);
  background: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

::selection { background: var(--cyan); color: var(--bg-base); }

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-base); }
::-webkit-scrollbar-thumb { background: var(--cyan-dim); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--cyan); }

/* --- UTILITY --- */
.accent-cyan   { color: var(--cyan); }
.accent-green  { color: var(--green); }
.accent-purple { color: var(--purple); }
.accent-orange { color: var(--orange); }

/* --- NAVBAR --- */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(13,13,26,0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}
.navbar.scrolled {
  background: rgba(13,13,26,0.97);
  border-bottom-color: var(--border-bright);
}
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.5px;
}
.logo-icon { font-size: 1.5rem; }
.nav-links {
  display: flex;
  list-style: none;
  gap: 4px;
  margin-left: auto;
}
.nav-link {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.nav-link:hover {
  color: var(--cyan);
  background: var(--cyan-dim);
}
.nav-xp {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--cyan);
  white-space: nowrap;
}
.xp-icon { font-size: 1rem; }
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  margin-left: auto;
}
.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}
.mobile-menu {
  display: none;
  flex-direction: column;
  padding: 12px 24px 16px;
  gap: 4px;
  border-top: 1px solid var(--border);
}
.mobile-menu a {
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 600;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.mobile-menu a:hover { color: var(--cyan); background: var(--cyan-dim); }
.mobile-menu.open { display: flex; }

/* --- HERO --- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 100px 24px 60px;
  position: relative;
  overflow: hidden;
  max-width: 1200px;
  margin: 0 auto;
  gap: 60px;
}
.hero-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
}
.grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,245,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,245,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
}
.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.35;
  animation: orbFloat 8s ease-in-out infinite;
}
.orb-1 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, var(--cyan), transparent 70%);
  top: -150px; right: -100px;
  animation-delay: 0s;
}
.orb-2 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, var(--purple), transparent 70%);
  bottom: 0; left: -100px;
  animation-delay: -3s;
}
.orb-3 {
  width: 300px; height: 300px;
  background: radial-gradient(circle, var(--green), transparent 70%);
  top: 50%; left: 40%;
  animation-delay: -5s;
  opacity: 0.15;
}
@keyframes orbFloat {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-30px) scale(1.05); }
}

.hero-content { flex: 1; max-width: 580px; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--cyan-dim);
  border: 1px solid rgba(0,245,255,0.3);
  border-radius: 999px;
  padding: 6px 16px;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: 0.5px;
  text-transform: uppercase;
  margin-bottom: 24px;
  animation: fadeInUp 0.6s ease both;
}
.badge-dot {
  width: 7px; height: 7px;
  background: var(--cyan);
  border-radius: 50%;
  animation: pulse 2s ease infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.4); }
}

.hero-title {
  font-size: clamp(2.8rem, 6vw, 4.5rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -2px;
  margin-bottom: 20px;
  animation: fadeInUp 0.6s 0.1s ease both;
}
.title-gradient {
  background: linear-gradient(135deg, var(--cyan) 0%, var(--purple) 50%, var(--green) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-sub {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 32px;
  max-width: 480px;
  animation: fadeInUp 0.6s 0.2s ease both;
}
.hero-cta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 40px;
  animation: fadeInUp 0.6s 0.3s ease both;
}
.hero-stats {
  display: flex;
  align-items: center;
  gap: 24px;
  animation: fadeInUp 0.6s 0.4s ease both;
}
.stat { display: flex; flex-direction: column; }
.stat strong { font-size: 1.8rem; font-weight: 800; color: var(--cyan); line-height: 1; }
.stat span { font-size: 0.75rem; color: var(--text-muted); font-weight: 600; text-transform: uppercase; letter-spacing: 1px; }
.stat-divider { width: 1px; height: 36px; background: var(--border); }

/* --- BUTTONS --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--cyan), #0099CC);
  color: var(--bg-base);
  box-shadow: 0 0 20px rgba(0,245,255,0.3);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 35px rgba(0,245,255,0.5);
}
.btn-ghost {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border);
}
.btn-ghost:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  background: var(--cyan-dim);
}

/* --- HERO VISUAL / CODE WINDOW --- */
.hero-visual {
  flex: 1;
  max-width: 480px;
  animation: fadeInRight 0.8s 0.3s ease both;
}
.code-window {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card), var(--shadow-cyan);
}
.window-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
}
.dot {
  width: 12px; height: 12px;
  border-radius: 50%;
}
.dot.red    { background: #FF5F57; }
.dot.yellow { background: #FEBC2E; }
.dot.green  { background: #28C840; }
.window-title {
  margin-left: 8px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
}
.window-code {
  padding: 20px;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  line-height: 1.9;
}
.code-line { display: block; }
.kw  { color: var(--cyan); }
.str { color: var(--green); }
.cm  { color: var(--text-muted); font-style: italic; }
.punc { color: var(--text-secondary); }
.op  { color: var(--purple); }
.code-output {
  margin-top: 12px;
  padding: 12px;
  background: rgba(0,0,0,0.3);
  border-radius: var(--radius-sm);
  color: var(--green);
  font-size: 0.82rem;
  line-height: 1.8;
}
.output-arrow { color: var(--cyan); margin-right: 6px; }

/* --- XP BAR SECTION --- */
.xp-bar-section {
  background: var(--bg-elevated);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 16px 24px;
}
.xp-bar-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.xp-info { display: flex; flex-direction: column; min-width: 160px; }
.xp-title { font-size: 0.8rem; font-weight: 700; color: var(--cyan); text-transform: uppercase; letter-spacing: 1px; }
.xp-level { font-size: 0.75rem; color: var(--text-muted); }
.xp-track {
  flex: 1;
  height: 8px;
  background: var(--bg-card);
  border-radius: 999px;
  overflow: hidden;
  min-width: 100px;
  border: 1px solid var(--border);
}
.xp-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--cyan), var(--purple));
  border-radius: 999px;
  transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 0 10px var(--cyan);
}
.xp-count { font-size: 0.8rem; font-weight: 700; color: var(--text-secondary); white-space: nowrap; }

/* --- SECTION COMMON --- */
.lessons-section,
.editor-section,
.quiz-section,
.roadmap-section,
.tips-section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 80px 24px;
}
.section-header {
  text-align: center;
  margin-bottom: 56px;
}
.section-tag {
  display: inline-block;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 5px 16px;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 16px;
}
.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  letter-spacing: -1.5px;
  line-height: 1.1;
  margin-bottom: 12px;
}
.section-sub {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 520px;
  margin: 0 auto;
}

/* --- LESSONS GRID --- */
.lessons-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.lesson-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.lesson-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan), var(--purple));
  opacity: 0;
  transition: var(--transition);
}
.lesson-card:hover {
  border-color: var(--border-bright);
  background: var(--bg-card-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card), var(--shadow-cyan);
}
.lesson-card:hover::before { opacity: 1; }
.lesson-card.completed {
  border-color: rgba(57,255,20,0.3);
}
.lesson-card.completed::before {
  background: linear-gradient(90deg, var(--green), var(--cyan));
  opacity: 1;
}
.lesson-card.locked {
  opacity: 0.5;
  cursor: not-allowed;
}
.lesson-card.locked:hover {
  transform: none;
  box-shadow: none;
  border-color: var(--border);
}
.lesson-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 12px;
}
.lesson-icon { font-size: 2rem; }
.lesson-badge {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.badge-beginner  { background: var(--cyan-dim);   color: var(--cyan);   border: 1px solid rgba(0,245,255,0.3); }
.badge-intermediate { background: var(--purple-dim); color: var(--purple); border: 1px solid rgba(180,79,255,0.3); }
.badge-advanced  { background: var(--orange-dim); color: var(--orange); border: 1px solid rgba(255,107,43,0.3); }
.lesson-num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-bottom: 6px;
}
.lesson-title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-primary);
}
.lesson-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 16px;
}
.lesson-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.lesson-xp {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--cyan);
}
.lesson-status {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
}
.lesson-status.done { color: var(--green); }
.lesson-status.locked-txt { color: var(--text-muted); }

/* --- MODAL --- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.8);
  backdrop-filter: blur(8px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}
.modal-overlay.open {
  opacity: 1;
  pointer-events: all;
}
.modal-box {
  background: var(--bg-card);
  border: 1px solid var(--border-bright);
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 680px;
  max-height: 85vh;
  overflow-y: auto;
  padding: 32px;
  position: relative;
  box-shadow: var(--shadow-card), var(--shadow-cyan);
  transform: scale(0.95);
  transition: transform 0.3s ease;
}
.modal-overlay.open .modal-box { transform: scale(1); }
.modal-close {
  position: absolute;
  top: 16px; right: 16px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  width: 32px; height: 32px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 0.85rem;
  display: flex; align-items: center; justify-content: center;
  transition: var(--transition);
}
.modal-close:hover { color: var(--red); border-color: var(--red); }
.modal-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}
.modal-icon { font-size: 2.5rem; }
.modal-title { font-size: 1.4rem; font-weight: 800; letter-spacing: -0.5px; }
.modal-level {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--cyan);
  text-transform: uppercase;
  letter-spacing: 1px;
}
.modal-body { margin-bottom: 24px; }
.modal-body h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--cyan);
  margin: 20px 0 8px;
}
.modal-body p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 12px;
}
.modal-body ul {
  list-style: none;
  padding: 0;
  margin-bottom: 12px;
}
.modal-body ul li {
  font-size: 0.9rem;
  color: var(--text-secondary);
  padding: 4px 0 4px 20px;
  position: relative;
}
.modal-body ul li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--cyan);
}
.modal-code {
  background: var(--bg-base);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.8;
  color: var(--green);
  overflow-x: auto;
  margin: 12px 0;
  white-space: pre;
}
.modal-footer { border-top: 1px solid var(--border); padding-top: 20px; }

/* --- CODE EDITOR --- */
.editor-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  min-height: 420px;
}
.editor-panel, .output-panel {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.editor-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
  gap: 8px;
  flex-wrap: wrap;
}
.editor-filename {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-muted);
}
.editor-actions { display: flex; align-items: center; gap: 8px; }
.btn-tool {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  padding: 5px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  font-family: var(--font-display);
  transition: var(--transition);
}
.btn-tool:hover { border-color: var(--cyan); color: var(--cyan); }
.btn-run {
  background: linear-gradient(135deg, var(--green), #1A8A00);
  color: var(--bg-base);
  border: none;
  padding: 7px 18px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 800;
  cursor: pointer;
  font-family: var(--font-display);
  transition: var(--transition);
  box-shadow: 0 0 15px rgba(57,255,20,0.3);
}
.btn-run:hover {
  transform: translateY(-1px);
  box-shadow: 0 0 25px rgba(57,255,20,0.5);
}
.btn-run.running { opacity: 0.7; cursor: wait; }
.editor-challenges {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}
.challenge-label {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  white-space: nowrap;
}
.challenge-pills { display: flex; gap: 6px; flex-wrap: wrap; }
.challenge-pill {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}
.challenge-pill:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  background: var(--cyan-dim);
}
.code-editor {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  padding: 20px;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--green);
  resize: none;
  caret-color: var(--cyan);
  tab-size: 4;
}
.code-editor::placeholder { color: var(--text-muted); }
.output-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-secondary);
}
.output-display {
  flex: 1;
  padding: 20px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.8;
  color: var(--text-primary);
  overflow-y: auto;
  white-space: pre-wrap;
  word-break: break-word;
}
.output-placeholder { color: var(--text-muted); font-style: italic; }
.output-error { color: var(--red); }
.output-success { color: var(--green); }
.output-hint {
  padding: 12px 16px;
  background: var(--purple-dim);
  border-top: 1px solid rgba(180,79,255,0.2);
  font-size: 0.82rem;
  color: var(--purple);
  font-weight: 600;
}

/* --- QUIZ --- */
.quiz-container { max-width: 700px; margin: 0 auto; }
.quiz-topics {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-bottom: 32px;
}
.quiz-topic-btn {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  padding: 10px 20px;
  border-radius: var(--radius-md);
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 8px;
}
.quiz-topic-btn:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  background: var(--cyan-dim);
  transform: translateY(-2px);
}
.quiz-card {
  background: var(--bg-card);
  border: 1px solid var(--border-bright);
  border-radius: var(--radius-xl);
  padding: 32px;
  box-shadow: var(--shadow-card), var(--shadow-cyan);
}
.quiz-progress-bar {
  height: 4px;
  background: var(--bg-elevated);
  border-radius: 999px;
  margin-bottom: 20px;
  overflow: hidden;
}
.quiz-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--cyan), var(--purple));
  border-radius: 999px;
  transition: width 0.5s ease;
}
.quiz-meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 16px;
}
.quiz-question {
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 24px;
  color: var(--text-primary);
}
.quiz-options { display: flex; flex-direction: column; gap: 10px; margin-bottom: 16px; }
.quiz-option {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 14px 18px;
  border-radius: var(--radius-md);
  font-family: var(--font-display);
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  text-align: left;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 12px;
}
.quiz-option:hover:not(:disabled) {
  border-color: var(--cyan);
  background: var(--cyan-dim);
  color: var(--cyan);
}
.quiz-option.correct {
  border-color: var(--green);
  background: var(--green-dim);
  color: var(--green);
}
.quiz-option.wrong {
  border-color: var(--red);
  background: rgba(255,71,87,0.1);
  color: var(--red);
}
.quiz-option:disabled { cursor: not-allowed; }
.option-letter {
  width: 26px; height: 26px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.75rem;
  font-weight: 800;
  flex-shrink: 0;
}
.quiz-feedback {
  padding: 12px 16px;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 16px;
}
.quiz-feedback.correct-fb {
  background: var(--green-dim);
  border: 1px solid rgba(57,255,20,0.3);
  color: var(--green);
}
.quiz-feedback.wrong-fb {
  background: rgba(255,71,87,0.1);
  border: 1px solid rgba(255,71,87,0.3);
  color: var(--red);
}
.quiz-next-btn { width: 100%; justify-content: center; }
.quiz-result {
  text-align: center;
  padding: 40px 20px;
}
.result-emoji { font-size: 4rem; margin-bottom: 16px; }
.quiz-result h3 { font-size: 2rem; font-weight: 800; margin-bottom: 8px; }
.quiz-result p { color: var(--text-secondary); margin-bottom: 24px; font-size: 1rem; }

/* --- ROADMAP --- */
.roadmap-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}
.roadmap-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.roadmap-card::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 2px;
  opacity: 0;
  transition: var(--transition);
}
.roadmap-card[data-color="cyan"]::after   { background: var(--cyan); }
.roadmap-card[data-color="green"]::after  { background: var(--green); }
.roadmap-card[data-color="purple"]::after { background: var(--purple); }
.roadmap-card[data-color="orange"]::after { background: var(--orange); }
.roadmap-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-card); }
.roadmap-card:hover::after { opacity: 1; }
.roadmap-icon { font-size: 2.2rem; margin-bottom: 14px; }
.roadmap-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 10px; }
.roadmap-card p { font-size: 0.88rem; color: var(--text-secondary); line-height: 1.6; margin-bottom: 16px; }
.roadmap-tools { display: flex; flex-wrap: wrap; gap: 6px; }
.roadmap-tools span {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 700;
  font-family: var(--font-mono);
}

/* --- TIPS --- */
.tips-section { background: var(--bg-elevated); border-radius: var(--radius-xl); margin: 0 24px 80px; padding: 60px 40px; max-width: 1152px; }
.tips-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 24px;
}
.tip-card {
  padding: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: var(--transition);
}
.tip-card:hover { border-color: var(--border-bright); transform: translateY(-3px); }
.tip-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: 2px;
  display: block;
  margin-bottom: 10px;
}
.tip-card h4 { font-size: 1rem; font-weight: 700; margin-bottom: 8px; }
.tip-card p { font-size: 0.85rem; color: var(--text-secondary); line-height: 1.6; }

/* --- FOOTER --- */
.footer {
  background: var(--bg-elevated);
  border-top: 1px solid var(--border);
  padding: 40px 24px;
  text-align: center;
}
.footer-inner { max-width: 600px; margin: 0 auto; }
.footer-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 8px;
}
.footer-tagline { color: var(--text-muted); font-size: 0.85rem; margin-bottom: 20px; }
.footer-xp-summary {
  display: flex;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
}
.footer-xp-summary strong { color: var(--cyan); }
.footer-copy { font-size: 0.78rem; color: var(--text-muted); }

/* --- XP TOAST --- */
.xp-toast {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: linear-gradient(135deg, var(--bg-elevated), var(--bg-card));
  border: 1px solid var(--cyan);
  border-radius: var(--radius-md);
  padding: 12px 20px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--cyan);
  box-shadow: var(--shadow-cyan);
  z-index: 3000;
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}
.xp-toast.show {
  transform: translateY(0);
  opacity: 1;
}
.toast-icon { font-size: 1.2rem; }

/* --- ANIMATIONS --- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeInRight {
  from { opacity: 0; transform: translateX(40px); }
  to   { opacity: 1; transform: translateX(0); }
}
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- RESPONSIVE --- */
@media (max-width: 900px) {
  .hero {
    flex-direction: column;
    text-align: center;
    padding-top: 90px;
  }
  .hero-content { max-width: 100%; }
  .hero-cta { justify-content: center; }
  .hero-stats { justify-content: center; }
  .hero-visual { max-width: 100%; width: 100%; }
  .hero-sub { margin: 0 auto 32px; }
  .editor-container { grid-template-columns: 1fr; }
  .nav-links, .nav-xp { display: none; }
  .hamburger { display: flex; }
}
@media (max-width: 600px) {
  .hero-title { letter-spacing: -1px; }
  .lessons-grid { grid-template-columns: 1fr; }
  .roadmap-grid { grid-template-columns: 1fr; }
  .tips-grid { grid-template-columns: 1fr; }
  .tips-section { margin: 0 12px 60px; padding: 40px 20px; }
  .quiz-card { padding: 20px; }
  .modal-box { padding: 20px; }
  .xp-bar-inner { flex-direction: column; align-items: flex-start; gap: 8px; }
  .xp-track { width: 100%; }
}