/* ============================================================
   ChemBiza — Gameshow Theme Styles
   ============================================================ */

/* ---------- CSS Variables ---------- */
:root {
  --bg-deep: #060918;
  --bg-main: #0a0e27;
  --bg-surface: #111638;
  --bg-card: rgba(17, 22, 56, 0.85);
  --bg-glass: rgba(255, 255, 255, 0.04);

  --gold: #ffd700;
  --gold-dim: #b8960a;
  --gold-glow: rgba(255, 215, 0, 0.35);
  --cyan: #00e5ff;
  --cyan-dim: #0097a7;
  --cyan-glow: rgba(0, 229, 255, 0.25);

  --correct: #00ff88;
  --correct-glow: rgba(0, 255, 136, 0.3);
  --wrong: #ff3366;
  --wrong-glow: rgba(255, 51, 102, 0.3);

  --text-primary: #f0f0f8;
  --text-secondary: #8892b0;
  --text-dim: #4a5280;

  --font-display: 'Audiowide', cursive;
  --font-heading: 'Chakra Petch', sans-serif;
  --font-body: 'DM Sans', sans-serif;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;

  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms cubic-bezier(0.22, 1, 0.36, 1);

  /* Category colors */
  --cat-alkali-metal: #e84040;
  --cat-alkaline-earth-metal: #e88a30;
  --cat-transition-metal: #4a9bd9;
  --cat-post-transition-metal: #48a882;
  --cat-metalloid: #7cb342;
  --cat-nonmetal: #26c6da;
  --cat-halogen: #d4c030;
  --cat-noble-gas: #ab6dd6;
  --cat-lanthanide: #e070b0;
  --cat-actinide: #c060d0;
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  background: var(--bg-deep);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.5;
}

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

input {
  font-family: inherit;
  border: none;
  background: none;
  color: inherit;
  outline: none;
}

/* ---------- Animated Background ---------- */
.bg-layer {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}

.bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.015) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.015) 1px, transparent 1px);
  background-size: 60px 60px;
}

.bg-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.4;
  animation: bgFloat 20s ease-in-out infinite;
}

.bg-glow--1 {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--gold-glow) 0%, transparent 70%);
  top: -200px;
  right: -100px;
  animation-delay: -5s;
}

.bg-glow--2 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--cyan-glow) 0%, transparent 70%);
  bottom: -150px;
  left: -100px;
  animation-delay: -12s;
}

.bg-orb {
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.05);
  animation: orbFloat 15s ease-in-out infinite;
}

.bg-orb--1 {
  width: 300px;
  height: 300px;
  top: 20%;
  left: 10%;
  animation-duration: 18s;
}

.bg-orb--2 {
  width: 200px;
  height: 200px;
  top: 60%;
  right: 15%;
  animation-duration: 22s;
  animation-delay: -7s;
}

.bg-orb--3 {
  width: 150px;
  height: 150px;
  bottom: 10%;
  left: 40%;
  animation-duration: 14s;
  animation-delay: -3s;
}

@keyframes bgFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(40px, -30px) scale(1.05); }
  66% { transform: translate(-30px, 20px) scale(0.95); }
}

@keyframes orbFloat {
  0%, 100% { transform: translate(0, 0) rotate(0deg); opacity: 0.3; }
  50% { transform: translate(20px, -20px) rotate(180deg); opacity: 0.5; }
}

/* ---------- Screen Management ---------- */
.screen {
  position: fixed;
  inset: 0;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-slow), visibility var(--transition-slow);
  overflow-y: auto;
  padding: 20px;
}

.screen.active {
  opacity: 1;
  visibility: visible;
}

/* ============================================================
   TITLE SCREEN
   ============================================================ */
.title-content {
  text-align: center;
  max-width: 600px;
  animation: fadeInUp 0.8s ease-out;
}

/* Atom decoration */
.title-atom {
  position: relative;
  width: 120px;
  height: 120px;
  margin: 0 auto 40px;
}

.atom-nucleus {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 16px;
  height: 16px;
  background: var(--gold);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  box-shadow: 0 0 20px var(--gold-glow), 0 0 40px var(--gold-glow);
}

.atom-ring {
  position: absolute;
  top: 50%;
  left: 50%;
  border: 1.5px solid var(--gold-dim);
  border-radius: 50%;
  animation: atomSpin 6s linear infinite;
}

.atom-ring::after {
  content: '';
  position: absolute;
  width: 6px;
  height: 6px;
  background: var(--cyan);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--cyan);
  top: -3px;
  left: 50%;
  transform: translateX(-50%);
}

.atom-ring--1 {
  width: 100px;
  height: 40px;
  transform: translate(-50%, -50%) rotateZ(0deg);
  animation-duration: 4s;
}

.atom-ring--2 {
  width: 100px;
  height: 40px;
  transform: translate(-50%, -50%) rotateZ(60deg);
  animation-duration: 5s;
  animation-delay: -1s;
}

.atom-ring--3 {
  width: 100px;
  height: 40px;
  transform: translate(-50%, -50%) rotateZ(120deg);
  animation-duration: 6s;
  animation-delay: -2s;
}

@keyframes atomSpin {
  from { transform: translate(-50%, -50%) rotateZ(var(--ring-rotation, 0deg)) rotateY(0deg); }
  to { transform: translate(-50%, -50%) rotateZ(var(--ring-rotation, 0deg)) rotateY(360deg); }
}

.atom-ring--1 { --ring-rotation: 0deg; }
.atom-ring--2 { --ring-rotation: 60deg; }
.atom-ring--3 { --ring-rotation: 120deg; }

/* Logo */
.title-logo {
  font-family: var(--font-display);
  font-size: clamp(3rem, 10vw, 5.5rem);
  letter-spacing: 0.06em;
  line-height: 1;
  margin-bottom: 12px;
}

.title-logo__chem {
  color: var(--text-primary);
  text-shadow:
    0 0 20px rgba(240, 240, 248, 0.3),
    0 2px 4px rgba(0, 0, 0, 0.5);
}

.title-logo__biza {
  color: var(--gold);
  text-shadow:
    0 0 30px var(--gold-glow),
    0 0 60px var(--gold-glow),
    0 2px 4px rgba(0, 0, 0, 0.5);
}

.title-subtitle {
  font-family: var(--font-heading);
  font-size: clamp(0.75rem, 2.5vw, 1rem);
  font-weight: 600;
  letter-spacing: 0.35em;
  color: var(--cyan);
  text-transform: uppercase;
  margin-bottom: 32px;
}

.title-divider {
  width: 80px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
  margin: 0 auto 24px;
}

.title-desc {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 48px;
}

/* ---------- Buttons ---------- */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 16px 48px;
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: transform var(--transition-fast), box-shadow var(--transition-base);
}

.btn:active {
  transform: scale(0.97);
}

.btn--primary {
  background: linear-gradient(135deg, var(--gold), #ffaa00);
  color: #0a0e27;
}

.btn--primary:hover {
  box-shadow: 0 0 30px var(--gold-glow), 0 8px 32px rgba(0, 0, 0, 0.4);
  transform: translateY(-2px);
}

.btn--secondary {
  background: transparent;
  border: 2px solid var(--text-dim);
  color: var(--text-secondary);
}

.btn--secondary:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  box-shadow: 0 0 20px var(--cyan-glow);
  transform: translateY(-2px);
}

.btn--glow .btn__shine {
  position: absolute;
  top: 0;
  left: -100%;
  width: 60%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  animation: btnShine 3s ease-in-out infinite;
}

@keyframes btnShine {
  0% { left: -100%; }
  50%, 100% { left: 150%; }
}

/* ============================================================
   SELECTOR SCREEN
   ============================================================ */
.selector-content {
  width: 100%;
  max-width: 1200px;
  animation: fadeInUp 0.6s ease-out;
}

.selector-title {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 4vw, 2.2rem);
  text-align: center;
  color: var(--gold);
  text-shadow: 0 0 20px var(--gold-glow);
  margin-bottom: 6px;
}

.selector-hint {
  text-align: center;
  color: var(--text-dim);
  font-size: 0.9rem;
  margin-bottom: 20px;
}

/* Search Bar */
.search-bar {
  position: relative;
  max-width: 360px;
  margin: 0 auto 24px;
}

.search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  color: var(--text-dim);
  pointer-events: none;
}

#element-search {
  width: 100%;
  padding: 12px 16px 12px 42px;
  background: var(--bg-glass);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  color: var(--text-primary);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

#element-search::placeholder {
  color: var(--text-dim);
}

#element-search:focus {
  border-color: var(--cyan-dim);
  box-shadow: 0 0 16px var(--cyan-glow);
}

/* Periodic Table */
.table-wrapper {
  overflow-x: auto;
  padding-bottom: 12px;
  -webkit-overflow-scrolling: touch;
}

.periodic-table {
  display: grid;
  grid-template-columns: repeat(18, minmax(52px, 1fr));
  grid-template-rows: repeat(7, 52px) 20px repeat(2, 52px);
  gap: 3px;
  min-width: 960px;
  margin: 0 auto;
}

/* Element Cell */
.element-cell {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.06);
  cursor: pointer;
  position: relative;
  transition:
    transform var(--transition-fast),
    box-shadow var(--transition-base),
    border-color var(--transition-fast),
    background-color var(--transition-fast);
  padding: 2px;
  background: var(--cell-bg, rgba(255, 255, 255, 0.04));
}

.element-cell:hover {
  transform: scale(1.15) translateY(-3px);
  z-index: 10;
  border-color: var(--cell-color, var(--gold));
  box-shadow:
    0 0 16px var(--cell-glow, var(--gold-glow)),
    0 8px 20px rgba(0, 0, 0, 0.5);
}

.element-cell:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.element-cell .atomic-number {
  font-family: var(--font-body);
  font-size: 0.55rem;
  color: rgba(255, 255, 255, 0.5);
  line-height: 1;
}

.element-cell .symbol {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-primary);
}

.element-cell .el-name {
  font-family: var(--font-body);
  font-size: 0.42rem;
  color: rgba(255, 255, 255, 0.45);
  line-height: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 100%;
}

.element-cell.hidden {
  opacity: 0.1;
  pointer-events: none;
}

/* Lanthanide / Actinide labels */
.table-label {
  display: flex;
  align-items: center;
  font-family: var(--font-body);
  font-size: 0.55rem;
  color: var(--text-dim);
  letter-spacing: 0.04em;
  padding-left: 4px;
  white-space: nowrap;
}

/* Category Colors */
.category-alkali-metal {
  --cell-bg: rgba(232, 64, 64, 0.12);
  --cell-color: var(--cat-alkali-metal);
  --cell-glow: rgba(232, 64, 64, 0.35);
}
.category-alkaline-earth-metal {
  --cell-bg: rgba(232, 138, 48, 0.12);
  --cell-color: var(--cat-alkaline-earth-metal);
  --cell-glow: rgba(232, 138, 48, 0.35);
}
.category-transition-metal {
  --cell-bg: rgba(74, 155, 217, 0.12);
  --cell-color: var(--cat-transition-metal);
  --cell-glow: rgba(74, 155, 217, 0.35);
}
.category-post-transition-metal {
  --cell-bg: rgba(72, 168, 130, 0.12);
  --cell-color: var(--cat-post-transition-metal);
  --cell-glow: rgba(72, 168, 130, 0.35);
}
.category-metalloid {
  --cell-bg: rgba(124, 179, 66, 0.12);
  --cell-color: var(--cat-metalloid);
  --cell-glow: rgba(124, 179, 66, 0.35);
}
.category-nonmetal {
  --cell-bg: rgba(38, 198, 218, 0.12);
  --cell-color: var(--cat-nonmetal);
  --cell-glow: rgba(38, 198, 218, 0.35);
}
.category-halogen {
  --cell-bg: rgba(212, 192, 48, 0.12);
  --cell-color: var(--cat-halogen);
  --cell-glow: rgba(212, 192, 48, 0.35);
}
.category-noble-gas {
  --cell-bg: rgba(171, 109, 214, 0.12);
  --cell-color: var(--cat-noble-gas);
  --cell-glow: rgba(171, 109, 214, 0.35);
}
.category-lanthanide {
  --cell-bg: rgba(224, 112, 176, 0.12);
  --cell-color: var(--cat-lanthanide);
  --cell-glow: rgba(224, 112, 176, 0.35);
}
.category-actinide {
  --cell-bg: rgba(192, 96, 208, 0.12);
  --cell-color: var(--cat-actinide);
  --cell-glow: rgba(192, 96, 208, 0.35);
}

/* Legend */
.legend {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px 20px;
  margin-top: 20px;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.72rem;
  color: var(--text-secondary);
}

.legend-swatch {
  width: 12px;
  height: 12px;
  border-radius: 3px;
}

/* ============================================================
   QUIZ SCREEN
   ============================================================ */
.quiz-content {
  width: 100%;
  max-width: 700px;
  animation: fadeInUp 0.5s ease-out;
}

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

/* Element Badge */
.quiz-element-badge {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 72px;
  height: 72px;
  background: var(--bg-glass);
  border: 1px solid var(--gold-dim);
  border-radius: var(--radius-md);
  box-shadow: 0 0 16px var(--gold-glow);
  flex-shrink: 0;
}

.quiz-element-badge__number {
  font-family: var(--font-body);
  font-size: 0.6rem;
  color: var(--text-dim);
}

.quiz-element-badge__symbol {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--gold);
  line-height: 1.1;
}

.quiz-element-badge__name {
  font-family: var(--font-body);
  font-size: 0.55rem;
  color: var(--text-secondary);
}

/* Meta (progress + score) */
.quiz-meta {
  text-align: right;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.quiz-progress-text {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.03em;
}

.quiz-score {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--gold);
}

/* Quit Button */
.quiz-quit-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-dim);
  cursor: pointer;
  transition: background-color var(--transition-fast), color var(--transition-fast);
  align-self: flex-end;
}

.quiz-quit-btn svg {
  width: 14px;
  height: 14px;
}

.quiz-quit-btn:hover {
  background: rgba(255, 51, 102, 0.15);
  color: var(--wrong);
}

/* Progress Bar */
.quiz-progress-bar-track {
  width: 100%;
  height: 4px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 2px;
  margin-bottom: 32px;
  overflow: hidden;
}

.quiz-progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--gold), var(--cyan));
  border-radius: 2px;
  transition: width 0.6s cubic-bezier(0.22, 1, 0.36, 1);
  box-shadow: 0 0 8px var(--gold-glow);
}

/* Question Card */
.quiz-question-card {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-lg);
  padding: 32px;
  margin-bottom: 28px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.quiz-question-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
}

.quiz-question-category {
  font-family: var(--font-heading);
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--cyan);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.quiz-question-text {
  font-family: var(--font-body);
  font-size: clamp(1.1rem, 3vw, 1.35rem);
  font-weight: 500;
  color: var(--text-primary);
  line-height: 1.5;
}

/* Answers Grid */
.quiz-answers {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.answer-btn {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 20px;
  background: var(--bg-card);
  border: 1.5px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  text-align: left;
  transition:
    transform var(--transition-fast),
    border-color var(--transition-fast),
    box-shadow var(--transition-base),
    background-color var(--transition-fast);
  cursor: pointer;
}

.answer-btn:hover:not(.answered) {
  border-color: var(--cyan-dim);
  box-shadow: 0 0 16px var(--cyan-glow);
  transform: translateY(-2px);
  background: rgba(0, 229, 255, 0.05);
}

.answer-btn:active:not(.answered) {
  transform: scale(0.98);
}

.answer-label {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--cyan);
  flex-shrink: 0;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.answer-text {
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-primary);
  line-height: 1.3;
}

/* Answer States */
.answer-btn.answered {
  cursor: default;
  pointer-events: none;
}

.answer-btn.correct {
  border-color: var(--correct);
  background: rgba(0, 255, 136, 0.08);
  box-shadow: 0 0 20px var(--correct-glow);
  animation: correctPulse 0.6s ease;
}

.answer-btn.correct .answer-label {
  background: var(--correct);
  color: #0a0e27;
}

.answer-btn.wrong {
  border-color: var(--wrong);
  background: rgba(255, 51, 102, 0.08);
  box-shadow: 0 0 20px var(--wrong-glow);
  animation: wrongShake 0.5s ease;
}

.answer-btn.wrong .answer-label {
  background: var(--wrong);
  color: #0a0e27;
}

.answer-btn.dimmed {
  opacity: 0.35;
}

@keyframes correctPulse {
  0% { transform: scale(1); }
  30% { transform: scale(1.03); }
  60% { transform: scale(0.99); }
  100% { transform: scale(1); }
}

@keyframes wrongShake {
  0%, 100% { transform: translateX(0); }
  15% { transform: translateX(-8px); }
  30% { transform: translateX(7px); }
  45% { transform: translateX(-6px); }
  60% { transform: translateX(4px); }
  75% { transform: translateX(-2px); }
}

/* Question transition */
.quiz-question-card.slide-in {
  animation: slideIn 0.45s cubic-bezier(0.22, 1, 0.36, 1);
}

.quiz-answers.slide-in {
  animation: slideIn 0.45s cubic-bezier(0.22, 1, 0.36, 1);
  animation-delay: 0.08s;
  animation-fill-mode: both;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* ============================================================
   RESULTS SCREEN
   ============================================================ */
.results-content {
  width: 100%;
  max-width: 640px;
  animation: fadeInUp 0.6s ease-out;
}

.results-header {
  text-align: center;
  margin-bottom: 40px;
}

.results-title {
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 4vw, 1.8rem);
  color: var(--gold);
  text-shadow: 0 0 20px var(--gold-glow);
  margin-bottom: 28px;
  letter-spacing: 0.06em;
}

/* Score Ring */
.results-score-ring {
  position: relative;
  width: 140px;
  height: 140px;
  margin: 0 auto 24px;
}

.results-ring-svg {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.results-ring-bg {
  fill: none;
  stroke: rgba(255, 255, 255, 0.06);
  stroke-width: 6;
}

.results-ring-fill {
  fill: none;
  stroke: var(--gold);
  stroke-width: 6;
  stroke-linecap: round;
  stroke-dasharray: 339.292;
  stroke-dashoffset: 339.292;
  transition: stroke-dashoffset 1.2s cubic-bezier(0.22, 1, 0.36, 1);
  filter: drop-shadow(0 0 6px var(--gold-glow));
}

.results-score-number {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -60%);
  font-family: var(--font-display);
  font-size: 3rem;
  color: var(--text-primary);
  line-height: 1;
}

.results-score-total {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, 40%);
  font-family: var(--font-heading);
  font-size: 1rem;
  color: var(--text-dim);
}

.results-message {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--cyan);
}

/* Review List */
.results-review {
  margin-bottom: 36px;
}

.results-review-title {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-dim);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 16px;
  text-align: center;
}

.results-review-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: 320px;
  overflow-y: auto;
  padding-right: 4px;
}

.results-review-list::-webkit-scrollbar {
  width: 4px;
}

.results-review-list::-webkit-scrollbar-track {
  background: transparent;
}

.results-review-list::-webkit-scrollbar-thumb {
  background: var(--text-dim);
  border-radius: 2px;
}

.review-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 16px;
  background: var(--bg-glass);
  border-radius: var(--radius-sm);
  border-left: 3px solid;
}

.review-item.review-correct {
  border-left-color: var(--correct);
}

.review-item.review-wrong {
  border-left-color: var(--wrong);
}

.review-number {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-dim);
  min-width: 20px;
}

.review-body {
  flex: 1;
}

.review-question {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

.review-answer {
  font-size: 0.8rem;
  font-weight: 600;
}

.review-answer.review-answer--correct {
  color: var(--correct);
}

.review-answer.review-answer--wrong {
  color: var(--wrong);
}

.review-answer .correct-was {
  color: var(--text-dim);
  font-weight: 400;
}

/* Results Actions */
.results-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ============================================================
   MODE SELECT SCREEN
   ============================================================ */
.mode-select-content {
  width: 100%;
  max-width: 800px;
  animation: fadeInUp 0.6s ease-out;
}

.mode-select-title {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 4vw, 2rem);
  text-align: center;
  color: var(--gold);
  text-shadow: 0 0 20px var(--gold-glow);
  margin-bottom: 36px;
}

.mode-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.mode-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 28px 20px;
  background: var(--bg-card);
  border: 1.5px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition:
    transform var(--transition-fast),
    border-color var(--transition-base),
    box-shadow var(--transition-base),
    background-color var(--transition-fast);
  text-align: center;
}

.mode-card:hover {
  transform: translateY(-4px);
  border-color: var(--cyan-dim);
  box-shadow: 0 0 24px var(--cyan-glow), 0 8px 32px rgba(0, 0, 0, 0.4);
  background: rgba(0, 229, 255, 0.04);
}

.mode-card--speed:hover {
  border-color: var(--wrong);
  box-shadow: 0 0 24px var(--wrong-glow), 0 8px 32px rgba(0, 0, 0, 0.4);
  background: rgba(255, 51, 102, 0.04);
}

.mode-card__icon {
  width: 40px;
  height: 40px;
  margin-bottom: 16px;
  color: var(--cyan);
}

.mode-card--speed .mode-card__icon {
  color: var(--wrong);
}

.mode-card__icon svg {
  width: 100%;
  height: 100%;
}

.mode-card__title {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.06em;
  margin-bottom: 8px;
}

.mode-card__desc {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

/* ============================================================
   COUNT SELECT SCREEN
   ============================================================ */
.count-select-content {
  text-align: center;
  max-width: 500px;
  animation: fadeInUp 0.6s ease-out;
}

.count-select-title {
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 4vw, 1.8rem);
  color: var(--gold);
  text-shadow: 0 0 20px var(--gold-glow);
  margin-bottom: 36px;
}

.count-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
  margin-bottom: 32px;
}

.count-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 90px;
  height: 90px;
  background: var(--bg-card);
  border: 1.5px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--text-primary);
  cursor: pointer;
  transition:
    transform var(--transition-fast),
    border-color var(--transition-base),
    box-shadow var(--transition-base);
}

.count-btn:hover {
  transform: translateY(-3px);
  border-color: var(--cyan-dim);
  box-shadow: 0 0 20px var(--cyan-glow);
}

.count-btn--all {
  width: auto;
  padding: 0 24px;
  background: linear-gradient(135deg, rgba(255, 215, 0, 0.08), rgba(0, 229, 255, 0.08));
  border-color: var(--gold-dim);
}

.count-btn--all:hover {
  border-color: var(--gold);
  box-shadow: 0 0 20px var(--gold-glow);
}

.count-btn__sub {
  display: block;
  font-family: var(--font-body);
  font-size: 0.65rem;
  color: var(--text-dim);
  margin-top: 2px;
}

.count-back-btn,
.category-back-btn {
  margin-top: 8px;
  padding: 10px 28px;
  font-size: 0.85rem;
}

/* ============================================================
   CATEGORY SELECT SCREEN
   ============================================================ */
.category-select-content {
  text-align: center;
  max-width: 700px;
  animation: fadeInUp 0.6s ease-out;
}

.category-select-title {
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 4vw, 1.8rem);
  color: var(--gold);
  text-shadow: 0 0 20px var(--gold-glow);
  margin-bottom: 8px;
}

.category-select-element {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 600;
  color: var(--cyan);
  margin-bottom: 32px;
}

.category-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-bottom: 24px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

.category-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 28px 16px;
  background: var(--bg-card);
  border: 1.5px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-lg);
  cursor: pointer;
  text-align: center;
  transition:
    transform var(--transition-fast),
    border-color var(--transition-base),
    box-shadow var(--transition-base),
    background-color var(--transition-fast);
}

.category-card:hover {
  transform: translateY(-4px);
  border-color: var(--gold-dim);
  box-shadow: 0 0 24px var(--gold-glow), 0 8px 32px rgba(0, 0, 0, 0.4);
  background: rgba(255, 215, 0, 0.04);
}

.category-card__icon {
  width: 36px;
  height: 36px;
  margin-bottom: 14px;
  color: var(--gold);
}

.category-card__icon svg {
  width: 100%;
  height: 100%;
}

.category-card__title {
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.06em;
  margin-bottom: 8px;
}

.category-card__desc {
  font-size: 0.75rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

/* ============================================================
   QUIZ TIMER (Speed Mode)
   ============================================================ */
.quiz-timer {
  display: none;
  width: 100%;
  height: 6px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 3px;
  margin-bottom: 24px;
  overflow: hidden;
}

.quiz-timer.active {
  display: block;
}

.quiz-timer-bar {
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, var(--wrong), var(--gold), var(--correct));
  border-radius: 3px;
  transition: width 0.05s linear;
  box-shadow: 0 0 8px var(--gold-glow);
}

.quiz-timer-bar.urgent {
  background: var(--wrong);
  box-shadow: 0 0 12px var(--wrong-glow);
  animation: timerPulse 0.3s ease-in-out infinite;
}

@keyframes timerPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

/* Badge hiding */
.quiz-element-badge.badge-hidden {
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-fast);
}

/* ============================================================
   CONFETTI
   ============================================================ */
#confetti-container {
  position: fixed;
  inset: 0;
  z-index: 100;
  pointer-events: none;
  overflow: hidden;
}

.confetti-piece {
  position: absolute;
  width: 10px;
  height: 10px;
  top: -20px;
  animation: confettiFall linear forwards;
}

@keyframes confettiFall {
  0% {
    transform: translateY(0) rotate(0deg) scale(1);
    opacity: 1;
  }
  80% {
    opacity: 1;
  }
  100% {
    transform: translateY(100vh) rotate(720deg) scale(0.5);
    opacity: 0;
  }
}

/* ============================================================
   UTILITY ANIMATIONS
   ============================================================ */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* ============================================================
   RESPONSIVE
   ============================================================ */

/* Tablet */
@media (max-width: 1024px) {
  .periodic-table {
    grid-template-columns: repeat(18, minmax(42px, 1fr));
    grid-template-rows: repeat(7, 44px) 16px repeat(2, 44px);
    gap: 2px;
    min-width: 780px;
  }

  .element-cell .el-name {
    display: none;
  }

  .element-cell .symbol {
    font-size: 0.95rem;
  }
}

/* Mobile */
@media (max-width: 768px) {
  .mode-cards {
    grid-template-columns: 1fr;
    max-width: 360px;
    margin: 0 auto;
  }

  .category-cards {
    grid-template-columns: 1fr;
    max-width: 360px;
    margin: 0 auto 24px;
  }

  .count-buttons {
    gap: 10px;
  }

  .count-btn {
    width: 75px;
    height: 75px;
    font-size: 1.2rem;
  }
  .screen {
    padding: 16px;
    align-items: flex-start;
    padding-top: 40px;
  }

  .quiz-answers {
    grid-template-columns: 1fr;
  }

  .quiz-header {
    flex-wrap: wrap;
  }

  .quiz-element-badge {
    width: 60px;
    height: 60px;
  }

  .quiz-element-badge__symbol {
    font-size: 1.2rem;
  }

  .quiz-question-card {
    padding: 24px 20px;
  }

  .results-actions {
    flex-direction: column;
  }

  .results-actions .btn {
    width: 100%;
  }

  .periodic-table {
    grid-template-columns: repeat(18, 38px);
    grid-template-rows: repeat(7, 38px) 12px repeat(2, 38px);
    min-width: 700px;
  }

  .element-cell .el-name {
    display: none;
  }

  .element-cell .atomic-number {
    font-size: 0.45rem;
  }

  .element-cell .symbol {
    font-size: 0.8rem;
  }

  .legend {
    gap: 8px 14px;
  }

  .legend-item {
    font-size: 0.65rem;
  }
}

@media (max-width: 480px) {
  .title-logo {
    font-size: 2.6rem;
  }

  .title-atom {
    width: 80px;
    height: 80px;
    margin-bottom: 24px;
  }

  .atom-ring--1,
  .atom-ring--2,
  .atom-ring--3 {
    width: 70px;
    height: 28px;
  }

  .btn {
    padding: 14px 32px;
    font-size: 0.95rem;
  }

  .periodic-table {
    grid-template-columns: repeat(18, 32px);
    grid-template-rows: repeat(7, 32px) 10px repeat(2, 32px);
  }
}