/* ===== CSS Custom Properties ===== */
:root {
  --bg-dark: #1a1a2e;
  --bg-darker: #16213e;
  --card-bg: #f5f5f5;
  --card-hover: #ffffff;
  --correct: #4caf50;
  --correct-bg: #e8f5e9;
  --wrong: #f44336;
  --wrong-bg: #ffebee;
  --accent: #ffd700;
  --accent-dim: #b8960f;
  --text-light: #ffffff;
  --text-dark: #1a1a2e;
  --text-muted: #c8c8e0;
  --text-card: #2c2c2c;
  --shadow: rgba(0, 0, 0, 0.3);
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, sans-serif;
  --font-serif: Georgia, 'Times New Roman', serif;
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-dark);
  color: var(--text-light);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ===== Screens ===== */
.screen {
  display: none;
  min-height: 100vh;
  padding: 20px;
}

.screen.active {
  display: flex;
  align-items: center;
  justify-content: center;
}

.container {
  width: 100%;
  max-width: 700px;
  margin: 0 auto;
}

/* ===== Start Screen ===== */
.title {
  font-size: 2.2rem;
  font-weight: 900;
  line-height: 1.1;
  text-align: center;
  letter-spacing: -1px;
  background: linear-gradient(135deg, var(--accent), #ff6b35);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 16px;
}

.subtitle {
  text-align: center;
  font-size: 1.3rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.description {
  text-align: center;
  font-size: 0.95rem;
  color: var(--text-muted);
  opacity: 0.7;
  margin-bottom: 40px;
  line-height: 1.5;
}

.stats {
  text-align: center;
  margin-top: 20px;
  font-size: 0.85rem;
  color: var(--text-muted);
  opacity: 0.6;
}

/* ===== Buttons ===== */
.btn {
  display: block;
  width: 100%;
  max-width: 300px;
  margin: 0 auto;
  padding: 16px 32px;
  border: none;
  border-radius: 12px;
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 2px;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  -webkit-tap-highlight-color: transparent;
}

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

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #ff6b35);
  color: var(--text-dark);
  box-shadow: 0 4px 20px rgba(255, 215, 0, 0.3);
}

.btn-primary:hover {
  box-shadow: 0 6px 30px rgba(255, 215, 0, 0.5);
  transform: translateY(-2px);
}

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

.btn-secondary:hover {
  background: rgba(255, 215, 0, 0.1);
}

.btn-next {
  display: none;
  background: var(--accent);
  color: var(--text-dark);
  margin-top: 20px;
}

/* ===== Game Screen ===== */
.game-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  padding: 12px 16px;
  background: var(--bg-darker);
  border-radius: 12px;
}

.round-info {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-muted);
}

.correct-info {
  font-size: 1rem;
  font-weight: 600;
  color: var(--accent);
}

.game-prompt {
  text-align: center;
  font-size: 1.1rem;
  font-weight: 400;
  color: var(--text-muted);
  margin-bottom: 20px;
}

/* ===== Quote Cards ===== */
.cards-container {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.card {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 20px 24px;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.2s ease, background 0.3s ease;
  border: 3px solid transparent;
  position: relative;
  -webkit-tap-highlight-color: transparent;
}

.card:hover:not(.card--disabled) {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--shadow);
  background: var(--card-hover);
}

.card:active:not(.card--disabled) {
  transform: scale(0.98);
}

.card-text {
  font-family: var(--font-serif);
  font-size: 1rem;
  line-height: 1.5;
  color: var(--text-card);
  font-style: italic;
}

.card-text::before {
  content: '\201C';
  font-size: 1.3em;
  opacity: 0.4;
}

.card-text::after {
  content: '\201D';
  font-size: 1.3em;
  opacity: 0.4;
}

.card-icon {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: none;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 700;
}

.card--correct {
  border-color: var(--correct);
  background: var(--correct-bg);
  cursor: default;
}

.card--correct .card-icon {
  display: flex;
  background: var(--correct);
  color: white;
}

.card--wrong {
  border-color: var(--wrong);
  background: var(--wrong-bg);
  cursor: default;
}

.card--wrong .card-icon {
  display: flex;
  background: var(--wrong);
  color: white;
}

.card--disabled {
  opacity: 0.4;
  cursor: default;
}

.card--disabled.card--correct,
.card--disabled.card--wrong {
  opacity: 1;
}

.card--disabled:hover {
  transform: none;
  box-shadow: none;
}

/* ===== Source Reveal ===== */
.source-reveal {
  display: none;
  text-align: center;
  margin-top: 16px;
  padding: 12px 16px;
  background: rgba(76, 175, 80, 0.15);
  border-radius: 8px;
  animation: fadeIn 0.3s ease;
}

.source-reveal.visible {
  display: block;
}

.source-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 4px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.source-reveal a {
  color: var(--correct);
  font-size: 0.9rem;
  text-decoration: underline;
  word-break: break-all;
}

/* ===== Results Screen ===== */
#screen-results .container {
  text-align: center;
}

.results-title {
  font-size: 2rem;
  font-weight: 900;
  margin-bottom: 12px;
  color: var(--accent);
}

.results-score {
  font-size: 4rem;
  font-weight: 900;
  margin-bottom: 8px;
}

.results-correct {
  color: var(--accent);
}

.results-total {
  color: var(--text-muted);
  font-size: 2rem;
}

.results-message {
  font-size: 1.1rem;
  color: var(--text-muted);
  font-style: italic;
  margin-bottom: 12px;
}

.results-recap {
  margin-bottom: 30px;
  text-align: left;
}

.recap-item {
  padding: 12px 16px;
  margin-bottom: 8px;
  border-radius: 8px;
  background: var(--bg-darker);
  border-left: 4px solid;
}

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

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

.recap-round {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 4px;
}

.recap-quote {
  font-family: var(--font-serif);
  font-size: 0.9rem;
  font-style: italic;
  color: var(--text-light);
  opacity: 0.9;
  line-height: 1.4;
}

.results-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
}

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

.high-score {
  margin-top: 20px;
  font-size: 0.85rem;
  color: var(--text-muted);
  opacity: 0.6;
  text-align: center;
}

/* ===== Animations ===== */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  15% { transform: translateX(-6px); }
  30% { transform: translateX(6px); }
  45% { transform: translateX(-4px); }
  60% { transform: translateX(4px); }
  75% { transform: translateX(-2px); }
  90% { transform: translateX(2px); }
}

@keyframes pulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.02); }
  100% { transform: scale(1); }
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

.card-enter {
  animation: fadeInUp 0.4s ease forwards;
  opacity: 0;
}

.card-enter:nth-child(1) { animation-delay: 0ms; }
.card-enter:nth-child(2) { animation-delay: 80ms; }
.card-enter:nth-child(3) { animation-delay: 160ms; }
.card-enter:nth-child(4) { animation-delay: 240ms; }

.card--correct {
  opacity: 1;
  animation: pulse 0.5s ease;
}

.card--wrong.card--selected {
  opacity: 1;
  animation: shake 0.5s ease;
}

.screen.active {
  animation: fadeIn 0.3s ease;
}

/* ===== Toast Notification ===== */
.toast {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-darker);
  color: var(--text-light);
  padding: 12px 24px;
  border-radius: 8px;
  font-size: 0.9rem;
  box-shadow: 0 4px 20px var(--shadow);
  animation: slideDown 0.3s ease, fadeIn 0.3s ease;
  z-index: 100;
}

/* ===== Persistent Share Button ===== */
.share-persistent {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 50;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: none;
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s ease, color 0.2s ease;
  -webkit-tap-highlight-color: transparent;
}

.share-persistent:hover {
  background: rgba(255, 215, 0, 0.2);
  color: var(--accent);
}

/* ===== CritMass Inline Promo (Mobile) ===== */
.critmass-inline {
  display: none;
  margin-top: 16px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  overflow: hidden;
  animation: fadeIn 0.3s ease;
}

.critmass-inline.visible {
  display: block;
}

.critmass-inline--results {
  display: block;
  margin-top: 24px;
}

.critmass-inline-link {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 16px;
  text-decoration: none;
  color: var(--text-light);
  text-align: center;
}

.critmass-inline-text {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.85);
  line-height: 1.4;
}

.critmass-inline-cta {
  display: inline-block;
  padding: 8px 20px;
  border-radius: 6px;
  background: var(--accent);
  color: var(--text-dark);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  white-space: nowrap;
  margin-top: 4px;
}

/* ===== CritMass Desktop Sidebar ===== */
.critmass-sidebar {
  display: none;
}

/* ===== Desktop Layout ===== */
@media (min-width: 768px) {
  .title {
    font-size: 3.2rem;
  }

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

  .card {
    padding: 24px 28px;
  }

  .card-text {
    font-size: 1.05rem;
  }

  .results-actions {
    flex-direction: row;
    justify-content: center;
  }

  .results-actions .btn {
    width: auto;
    min-width: 200px;
  }

  /* CritMass sidebar visible on desktop */
  .critmass-sidebar {
    display: flex;
    position: fixed;
    right: 0;
    top: 0;
    bottom: 0;
    width: 200px;
    align-items: center;
    justify-content: center;
    z-index: 40;
    pointer-events: none;
  }

  .critmass-sidebar-inner {
    pointer-events: auto;
    text-align: center;
    padding: 24px 16px;
    background: rgba(255, 255, 255, 0.04);
    border-left: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 8px 0 0 8px;
  }

  .critmass-desc {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.85);
    line-height: 1.5;
    margin-bottom: 16px;
  }

  .critmass-cta {
    display: inline-block;
    padding: 8px 16px;
    border-radius: 6px;
    background: var(--accent);
    color: var(--text-dark);
    font-size: 0.8rem;
    font-weight: 700;
    text-decoration: none;
    letter-spacing: 1px;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
  }

  .critmass-cta:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(255, 215, 0, 0.3);
  }

  /* Hide inline CritMass promos on desktop (sidebar is shown instead) */
  .critmass-inline,
  .critmass-inline--results {
    display: none !important;
  }

  /* Move share button to not overlap sidebar */
  .share-persistent {
    right: 210px;
  }
}

@media (min-width: 1024px) {
  .container {
    max-width: 800px;
  }

  .title {
    font-size: 3.8rem;
  }

  .card:hover:not(.card--disabled) {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px var(--shadow);
  }
}