:root {
  --bg-1: #fff7ec;
  --bg-2: #ffd6a0;
  --bg-3: #f7a072;
  --bg-4: #e76f51;
  --gold: #d4a73e;
  --coral: #e76f51;
  --navy: #1d2b4b;
  --ink: #2b2a33;
  --paper: #fffdf6;
  --shadow: 0 18px 50px -18px rgba(20, 20, 40, 0.35);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  height: 100%;
  font-family: "Inter", system-ui, sans-serif;
  color: var(--ink);
  background:
    radial-gradient(ellipse at 20% 10%, var(--bg-2) 0%, transparent 55%),
    radial-gradient(ellipse at 80% 80%, var(--bg-3) 0%, transparent 50%),
    linear-gradient(135deg, var(--bg-1) 0%, var(--bg-2) 60%, var(--bg-4) 130%);
  overflow: hidden;
}

body {
  display: flex;
  flex-direction: column;
}

/* Confetti — pure CSS, drifts in the background */
.confetti {
  position: fixed;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  z-index: 0;
}

.confetti span {
  position: absolute;
  top: -10vh;
  width: 10px;
  height: 14px;
  border-radius: 2px;
  opacity: 0.75;
  animation: drift 14s linear infinite;
}

.confetti span:nth-child(5n + 1) { background: var(--gold); }
.confetti span:nth-child(5n + 2) { background: var(--coral); }
.confetti span:nth-child(5n + 3) { background: var(--navy); }
.confetti span:nth-child(5n + 4) { background: #f4d35e; }
.confetti span:nth-child(5n + 5) { background: #ee964b; }

.confetti span:nth-child(1)  { left:  4%; animation-delay:  0s;  animation-duration: 13s; }
.confetti span:nth-child(2)  { left: 11%; animation-delay:  2s;  animation-duration: 16s; }
.confetti span:nth-child(3)  { left: 18%; animation-delay:  4s;  animation-duration: 11s; }
.confetti span:nth-child(4)  { left: 25%; animation-delay:  1s;  animation-duration: 18s; }
.confetti span:nth-child(5)  { left: 32%; animation-delay:  6s;  animation-duration: 12s; }
.confetti span:nth-child(6)  { left: 39%; animation-delay:  3s;  animation-duration: 15s; }
.confetti span:nth-child(7)  { left: 46%; animation-delay:  7s;  animation-duration: 14s; }
.confetti span:nth-child(8)  { left: 53%; animation-delay:  5s;  animation-duration: 17s; }
.confetti span:nth-child(9)  { left: 60%; animation-delay:  9s;  animation-duration: 11s; }
.confetti span:nth-child(10) { left: 67%; animation-delay:  2s;  animation-duration: 13s; }
.confetti span:nth-child(11) { left: 74%; animation-delay:  8s;  animation-duration: 19s; }
.confetti span:nth-child(12) { left: 81%; animation-delay:  4s;  animation-duration: 12s; }
.confetti span:nth-child(13) { left: 88%; animation-delay:  6s;  animation-duration: 16s; }
.confetti span:nth-child(14) { left: 95%; animation-delay:  1s;  animation-duration: 14s; }
.confetti span:nth-child(15) { left:  8%; animation-delay: 10s;  animation-duration: 18s; }
.confetti span:nth-child(16) { left: 22%; animation-delay:  3s;  animation-duration: 15s; }
.confetti span:nth-child(17) { left: 44%; animation-delay: 11s;  animation-duration: 13s; }
.confetti span:nth-child(18) { left: 66%; animation-delay:  0s;  animation-duration: 17s; }
.confetti span:nth-child(19) { left: 78%; animation-delay:  5s;  animation-duration: 11s; }
.confetti span:nth-child(20) { left: 92%; animation-delay:  7s;  animation-duration: 16s; }

@keyframes drift {
  0%   { transform: translateY(-10vh) rotate(0deg); }
  100% { transform: translateY(115vh) rotate(720deg); }
}

@media (prefers-reduced-motion: reduce) {
  .confetti { display: none; }
}

/* Stage = the slide */
.stage {
  position: relative;
  z-index: 1;
  flex: 1 1 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(1.5rem, 4vw, 4rem);
  outline: none;
}

.slide {
  background: var(--paper);
  border-radius: 24px;
  box-shadow: var(--shadow);
  padding: clamp(1.75rem, 4vw, 3.5rem) clamp(1.75rem, 5vw, 4rem);
  max-width: min(960px, 92vw);
  width: 100%;
  text-align: center;
  position: relative;
}

.slide-kicker {
  display: inline-block;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.78rem;
  color: var(--coral);
  font-weight: 700;
  margin-bottom: 1.25rem;
}

.slide-q {
  font-family: "Playfair Display", Georgia, serif;
  font-weight: 700;
  font-size: clamp(1.6rem, 3.5vw, 2.6rem);
  line-height: 1.2;
  color: var(--navy);
  margin: 0 0 1.5rem;
}

/* MCQ choices */
.choices {
  list-style: none;
  padding: 0;
  margin: 0 auto 1.5rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 0.75rem;
  max-width: 760px;
  text-align: left;
}

.choices li {
  background: rgba(212, 167, 62, 0.08);
  border: 2px solid rgba(212, 167, 62, 0.35);
  border-radius: 12px;
  padding: 0.85rem 1.1rem;
  font-size: 1.05rem;
  font-weight: 500;
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  transition: background 0.25s, border-color 0.25s, transform 0.25s;
}

.choices li .letter {
  font-family: "Playfair Display", serif;
  font-weight: 700;
  color: var(--coral);
  font-size: 1.2rem;
}

.slide.revealed .choices li.correct {
  background: rgba(76, 175, 80, 0.18);
  border-color: #4caf50;
  transform: scale(1.02);
}

.slide.revealed .choices li.correct .letter { color: #2e7d32; }

/* True/False */
.tf-options {
  display: flex;
  justify-content: center;
  gap: 1.25rem;
  margin: 0 auto 1.5rem;
  flex-wrap: wrap;
}

.tf-options .tf-btn {
  font-family: "Playfair Display", serif;
  font-weight: 700;
  font-size: 2rem;
  border: 2px solid var(--navy);
  border-radius: 16px;
  padding: 1rem 2.5rem;
  background: transparent;
  color: var(--navy);
  min-width: 180px;
}

.slide.revealed .tf-btn.correct {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--navy);
  transform: scale(1.05);
}

/* Reveal box */
.reveal {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height 0.4s ease, opacity 0.4s ease, margin 0.4s ease;
  margin-top: 0;
}

.slide.revealed .reveal {
  max-height: 600px;
  opacity: 1;
  margin-top: 1.25rem;
}

.reveal-inner {
  background: linear-gradient(135deg, var(--gold), #f4d35e);
  color: var(--navy);
  border-radius: 14px;
  padding: 1.25rem 1.5rem;
  font-size: 1.1rem;
  font-weight: 500;
}

.reveal-answer {
  font-family: "Playfair Display", serif;
  font-weight: 700;
  font-size: 1.4rem;
  display: block;
  margin-bottom: 0.4rem;
}

.reveal-btn {
  display: inline-block;
  margin: 0.5rem auto 0;
  background: var(--navy);
  color: var(--paper);
  border: none;
  font-family: "Inter", sans-serif;
  font-weight: 700;
  letter-spacing: 0.04em;
  padding: 0.85rem 2rem;
  border-radius: 999px;
  cursor: pointer;
  font-size: 1rem;
  box-shadow: 0 6px 18px -6px rgba(29, 43, 75, 0.6);
}

.reveal-btn:hover { background: var(--coral); }
.slide.revealed .reveal-btn { display: none; }

/* Divider slide */
.slide.divider {
  background: linear-gradient(135deg, var(--navy), #34406b);
  color: var(--paper);
}

.slide.divider .slide-kicker { color: var(--gold); }
.slide.divider .slide-q { color: var(--paper); }
.slide.divider .slide-sub {
  font-family: "Playfair Display", serif;
  font-style: italic;
  font-size: 1.3rem;
  opacity: 0.85;
  margin: 0;
}

/* Title / gag / finale */
.slide.title .slide-q,
.slide.finale .slide-q {
  font-size: clamp(2rem, 5vw, 3.6rem);
}

.slide.gag {
  background: linear-gradient(135deg, var(--gold), var(--coral));
  color: var(--paper);
}

.slide.gag .slide-q,
.slide.gag .slide-kicker { color: var(--paper); }

.gag-numbers {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin: 1.5rem auto;
  font-family: "Playfair Display", serif;
  font-size: clamp(1.3rem, 3vw, 2rem);
  line-height: 1.4;
  font-weight: 700;
}

.gag-numbers span { display: block; }
.gag-numbers .arrow { font-size: 1.5rem; opacity: 0.8; }
.gag-punch {
  font-style: italic;
  font-family: "Playfair Display", serif;
  font-size: 1.2rem;
  margin-top: 1rem;
}

/* Rapid-fire slide */
.slide.rapid {
  background: var(--navy);
  color: var(--paper);
}

.slide.rapid .slide-kicker { color: var(--gold); }
.slide.rapid .slide-q {
  color: var(--paper);
  font-size: clamp(1.8rem, 4vw, 3rem);
}

.rapid-vs {
  font-family: "Playfair Display", serif;
  font-style: italic;
  font-size: 1.5rem;
  color: var(--gold);
  margin: 0.5rem 0;
}

.rapid-timer {
  display: inline-block;
  margin-top: 1rem;
  font-family: "Playfair Display", serif;
  font-size: 3rem;
  font-weight: 900;
  color: var(--gold);
  min-width: 4rem;
}

.rapid-timer.expired { color: var(--coral); }

/* Savage slide */
.slide.savage {
  background: linear-gradient(135deg, #2b2a33, #4a2c3f);
  color: var(--paper);
}

.slide.savage .slide-kicker { color: var(--coral); }
.slide.savage .slide-q { color: var(--paper); }

/* Finale */
.slide.finale {
  background: linear-gradient(135deg, var(--gold), var(--coral));
  color: var(--paper);
  text-align: center;
}

.slide.finale .slide-q,
.slide.finale .slide-kicker { color: var(--paper); }

.finale-cake {
  font-size: 5rem;
  margin: 1rem 0;
}

/* Tap zones (touch-friendly nav) */
.tap-zone {
  position: fixed;
  top: 0;
  bottom: 0;
  width: 18vw;
  background: transparent;
  border: none;
  cursor: pointer;
  z-index: 2;
}

.tap-zone.tap-back { left: 0; }
.tap-zone.tap-next { right: 0; }
.tap-zone:focus { outline: none; }

/* HUD footer */
.hud {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.6rem 1.25rem;
  font-size: 0.78rem;
  color: var(--navy);
  background: rgba(255, 253, 246, 0.55);
  backdrop-filter: blur(6px);
}

.hud kbd {
  background: var(--paper);
  border: 1px solid rgba(29, 43, 75, 0.2);
  border-radius: 4px;
  padding: 1px 6px;
  font-family: "Inter", sans-serif;
  font-size: 0.75rem;
}

.hud-hint { opacity: 0.85; }

/* Source link in reveal */
.reveal-source {
  display: block;
  margin-top: 0.5rem;
  font-size: 0.78rem;
  opacity: 0.75;
}

.reveal-source a {
  color: inherit;
  text-decoration: underline;
}

/* Help button in HUD */
.hud-help-btn {
  border: none;
  background: transparent;
  padding: 0;
  margin: 0;
  font: inherit;
  color: inherit;
  cursor: pointer;
}
.hud-help-btn:hover kbd { background: var(--gold); }

/* Help overlay (section jump + keyboard reference) */
.help-overlay {
  position: fixed;
  inset: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  background: rgba(20, 20, 40, 0.6);
  backdrop-filter: blur(4px);
}

.help-overlay[hidden] { display: none; }

.help-card {
  background: var(--paper);
  color: var(--ink);
  border-radius: 18px;
  box-shadow: var(--shadow);
  padding: 1.75rem 2rem;
  max-width: min(560px, 92vw);
  max-height: 88vh;
  overflow-y: auto;
  text-align: left;
}

.help-card h2 {
  font-family: "Playfair Display", serif;
  font-size: 1.7rem;
  color: var(--navy);
  margin: 0 0 0.5rem;
}

.help-card h3 {
  font-family: "Playfair Display", serif;
  font-size: 1.1rem;
  color: var(--coral);
  margin: 1.25rem 0 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.help-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

.help-table td {
  padding: 0.35rem 0.5rem;
  vertical-align: top;
}

.help-table td:first-child {
  width: 6.5rem;
  white-space: nowrap;
}

.help-table kbd {
  background: var(--paper);
  border: 1px solid rgba(29, 43, 75, 0.3);
  border-radius: 4px;
  padding: 1px 8px;
  font-family: "Inter", sans-serif;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--navy);
  box-shadow: 0 1px 0 rgba(29, 43, 75, 0.2);
}

.help-close {
  display: block;
  margin: 1.25rem auto 0;
  background: var(--navy);
  color: var(--paper);
  border: none;
  font-family: "Inter", sans-serif;
  font-weight: 700;
  letter-spacing: 0.04em;
  padding: 0.7rem 1.75rem;
  border-radius: 999px;
  cursor: pointer;
  font-size: 0.95rem;
}

.help-close:hover { background: var(--coral); }

/* Small screens */
@media (max-width: 640px) {
  .tap-zone { width: 25vw; }
  .hud-hint { display: none; }
  .choices { grid-template-columns: 1fr; }
  .help-card { padding: 1.25rem; }
}