:root {
  --bg: #070a22;
  --bg-2: #121a4d;
  --panel: rgba(16, 24, 72, 0.85);
  --panel-border: #3b4fb8;
  --text: #f2f4ff;
  --muted: #9aa6dd;
  --gold: #f6c445;
  --gold-2: #ffdf7e;
  --select: #ff9b1f;
  --correct: #22c55e;
  --wrong: #ef4444;
  --answer-bg: linear-gradient(180deg, #1b2668 0%, #0e1546 100%);
  --radius: 14px;
  color-scheme: dark;
  font-family: "Be Vietnam Pro", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
}

body { min-height: 100vh; overflow-x: hidden; }

button { font: inherit; color: inherit; cursor: pointer; }
button:disabled { cursor: not-allowed; }

.stage-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse 60% 45% at 50% 0%, rgba(110, 130, 255, 0.35), transparent 70%),
    radial-gradient(ellipse 40% 60% at 0% 100%, rgba(170, 60, 255, 0.18), transparent 70%),
    radial-gradient(ellipse 40% 60% at 100% 100%, rgba(40, 140, 255, 0.18), transparent 70%),
    linear-gradient(180deg, var(--bg-2) 0%, var(--bg) 70%);
}

.stage-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255, 255, 255, 0.08) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: linear-gradient(180deg, black, transparent 80%);
}

/* ---------- Screens ---------- */
.screen { display: none; min-height: 100vh; }
.screen.active { display: flex; }

#screen-start, #screen-end {
  align-items: center;
  justify-content: center;
  padding: 32px 16px;
}

.start-card {
  width: 100%;
  max-width: 640px;
  text-align: center;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 24px;
  padding: 36px 28px;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(8px);
}

.logo {
  position: relative;
  width: 96px;
  height: 96px;
  margin: 0 auto 16px;
  display: grid;
  place-items: center;
}

.logo-ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: conic-gradient(from 0deg, var(--gold), #8a5cff, #3fa9ff, var(--gold));
  animation: spin 8s linear infinite;
  mask: radial-gradient(circle, transparent 58%, black 60%);
}

.logo-text {
  font-size: 44px;
  font-weight: 800;
  color: var(--gold);
  text-shadow: 0 0 24px rgba(246, 196, 69, 0.6);
}

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

h1 {
  margin: 0;
  font-size: clamp(30px, 6vw, 46px);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

h1 span {
  background: linear-gradient(180deg, var(--gold-2), var(--gold) 60%, #c98a14);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.tagline { color: var(--muted); margin: 10px 0 28px; }

.rules {
  margin-top: 20px;
  text-align: left;
  color: var(--muted);
  font-size: 14px;
}

.rules summary { cursor: pointer; text-align: center; color: var(--text); }
.rules ul { padding-left: 20px; line-height: 1.6; }
.rules b { color: var(--gold-2); }

/* ---------- Buttons ---------- */
.btn {
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 10px 22px;
  font-weight: 600;
  transition: transform 0.1s, filter 0.15s, background 0.15s;
}

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

.btn-primary {
  background: linear-gradient(180deg, var(--gold-2), var(--gold) 55%, #d89a1c);
  color: #2a1a00;
  box-shadow: 0 6px 20px rgba(246, 196, 69, 0.3);
}

.btn-primary:hover { filter: brightness(1.08); }
.btn-primary:disabled { filter: grayscale(1) brightness(0.6); }

.btn-ghost {
  background: transparent;
  border-color: #3b4fb8;
  color: var(--text);
}

.btn-ghost:hover { background: rgba(255, 255, 255, 0.06); }

.btn-big { font-size: 18px; padding: 14px 40px; }

.end-card .btn { display: block; margin: 12px auto 0; }

/* ---------- Top bar ---------- */
#screen-game { flex-direction: column; }

.topbar {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 12px;
  padding: 14px 20px;
}

.lifelines { display: flex; gap: 10px; }

.lifeline {
  position: relative;
  width: 64px;
  height: 42px;
  border-radius: 50%;
  border: 2px solid var(--panel-border);
  background: radial-gradient(ellipse at 50% 30%, #2a3a9a, #0d1446);
  font-weight: 800;
  font-size: 14px;
  display: grid;
  place-items: center;
  transition: transform 0.15s, border-color 0.15s, box-shadow 0.15s;
}

.lifeline svg {
  width: 22px;
  height: 22px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.lifeline:not(:disabled):hover {
  border-color: var(--gold);
  box-shadow: 0 0 16px rgba(246, 196, 69, 0.4);
  transform: translateY(-2px);
}

.lifeline.used { opacity: 0.35; }

.lifeline.used::after {
  content: "";
  position: absolute;
  left: 8px;
  right: 8px;
  top: 50%;
  height: 3px;
  background: var(--wrong);
  transform: rotate(-20deg);
  border-radius: 2px;
}

.timer {
  position: relative;
  width: 64px;
  height: 64px;
  display: grid;
  place-items: center;
}

.timer svg { position: absolute; inset: 0; transform: rotate(-90deg); }
.timer circle { fill: none; stroke-width: 4; }
.timer-track { stroke: rgba(255, 255, 255, 0.1); }

.timer-fill {
  stroke: var(--gold);
  stroke-linecap: round;
  stroke-dasharray: 119.38;
  stroke-dashoffset: 0;
  transition: stroke-dashoffset 1s linear, stroke 0.3s;
}

.timer span { font-size: 22px; font-weight: 800; font-variant-numeric: tabular-nums; }
.timer.warn .timer-fill { stroke: var(--wrong); }
.timer.warn span { color: #ff8a8a; animation: pulse 1s infinite; }
.timer.paused { opacity: 0.5; }

@keyframes pulse { 50% { transform: scale(1.15); } }

.topbar-right { display: flex; justify-content: flex-end; gap: 8px; }

.icon-btn {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  border: 1px solid var(--panel-border);
  background: rgba(10, 16, 56, 0.7);
  display: grid;
  place-items: center;
}

.icon-btn svg {
  width: 22px;
  height: 22px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.ladder-toggle { display: none; }

/* ---------- Game layout ---------- */
.game-layout {
  flex: 1;
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 24px;
  padding: 8px 20px 24px;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
}

.play-area {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 18px;
  min-width: 0;
}

.question-meta {
  text-align: center;
  color: var(--muted);
  font-size: 14px;
}

.question-meta #q-prize { color: var(--gold); font-weight: 700; }
.question-meta .dot { margin: 0 6px; opacity: 0.5; }

.question-box {
  position: relative;
  padding: 26px 40px;
  min-height: 120px;
  display: grid;
  place-items: center;
  text-align: center;
  background: var(--answer-bg);
  border: 2px solid var(--panel-border);
  clip-path: polygon(28px 0, calc(100% - 28px) 0, 100% 50%, calc(100% - 28px) 100%, 28px 100%, 0 50%);
}

.question-box::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.05), transparent);
}

.question-box p {
  margin: 0;
  font-size: clamp(17px, 2.4vw, 23px);
  font-weight: 600;
  line-height: 1.45;
}

.question-box.enter { animation: fadeUp 0.45s ease both; }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: none; }
}

.answers {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px 20px;
}

.answer {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 60px;
  padding: 10px 34px;
  text-align: left;
  font-size: clamp(15px, 1.8vw, 18px);
  border: none;
  background: var(--panel-border);
  clip-path: polygon(20px 0, calc(100% - 20px) 0, 100% 50%, calc(100% - 20px) 100%, 20px 100%, 0 50%);
  transition: filter 0.15s, transform 0.1s;
}

.answer::before {
  content: "";
  position: absolute;
  inset: 2px;
  z-index: 0;
  background: var(--answer-bg);
  clip-path: polygon(19px 0, calc(100% - 19px) 0, 100% 50%, calc(100% - 19px) 100%, 19px 100%, 0 50%);
  transition: background 0.2s;
}

.answer > * { position: relative; z-index: 1; }
.answer .letter { color: var(--gold); font-weight: 800; }
.answer.enter { animation: fadeUp 0.4s ease both; }

.answer:not(:disabled):hover::before { background: linear-gradient(180deg, #2b3a92, #17206a); }
.answer:disabled { cursor: default; }

.answer.hidden-opt { visibility: hidden; }

.answer.selected { background: var(--select); }
.answer.selected::before { background: linear-gradient(180deg, #ffb347, #e07b00); }
.answer.selected .letter { color: #fff; }

.answer.correct { background: #bff5d2; }
.answer.correct::before { background: linear-gradient(180deg, #34d36f, #15803d); }
.answer.correct .letter { color: #fff; }
.answer.correct.flash { animation: flash 0.35s 4; }

.answer.wrong { background: #ffb3b3; }
.answer.wrong::before { background: linear-gradient(180deg, #f05a5a, #b91c1c); }
.answer.wrong .letter { color: #fff; }

@keyframes flash { 50% { filter: brightness(1.6); } }

.bottom-actions { display: flex; justify-content: center; }

/* ---------- Ladder ---------- */
.ladder {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 18px;
  padding: 12px;
  align-self: start;
}

.ladder ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column-reverse;
  gap: 2px;
}

.ladder li {
  display: flex;
  justify-content: space-between;
  padding: 6px 12px;
  border-radius: 8px;
  font-size: 14px;
  font-variant-numeric: tabular-nums;
  color: var(--muted);
  transition: background 0.2s, color 0.2s;
}

.ladder li .lv { width: 28px; color: var(--muted); }
.ladder li .amt { font-weight: 600; }
.ladder li.milestone { color: #fff; }
.ladder li.milestone .amt { color: var(--gold-2); }
.ladder li.passed { color: #6c78b8; }
.ladder li.passed .amt { color: #8f9ad0; }

.ladder li.current {
  background: linear-gradient(90deg, var(--select), #e07b00);
  color: #fff;
}

.ladder li.current .lv, .ladder li.current .amt { color: #fff; }

/* ---------- Modal ---------- */
.modal {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
  place-items: center;
  padding: 16px;
  background: rgba(3, 5, 20, 0.7);
  backdrop-filter: blur(4px);
}

.modal[hidden] { display: none; }

.modal-card {
  width: 100%;
  max-width: 440px;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 20px;
  padding: 24px;
  animation: fadeUp 0.25s ease both;
}

.modal-card h3 { margin: 0 0 14px; font-size: 20px; }
.modal-card p { line-height: 1.6; color: #d5dbff; }
.modal-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 18px; }

.poll {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  height: 200px;
  align-items: end;
  padding-top: 20px;
}

.poll-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  height: 100%;
  gap: 6px;
}

.poll-bar {
  width: 100%;
  height: 0;
  border-radius: 6px 6px 0 0;
  background: linear-gradient(180deg, var(--gold-2), #d89a1c);
  transition: height 1.2s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.poll-pct { font-weight: 700; font-variant-numeric: tabular-nums; }
.poll-letter { color: var(--muted); font-weight: 700; }

.phone-bubble {
  background: rgba(255, 255, 255, 0.06);
  border-left: 3px solid var(--gold);
  padding: 12px 16px;
  border-radius: 10px;
  font-style: italic;
}

/* ---------- End screen ---------- */
.kicker {
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--muted);
  font-size: 13px;
  margin: 0 0 8px;
}

.prize-won {
  font-size: clamp(36px, 8vw, 60px);
  font-weight: 800;
  margin: 18px 0 8px;
  background: linear-gradient(180deg, var(--gold-2), var(--gold) 60%, #c98a14);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.end-detail { color: var(--muted); line-height: 1.6; margin-bottom: 24px; }
.end-detail b { color: var(--text); }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .game-layout { grid-template-columns: 1fr; padding: 8px 16px 20px; }
  .ladder-toggle { display: grid; }

  .ladder {
    position: fixed;
    top: 76px;
    right: 16px;
    z-index: 40;
    width: 240px;
    max-width: calc(100vw - 32px);
    display: none;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
  }

  .ladder.open { display: block; }
}

@media (max-width: 600px) {
  .topbar { padding: 10px 16px; grid-template-columns: auto auto; }
  .topbar-right { grid-column: 2; grid-row: 1; }
  .timer { grid-column: 1 / -1; grid-row: 2; justify-self: center; }
  .lifelines { gap: 6px; }
  .lifeline { width: 52px; height: 36px; font-size: 12px; }
  .answers { grid-template-columns: 1fr; gap: 10px; }
  .question-box { padding: 20px 28px; min-height: 100px; }
  .answer { min-height: 52px; }
  .start-card { padding: 28px 18px; }
  .ladder { top: 66px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}