:root {
  --color-primary: #0d9488;
  --color-on-primary: #ffffff;
  --color-accent: #ea580c;
  --color-secondary: #0284c7;
  --color-background: #ffffff;
  --color-surface: #ffffff;
  --color-surface-2: #f8fafc;
  --color-foreground: #0f172a;
  --color-muted: #64748b;
  --color-border: #e2e8f0;
  --color-success: #16a34a;
  --color-danger: #dc2626;
  --color-rank-1: #ca8a04;
  --color-rank-2: #64748b;
  --color-rank-3: #b45309;
  --font-display: "Fredoka", system-ui, sans-serif;
  --font-body: "Nunito", system-ui, sans-serif;
  --radius: 16px;
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --shadow: 0 8px 24px rgba(15, 23, 42, 0.06);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  min-height: 100dvh;
  background: var(--color-background);
  color: var(--color-foreground);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.5;
}

body {
  background-color: #ffffff;
  background-image:
    radial-gradient(ellipse 80% 50% at 10% -10%, rgba(13, 148, 136, 0.08), transparent 50%),
    radial-gradient(ellipse 60% 40% at 100% 0%, rgba(234, 88, 12, 0.06), transparent 45%);
  background-attachment: fixed;
}

h1, h2, .brand, .brand-mini, .q-prompt, .play-prompt {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: 0.01em;
}

.hidden { display: none !important; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid transparent;
  border-radius: 12px;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 180ms var(--ease-out), background-color 180ms ease, border-color 180ms ease, opacity 180ms ease;
  touch-action: manipulation;
}

.btn:focus-visible {
  outline: 3px solid var(--color-secondary);
  outline-offset: 2px;
}

.btn:active:not(:disabled) {
  transform: scale(0.97);
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-on-primary);
}

.btn-primary:hover:not(:disabled) {
  background: #0d9488;
}

.btn-accent {
  background: var(--color-accent);
  color: #fff;
}

.btn-accent:hover:not(:disabled) {
  background: #b45309;
}

.btn-ghost {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-foreground);
}

.btn-ghost:hover:not(:disabled) {
  background: var(--color-surface-2);
}

.btn-danger {
  background: transparent;
  border-color: rgba(220, 38, 38, 0.35);
  color: var(--color-danger);
}

.btn-block {
  width: 100%;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 36px;
  padding: 0 14px;
  border-radius: 999px;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--color-muted);
}

.status-pill[data-status="open"] {
  background: rgba(22, 163, 74, 0.1);
  border-color: rgba(22, 163, 74, 0.35);
  color: #15803d;
}

.status-pill[data-status="show"] {
  background: rgba(2, 132, 199, 0.1);
  border-color: rgba(2, 132, 199, 0.3);
  color: #0369a1;
}

.status-pill[data-status="reveal"] {
  background: rgba(217, 119, 6, 0.12);
  border-color: rgba(217, 119, 6, 0.35);
  color: #b45309;
}

/* ===== Admin big screen ===== */
.admin-shell {
  display: grid;
  grid-template-columns: minmax(240px, 22vw) minmax(0, 1fr) minmax(280px, 26vw);
  gap: var(--space-2);
  min-height: 100dvh;
  padding: var(--space-2);
}

.panel {
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: var(--space-3);
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.panel-label {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: var(--space-2);
  color: var(--color-primary);
  flex-shrink: 0;
}

.qr-wrap {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 12px;
  display: grid;
  place-items: center;
  aspect-ratio: 1;
  max-width: 100%;
}

.qr-wrap img {
  width: 100%;
  height: auto;
  display: block;
}

.qr-url {
  margin: var(--space-2) 0 0;
  font-size: 0.85rem;
  color: var(--color-muted);
  word-break: break-all;
  text-align: center;
}

.stat-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2);
  margin-top: auto;
  padding-top: var(--space-3);
}

.stat {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: var(--space-2);
  text-align: center;
}

.stat-num {
  display: block;
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--color-accent);
}

.stat-label {
  font-size: 0.8rem;
  color: var(--color-muted);
}

.panel-stage {
  position: relative;
}

.stage-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
}

.brand,
.brand-mini {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.brand-main {
  font-size: clamp(1.05rem, 1.8vw, 1.35rem);
  color: var(--color-foreground);
  line-height: 1.25;
}

.brand-sub {
  font-size: clamp(0.95rem, 1.5vw, 1.15rem);
  color: var(--color-primary);
  font-weight: 600;
}

.stage-body {
  flex: 1;
  display: grid;
  place-items: center;
  text-align: center;
  padding: var(--space-2) 0;
}

.lobby-hero h1 {
  font-size: clamp(2.2rem, 4.5vw, 3.4rem);
  margin: 0 0 var(--space-2);
}

.lobby-hero p,
.board-note {
  color: var(--color-muted);
  margin: 0;
}

.q-meta {
  display: flex;
  justify-content: flex-start;
  gap: var(--space-2);
  color: var(--color-muted);
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.question-hero {
  width: 100%;
  max-width: 100%;
}

.question-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: clamp(16px, 3vw, 36px);
  align-items: center;
  width: 100%;
  text-align: left;
}

.question-main {
  min-width: 0;
}

.question-aside {
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 132px;
}

.qa-stat {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: 14px;
  padding: 14px 16px;
  text-align: center;
  box-shadow: var(--shadow);
}

.qa-value {
  display: inline-block;
  font-family: var(--font-display);
  font-size: clamp(2rem, 3.5vw, 2.8rem);
  font-weight: 700;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  color: var(--color-accent);
  transition: transform 220ms var(--ease-out);
}

.qa-value.bump {
  transform: scale(1.2);
}

.qa-unit {
  margin-left: 4px;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-foreground);
}

.qa-label {
  display: block;
  margin-top: 6px;
  font-size: 0.78rem;
  color: var(--color-muted);
  font-weight: 600;
}

#stat-question .qa-value {
  color: var(--color-primary);
}

#stat-timer .qa-value {
  color: var(--color-secondary);
}

.q-prompt,
.play-prompt {
  font-size: clamp(2.2rem, 6vw, 4.5rem);
  line-height: 1.2;
  margin: 0;
  max-width: 16ch;
  word-break: break-word;
  color: var(--color-foreground);
}

.q-hint,
.play-hint {
  color: var(--color-muted);
  min-height: 1.5em;
}

.reveal-box {
  margin-top: var(--space-3);
  padding: var(--space-2) var(--space-3);
  border-radius: 12px;
  background: rgba(22, 163, 74, 0.08);
  border: 1px solid rgba(22, 163, 74, 0.28);
  display: inline-block;
}

.reveal-box strong {
  display: block;
  font-family: var(--font-display);
  font-size: 2rem;
  margin-top: 4px;
}

.recent-correct {
  list-style: none;
  margin: var(--space-3) 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-start;
}

.recent-correct li {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 6px 12px;
  font-size: 0.9rem;
  animation: pop-in 280ms var(--ease-out);
}

@media (max-width: 900px) {
  .question-layout {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .q-meta,
  .recent-correct {
    justify-content: center;
  }

  .q-prompt {
    margin: 0 auto;
  }

  .question-aside {
    flex-direction: row;
    justify-content: center;
    flex-wrap: wrap;
    min-width: 0;
  }

  .qa-stat {
    min-width: 100px;
    flex: 1 1 100px;
  }
}

.host-bar {
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-2);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  align-items: center;
}

.host-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

input[type="text"],
input[type="password"] {
  min-height: 44px;
  padding: 0 14px;
  border-radius: 12px;
  border: 1px solid var(--color-border);
  background: #fff;
  color: var(--color-foreground);
  font: inherit;
  min-width: 160px;
}

input:focus-visible {
  outline: 3px solid var(--color-secondary);
  outline-offset: 2px;
}

.host-msg,
.form-msg {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.9rem;
  width: 100%;
}

.form-msg.is-ok { color: #15803d; }
.form-msg.is-err { color: #b91c1c; }

.panel-board {
  overflow: hidden;
}

.board-live-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-bottom: var(--space-2);
  flex-shrink: 0;
}

.qa-stat.compact {
  padding: 10px 8px;
}

.qa-stat.compact .qa-value {
  font-size: 1.55rem;
}

.qa-stat.compact .qa-unit {
  font-size: 0.9rem;
}

.qa-stat.compact .qa-label {
  margin-top: 4px;
  font-size: 0.72rem;
}

.board-live-stats .qa-stat:nth-child(1) .qa-value {
  color: var(--color-accent);
}

.board-live-stats .qa-stat:nth-child(2) .qa-value {
  color: var(--color-primary);
}

.board-live-stats .qa-stat:nth-child(3) .qa-value {
  color: var(--color-secondary);
}

.board-scroll {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  padding-right: 4px;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
}

.board-scroll.compact {
  max-height: 42vh;
}

.leaderboard {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.leaderboard li {
  display: grid;
  grid-template-columns: 40px 1fr auto;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 12px;
  background: var(--color-surface-2);
  border: 1px solid transparent;
  transition: transform 220ms var(--ease-out), background-color 220ms ease, border-color 220ms ease;
  font-variant-numeric: tabular-nums;
}

.leaderboard li.flash {
  border-color: rgba(217, 119, 6, 0.55);
  background: rgba(217, 119, 6, 0.12);
  transform: translateX(4px) scale(1.02);
}

.leaderboard .rank {
  font-family: var(--font-display);
  font-weight: 700;
  text-align: center;
}

.leaderboard li:nth-child(1) .rank { color: var(--color-rank-1); }
.leaderboard li:nth-child(2) .rank { color: var(--color-rank-2); }
.leaderboard li:nth-child(3) .rank { color: var(--color-rank-3); }

.leaderboard .score {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--color-accent);
}

.leaderboard .name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.leaderboard.compact li {
  padding: 8px 10px;
  font-size: 0.92rem;
}

.board-note {
  margin-top: var(--space-2);
  font-size: 0.78rem;
  flex-shrink: 0;
}

/* ===== Play mobile ===== */
.play-shell {
  max-width: 480px;
  margin: 0 auto;
  padding: max(var(--space-2), env(safe-area-inset-top)) var(--space-2) max(var(--space-3), env(safe-area-inset-bottom));
  min-height: 100dvh;
}

.play-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.brand-mini .brand-main {
  font-size: 0.95rem;
}

.brand-mini .brand-sub {
  font-size: 0.88rem;
}

.my-score {
  display: flex;
  align-items: baseline;
  gap: 8px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 6px 14px;
  box-shadow: var(--shadow);
  flex-shrink: 0;
}

.my-points {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-accent);
  font-variant-numeric: tabular-nums;
  transition: transform 220ms var(--ease-out);
}

.my-points.bump {
  transform: scale(1.3);
}

.join-card,
.play-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-3);
  box-shadow: var(--shadow);
}

.join-card h1 {
  margin: 0 0 8px;
  font-size: 2rem;
}

.lede {
  margin: 0 0 var(--space-3);
  color: var(--color-muted);
}

#join-form,
.answer-form {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

#join-form label,
.answer-form label {
  font-weight: 700;
  font-size: 0.9rem;
}

#join-form input,
.answer-form input {
  width: 100%;
  min-width: 0;
}

.play-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.play-prompt {
  font-size: clamp(1.8rem, 8vw, 2.6rem);
  text-align: center;
  margin: var(--space-2) 0;
}

.mini-board h2 {
  font-size: 1rem;
  margin: var(--space-2) 0 8px;
  color: var(--color-muted);
}

@keyframes pop-in {
  from {
    opacity: 0;
    transform: translateY(8px) scale(0.96);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

@media (max-width: 1024px) {
  .admin-shell {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto auto;
  }

  .panel-qr { order: 2; }
  .panel-stage { order: 1; min-height: 50vh; }
  .panel-board { order: 3; max-height: 50vh; }

  .board-scroll {
    max-height: none;
  }
}