:root {
  --ink: #226b78;
  --ink-dark: #164f5b;
  --muted: #527b84;
  --paper: #dcecef;
  --surface: #fffefa;
  --line: #cbdde1;
  --primary: #f4d276;
  --primary-dark: #e7bd50;
  --primary-soft: #fff3c8;
  --sky: #76a4b3;
  --coral: #e7826f;
  --mint: #65b89d;
  --gold: #f4d276;
  --danger: #a84d4d;
  --shadow: 0 18px 42px rgba(31, 88, 99, .13);
  color-scheme: light;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; background: var(--paper); color: var(--ink); }
body::before {
  content: ""; position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background:
    linear-gradient(180deg, rgba(255,255,255,.13), rgba(255,255,255,0) 28rem),
    radial-gradient(circle at 100% 18%, rgba(255,255,255,.34), transparent 28rem);
}
button, input, textarea { font: inherit; }
button { cursor: pointer; }
button:disabled { cursor: not-allowed; opacity: .56; }
a { color: inherit; }

.site-header { min-height: 112px; padding: 14px clamp(18px, 5vw, 72px); display: flex; align-items: center; justify-content: space-between; border-bottom: 5px solid rgba(255,255,255,.24); background: var(--sky); }
.brand { display: inline-flex; align-items: center; gap: 15px; color: var(--gold); font-weight: 900; text-decoration: none; text-transform: uppercase; letter-spacing: .025em; }
.brand-logo { width: 76px; height: 76px; border-radius: 20px; object-fit: cover; box-shadow: 0 8px 22px rgba(22,79,91,.18); }
.brand-copy { display: grid; line-height: 1; }
.brand-copy strong { font-family: "Trebuchet MS", ui-rounded, sans-serif; font-size: clamp(1.35rem, 2.5vw, 2rem); letter-spacing: .045em; }
.brand-copy small { margin-top: 8px; color: #fffefa; font-size: .72rem; letter-spacing: .19em; }
.header-actions { display: flex; align-items: center; gap: 12px; }
.connection-status { display: inline-flex; align-items: center; gap: 7px; color: #fffefa; font-size: .82rem; font-weight: 800; }
.connection-status::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--gold); box-shadow: 0 0 0 3px rgba(244,210,118,.2); }
.connection-status[data-state="online"]::before { background: #a7edc9; box-shadow: 0 0 0 3px rgba(167,237,201,.2); }
.connection-status[data-state="offline"]::before { background: #ffd0c8; box-shadow: 0 0 0 3px rgba(255,208,200,.2); }

.player-shell { width: min(820px, calc(100% - 32px)); margin: 0 auto; padding: 52px 0 70px; }
.hero { margin-bottom: 26px; }
.compact-hero h1 { margin: 5px 0 9px; color: var(--ink); font-size: clamp(2rem, 7vw, 3.25rem); line-height: 1; letter-spacing: .02em; text-transform: uppercase; }
.eyebrow, .step-label { margin: 0 0 7px; color: var(--ink); font-size: .72rem; font-weight: 900; letter-spacing: .14em; }
.subtitle, .muted { color: var(--muted); }
.subtitle { margin: 0; font-size: 1.04rem; }
.panel { border: 1px solid rgba(34,107,120,.08); border-radius: 22px; background: var(--surface); box-shadow: var(--shadow); }
.join-panel, .game-panel, .login-panel { padding: clamp(22px, 5vw, 38px); }
.join-panel h2, .login-panel h1 { margin: 0 0 5px; letter-spacing: -.035em; }
.game-content { min-height: 240px; }
.center-state { min-height: 215px; display: grid; place-content: center; text-align: center; }
.center-state .state-icon { width: 62px; height: 62px; margin: 0 auto 18px; display: grid; place-items: center; border-radius: 20px; background: var(--primary-soft); color: var(--ink); font-size: 1.8rem; font-weight: 900; transform: rotate(-3deg); }
.center-state h2 { margin: 0 0 8px; font-size: 1.65rem; letter-spacing: -.035em; }
.center-state p { margin: 0; color: var(--muted); }
.player-meta { display: flex; justify-content: space-between; gap: 10px; margin-bottom: 18px; color: var(--muted); font-size: .86rem; font-weight: 700; }
.timer { display: inline-grid; place-items: center; min-width: 54px; height: 37px; padding: 0 12px; border-radius: 99px; color: #fff; background: var(--ink); font-variant-numeric: tabular-nums; }
.timer.urgent { background: var(--danger); animation: pulse .8s ease-in-out infinite alternate; }
@keyframes pulse { to { transform: scale(1.045); } }
.question-prompt { margin: 0 0 22px; font-size: clamp(1.45rem, 5vw, 2.1rem); line-height: 1.14; letter-spacing: -.035em; }
.question-image { width: 100%; max-height: 320px; margin: 0 0 22px; object-fit: contain; border: 1px solid var(--line); border-radius: 18px; background: #f3f8f8; }
.image-fallback { padding: 22px; margin-bottom: 22px; border-radius: 18px; background: #f3f8f8; color: var(--muted); text-align: center; }
.choices { display: grid; gap: 11px; }
.choice { width: 100%; min-height: 58px; display: flex; align-items: center; gap: 13px; padding: 12px 16px; border: 1.5px solid var(--line); border-radius: 15px; color: var(--ink); background: #fff; text-align: left; font-weight: 750; transition: transform .12s, border-color .12s, background .12s; }
.choice-button { touch-action: manipulation; }
.choice-button:active:not(:disabled) { transform: scale(.99); }
.choice-button.selected { border-color: var(--primary-dark); background: var(--primary-soft); }
.choice-result.correct { border-color: var(--mint); background: #e8f7f1; }
.choice-result.incorrect { border-color: var(--coral); background: #fff0ee; }
.choice-key { flex: 0 0 auto; display: grid; place-items: center; width: 30px; height: 30px; border-radius: 9px; background: #e9f1f2; font-size: .8rem; }
.choice-count { margin-left: auto; color: var(--muted); font-size: .83rem; }
.answer-confirmation { margin: 15px 0 0; color: var(--ink); font-weight: 800; text-align: center; }
.submit-answer-button { width: 100%; min-height: 54px; margin-top: 18px; font-size: 1rem; }
.selection-hint { margin: 10px 0 0; color: var(--muted); font-size: .84rem; text-align: center; }
.results-heading { display: flex; align-items: end; justify-content: space-between; gap: 12px; margin-bottom: 18px; }
.results-heading h2 { margin: 0; letter-spacing: -.035em; }

.leaderboard { display: grid; gap: 8px; }
.leaderboard-row { display: grid; grid-template-columns: 36px 1fr auto; align-items: center; gap: 10px; min-height: 46px; padding: 8px 12px; border-radius: 13px; background: #eef5f5; }
.leaderboard-row.own { outline: 2px solid var(--primary-dark); background: var(--primary-soft); }
.leaderboard-rank { color: var(--muted); font-weight: 900; }
.leaderboard-name { overflow: hidden; font-weight: 750; text-overflow: ellipsis; white-space: nowrap; }
.leaderboard-score { font-variant-numeric: tabular-nums; font-weight: 900; }
.own-standing { margin-top: 13px; padding-top: 13px; border-top: 1px solid var(--line); }

.stack-form { display: grid; gap: 11px; margin-top: 20px; }
label, legend { color: var(--ink); font-size: .86rem; font-weight: 800; }
input[type="text"], input[type="password"], input[type="number"], input[type="url"], input:not([type]), textarea { width: 100%; min-height: 48px; padding: 10px 13px; border: 1.5px solid var(--line); border-radius: 12px; color: var(--ink); background: #fff; outline: none; }
textarea { resize: vertical; }
input:focus, textarea:focus { border-color: var(--primary-dark); box-shadow: 0 0 0 3px rgba(244,210,118,.3); }
input[aria-invalid="true"], textarea[aria-invalid="true"] { border-color: var(--danger); }
.button { min-height: 44px; padding: 10px 17px; border: 0; border-radius: 12px; font-weight: 850; }
.button.primary { color: var(--ink-dark); background: var(--primary); box-shadow: 0 8px 20px rgba(186,145,48,.2); }
.button.secondary { color: var(--ink-dark); background: var(--primary-soft); }
.button.danger { color: #fff; background: var(--danger); }
.button.ghost { color: #fffefa; background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.48); }
.button.small { min-height: 34px; padding: 6px 11px; font-size: .78rem; }
@media (hover: hover) and (pointer: fine) {
  .choice-button:hover:not(:disabled):not(.selected) { transform: translateY(-2px); border-color: var(--primary-dark); background: #fffaf0; }
  .button.primary:hover:not(:disabled) { background: var(--primary-dark); }
}
.notice { margin-bottom: 16px; padding: 12px 15px; border: 1px solid #e6c568; border-radius: 12px; color: var(--ink-dark); background: var(--primary-soft); }
.notice.error { border-color: #fac3c8; color: #812936; background: #fff0f1; }
.loading-orbit { width: 38px; height: 38px; margin: 78px auto; border: 4px solid #dce8ea; border-top-color: var(--primary-dark); border-radius: 50%; animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.noscript { margin: 20px; padding: 15px; background: #fff0f1; }

.login-shell { width: min(460px, calc(100% - 32px)); margin: 10vh auto 0; }
.admin-shell { width: min(1240px, calc(100% - 36px)); margin: 34px auto 70px; }
.admin-summary { display: flex; align-items: center; justify-content: space-between; gap: 30px; padding: 26px 28px; }
.admin-summary h1 { margin: 0 0 6px; letter-spacing: -.04em; }
.phase-label { margin: 0; color: var(--muted); font-weight: 750; text-transform: capitalize; }
.stat-grid { display: grid; grid-template-columns: repeat(4, minmax(80px, 1fr)); gap: 9px; }
.stat { min-width: 88px; padding: 11px 13px; border-radius: 14px; background: #edf4f5; }
.stat strong, .stat span { display: block; }
.stat strong { font-size: 1.35rem; font-variant-numeric: tabular-nums; }
.stat span { color: var(--muted); font-size: .72rem; font-weight: 700; }
.stat.accent { color: var(--ink-dark); background: var(--primary); }
.stat.accent span { color: rgba(22,79,91,.72); }
.admin-grid { display: grid; grid-template-columns: minmax(0, 1.45fr) minmax(300px, .8fr); gap: 18px; margin-top: 18px; align-items: start; }
.admin-grid > .panel { padding: 24px; }
.control-panel { grid-row: span 2; }
.section-heading { display: flex; align-items: center; justify-content: space-between; gap: 15px; margin-bottom: 20px; }
.section-heading h2 { margin: 0; letter-spacing: -.03em; }
.pill { padding: 7px 11px; border-radius: 99px; color: var(--ink-dark); background: var(--primary-soft); font-size: .75rem; font-weight: 850; }
.control-buttons { display: flex; flex-wrap: wrap; gap: 9px; padding-bottom: 20px; border-bottom: 1px solid var(--line); }
.current-question { padding-top: 20px; }
.current-question h3 { margin: 0 0 15px; font-size: 1.4rem; }
.answer-summary { display: grid; gap: 8px; margin-top: 14px; }
.answer-summary-row { display: grid; grid-template-columns: 28px 1fr auto; gap: 9px; align-items: center; padding: 9px 11px; border-radius: 10px; background: #eef5f5; }
.answer-summary-row.correct { outline: 2px solid var(--mint); }
.upload-form, .prepare-form { display: grid; gap: 11px; }
.upload-form { padding-bottom: 18px; border-bottom: 1px solid var(--line); }
.prepare-form { padding-top: 18px; }
.checkbox-row { display: flex; align-items: center; gap: 9px; width: fit-content; cursor: pointer; }
.checkbox-row input { width: 18px; height: 18px; margin: 0; accent-color: var(--ink); }
.checkbox-row:has(input:disabled) { cursor: default; opacity: .65; }
.inline-form { display: grid; grid-template-columns: 1fr auto; gap: 8px; align-items: center; }
input[type="file"] { max-width: 100%; color: var(--muted); font-size: .78rem; }
fieldset { min-width: 0; margin: 0; padding: 0; border: 0; }
legend { margin-bottom: 8px; }
.pack-list { display: grid; gap: 8px; max-height: 240px; overflow: auto; }
.pack-item { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; gap: 9px; align-items: center; padding: 10px; border: 1px solid var(--line); border-radius: 12px; }
.pack-title { overflow: hidden; font-weight: 800; text-overflow: ellipsis; white-space: nowrap; }
.pack-meta { color: var(--muted); font-size: .72rem; }
.pack-actions, .move-controls { display: flex; align-items: center; gap: 5px; }
.icon-button { width: 31px; height: 31px; display: inline-grid; place-items: center; border: 0; border-radius: 8px; color: var(--danger); background: #fff0ed; font-weight: 900; text-decoration: none; }
.pack-actions .icon-button { width: auto; min-width: 31px; padding: 0 8px; font-size: .72rem; }
.icon-button.neutral { color: var(--ink-dark); background: #edf4f5; }

.editor-shell { width: min(1380px, calc(100% - 36px)); margin: 34px auto 110px; }
.editor-heading { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 25px 28px; }
.editor-heading h1 { margin: 0 0 6px; letter-spacing: -.04em; }
.editor-heading p:last-child { margin: 0; }
.pack-fields { display: grid; grid-template-columns: minmax(260px, .8fr) minmax(360px, 1.2fr); gap: 18px; margin-top: 18px; padding: 24px; }
.field-group { display: grid; align-content: start; gap: 7px; }
.optional { color: var(--muted); font-size: .72rem; font-weight: 600; }
.field-error { margin: 0; color: var(--danger); font-size: .78rem; font-weight: 750; }
.editor-grid { display: grid; grid-template-columns: minmax(280px, .34fr) minmax(0, 1fr); gap: 18px; margin-top: 18px; align-items: start; }
.question-sidebar, .question-editor { padding: 24px; }
.question-sidebar { position: sticky; top: 18px; max-height: calc(100vh - 36px); overflow: auto; }
.section-heading.compact { margin-bottom: 13px; }
.section-heading.compact h2 { font-size: 1.1rem; }
.editor-question-list { display: grid; gap: 7px; }
.editor-question-item { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: 6px; padding: 6px; border: 1px solid var(--line); border-radius: 12px; background: #fff; }
.editor-question-item.selected { border-color: var(--primary-dark); background: var(--primary-soft); }
.editor-question-item.invalid:not(.selected) { border-color: #d99898; }
.question-select { min-width: 0; display: flex; align-items: center; gap: 9px; padding: 5px; border: 0; color: var(--ink); background: transparent; font-weight: 750; text-align: left; }
.question-select::after { content: ""; overflow: hidden; }
.question-number { flex: 0 0 auto; width: 27px; height: 27px; display: grid; place-items: center; border-radius: 8px; background: #e9f1f2; font-size: .72rem; }
.question-field-grid { display: grid; grid-template-columns: minmax(0, 1fr) 150px; gap: 18px; }
.question-field-grid .field-group:first-child { grid-column: 1 / -1; }
.choice-editor { display: grid; gap: 9px; margin-top: 24px; padding-top: 22px; border-top: 1px solid var(--line); }
.choice-editor legend { padding-top: 22px; font-size: 1.05rem; }
.choice-editor-row { display: grid; grid-template-columns: 24px minmax(0, 1fr) auto; align-items: center; gap: 9px; }
.choice-editor-row input[type="radio"] { width: 18px; height: 18px; accent-color: var(--ink); }
.choice-error { grid-column: 2 / -1; }
.editor-actions { position: fixed; z-index: 3; inset: auto 0 0; min-height: 78px; display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 12px max(18px, calc((100vw - 1380px) / 2)); border-top: 1px solid var(--line); background: rgba(255,254,250,.96); box-shadow: 0 -8px 24px rgba(31,88,99,.1); backdrop-filter: blur(8px); }
.editor-action-buttons { display: flex; gap: 9px; }
.editor-action-buttons .button { display: inline-flex; align-items: center; text-decoration: none; }
.validation-summary { color: var(--muted); font-size: .86rem; font-weight: 750; }

@media (max-width: 820px) {
  .admin-summary { align-items: stretch; flex-direction: column; }
  .stat-grid { grid-template-columns: repeat(4, 1fr); }
  .admin-grid { grid-template-columns: 1fr; }
  .control-panel { grid-row: auto; }
  .pack-fields, .editor-grid { grid-template-columns: 1fr; }
  .question-sidebar { position: static; max-height: 340px; }
}
@media (max-width: 520px) {
  .site-header { min-height: 78px; padding: 9px 14px; border-bottom-width: 3px; }
  .brand { gap: 9px; }
  .brand-logo { width: 52px; height: 52px; border-radius: 14px; }
  .brand-copy strong { font-size: 1rem; }
  .brand-copy small { margin-top: 5px; font-size: .55rem; }
  .connection-status { font-size: 0; }
  .player-shell { width: min(100% - 22px, 720px); padding-top: 29px; }
  .game-panel, .join-panel { border-radius: 20px; padding: 20px; }
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
  .admin-shell { width: min(100% - 22px, 1240px); margin-top: 18px; }
  .admin-grid > .panel, .admin-summary { padding: 19px; border-radius: 19px; }
  .inline-form { grid-template-columns: 1fr; }
  .editor-shell { width: min(100% - 22px, 1380px); margin-top: 18px; }
  .editor-heading, .question-sidebar, .question-editor, .pack-fields { padding: 19px; border-radius: 19px; }
  .editor-heading { align-items: flex-start; flex-direction: column; }
  .question-field-grid { grid-template-columns: 1fr; }
  .question-field-grid .field-group:first-child { grid-column: auto; }
  .choice-editor-row { grid-template-columns: 21px minmax(0, 1fr); }
  .choice-editor-row .move-controls { grid-column: 2; }
  .editor-actions { align-items: stretch; flex-direction: column; gap: 7px; padding: 10px 12px; }
  .editor-action-buttons { justify-content: flex-end; }
}