*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --bg: #1a1a1a; --surface: #242424; --surface2: #2e2e2e; --border: #3a3a3a;
  --red: #e03535; --red-dim: #b02828; --red-glow: rgba(224,53,53,.35);
  --green: #2ecc71; --green-glow: rgba(46,204,113,.35);
  --text: #f0f0f0; --text-muted: #888; --radius: 12px; --radius-sm: 8px;
}
body { font-family: system-ui,-apple-system,sans-serif; background: var(--bg); color: var(--text); min-height: 100vh; display: flex; align-items: center; justify-content: center; }
.screen { display: none; width: 100%; max-width: 600px; padding: 24px 20px 40px; margin: 0 auto; }
.screen.active { display: flex; flex-direction: column; align-items: center; }

/* START */
.game-title { font-size: 56px; font-weight: 900; letter-spacing: -2px; margin-bottom: 6px; line-height: 1; }
.game-title span { color: var(--red); }
.game-sub { font-size: 14px; color: var(--text-muted); margin-bottom: 32px; }

.settings-grid { width: 100%; display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 16px; }
.setting-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 13px 16px; cursor: pointer; transition: border-color .15s, background .15s; position: relative; }
.setting-card:hover { border-color: #555; background: var(--surface2); }
.setting-label { font-size: 11px; color: var(--text-muted); text-transform: uppercase; letter-spacing: .08em; margin-bottom: 5px; }
.setting-value { font-size: 14px; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; padding-right: 18px; }
.setting-arrow { position: absolute; right: 14px; top: 50%; transform: translateY(-50%); color: var(--text-muted); font-size: 18px; }

.start-btn { width: 100%; padding: 16px; background: var(--red); border: none; border-radius: var(--radius); color: #fff; font-size: 17px; font-weight: 700; cursor: pointer; box-shadow: 0 4px 20px rgba(224,53,53,.3); transition: background .15s, transform .1s; }
.start-btn:hover { background: var(--red-dim); }
.start-btn:active { transform: scale(.98); }
.start-btn:disabled { opacity: .5; cursor: not-allowed; transform: none; }
.error { color: #ff6b6b; font-size: 13px; margin-top: 10px; text-align: center; }

/* SHEET */
.dropdown-overlay { position: fixed; inset: 0; background: rgba(0,0,0,.65); z-index: 100; display: flex; align-items: flex-end; justify-content: center; }
.dropdown-sheet { background: var(--surface); border-radius: 20px 20px 0 0; padding: 20px 20px 36px; width: 100%; max-width: 600px; max-height: 72vh; display: flex; flex-direction: column; }
.sheet-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; flex-shrink: 0; }
.sheet-title { font-size: 13px; text-transform: uppercase; letter-spacing: .08em; color: var(--text-muted); }
.sheet-done { background: var(--red); border: none; color: #fff; font-size: 13px; font-weight: 700; padding: 5px 14px; border-radius: 20px; cursor: pointer; font-family: inherit; }
.sheet-options-scroll { overflow-y: auto; flex: 1; }
.sheet-option { padding: 13px 16px; border-radius: var(--radius-sm); font-size: 15px; cursor: pointer; transition: background .12s; display: flex; align-items: center; justify-content: space-between; }
.sheet-option:hover { background: var(--surface2); }
.sheet-option.selected { color: var(--red); font-weight: 600; }
.sheet-option.selected::after { content: '✓'; font-size: 14px; }

/* QUIZ */
#quiz-screen { align-items: stretch; }
.quiz-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; }
.quiz-q-num { font-size: 13px; color: var(--text-muted); }
.quiz-score { background: var(--surface); border: 1px solid var(--border); border-radius: 20px; padding: 5px 14px; font-size: 14px; font-weight: 700; }
.quiz-score span { color: var(--red); }

.timer-pill { display: none; align-items: center; gap: 7px; background: var(--surface); border: 1px solid var(--border); border-radius: 20px; padding: 5px 12px 5px 10px; }
.timer-pill.visible { display: flex; }
.timer-icon { font-size: 15px; line-height: 1; }
.timer-ring { position: relative; width: 28px; height: 28px; flex-shrink: 0; }
.timer-ring svg { position: absolute; inset: 0; transform: rotate(-90deg); }
.timer-ring-bg { fill: none; stroke: var(--border); stroke-width: 3; }
.timer-ring-fill { fill: none; stroke: var(--green); stroke-width: 3; stroke-linecap: round; transition: stroke .3s; stroke-dasharray: 75.4; stroke-dashoffset: 0; }
.timer-num { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; font-size: 10px; font-weight: 700; color: var(--text); }

.progress-track { height: 3px; background: var(--border); border-radius: 2px; margin-bottom: 24px; }
.progress-fill { height: 3px; background: var(--red); border-radius: 2px; transition: width .35s; }
.q-category { font-size: 11px; text-transform: uppercase; letter-spacing: .08em; color: var(--text-muted); margin-bottom: 8px; }
.q-text { font-size: 19px; font-weight: 600; line-height: 1.5; margin-bottom: 22px; }
.options { display: flex; flex-direction: column; gap: 10px; }
.opt-btn { text-align: left; padding: 15px 18px; background: var(--surface); border: 1.5px solid var(--border); border-radius: var(--radius); color: var(--text); font-size: 15px; font-family: inherit; cursor: pointer; transition: border-color .15s, background .15s, box-shadow .2s; line-height: 1.4; }
.opt-btn:hover:not(:disabled) { border-color: #555; background: var(--surface2); }
.opt-btn:disabled { cursor: default; }
.opt-btn.correct { border-color: var(--green); background: rgba(46,204,113,.08); box-shadow: 0 0 0 3px var(--green-glow), 0 0 18px var(--green-glow); color: var(--green); font-weight: 600; }
.opt-btn.wrong { border-color: var(--red); background: rgba(224,53,53,.08); box-shadow: 0 0 0 3px var(--red-glow), 0 0 18px var(--red-glow); color: #ff6b6b; }
.opt-btn.reveal-correct { border-color: var(--green); background: rgba(46,204,113,.05); color: var(--green); }
.opt-btn.timed-out { border-color: #555; background: rgba(255,255,255,.03); color: var(--text-muted); }

.next-btn { margin-top: 20px; width: 100%; padding: 14px; background: var(--red); border: none; border-radius: var(--radius); color: #fff; font-size: 16px; font-weight: 700; font-family: inherit; cursor: pointer; opacity: 0; pointer-events: none; transition: opacity .25s, background .15s; box-shadow: 0 4px 20px rgba(224,53,53,.25); }
.next-btn.show { opacity: 1; pointer-events: all; }
.next-btn:hover { background: var(--red-dim); }

/* RESULTS */
#results-screen { align-items: stretch; }
.results-hero { background: var(--surface); border-radius: 16px; padding: 32px 24px; text-align: center; margin-bottom: 20px; border: 1px solid var(--border); }
.big-score { font-size: 60px; font-weight: 800; line-height: 1; color: var(--red); }
.score-denom { font-size: 22px; color: var(--text-muted); }
.score-pct { font-size: 15px; color: var(--text-muted); margin: 6px 0 14px; }
.verdict { font-size: 20px; font-weight: 700; }
.review-list { display: flex; flex-direction: column; gap: 8px; margin-bottom: 20px; }
.review-item { padding: 13px 16px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); }
.review-q { font-size: 13px; line-height: 1.45; margin-bottom: 6px; }
.review-ans { font-size: 12px; color: var(--text-muted); }
.tag { display: inline-block; font-size: 10px; font-weight: 700; padding: 2px 8px; border-radius: 20px; margin-right: 6px; text-transform: uppercase; letter-spacing: .04em; }
.tag-correct { background: rgba(46,204,113,.15); color: var(--green); }
.tag-wrong { background: rgba(224,53,53,.15); color: #ff6b6b; }
.tag-timeout { background: rgba(136,136,136,.15); color: var(--text-muted); }
.home-btn { width: 100%; padding: 15px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); color: var(--text); font-size: 16px; font-weight: 600; font-family: inherit; cursor: pointer; transition: background .15s; }
.home-btn:hover { background: var(--surface2); }

/* MULTIPLAYER */
.mp-entry-btn { width: 100%; margin-top: 10px; padding: 14px; background: transparent; border: 1.5px solid var(--border); border-radius: var(--radius); color: var(--text); font-size: 15px; font-weight: 600; font-family: inherit; cursor: pointer; transition: border-color .15s, background .15s; }
.mp-entry-btn:hover { border-color: #555; background: var(--surface); }

.mp-menu-btns { width: 100%; display: flex; flex-direction: column; gap: 10px; margin-top: 16px; }
.mp-big-btn { width: 100%; padding: 16px; background: var(--red); border: none; border-radius: var(--radius); color: #fff; font-size: 17px; font-weight: 700; font-family: inherit; cursor: pointer; box-shadow: 0 4px 20px rgba(224,53,53,.3); transition: background .15s, transform .1s; }
.mp-big-btn:hover { background: var(--red-dim); }
.mp-big-btn:active { transform: scale(.98); }
.mp-big-btn--secondary { background: var(--surface); border: 1.5px solid var(--border); color: var(--text); box-shadow: none; }
.mp-big-btn--secondary:hover { background: var(--surface2); border-color: #555; }
.mp-back-btn { background: none; border: none; color: var(--text-muted); font-size: 14px; font-family: inherit; cursor: pointer; padding: 10px; transition: color .15s; }
.mp-back-btn:hover { color: var(--text); }
.mp-leave-btn { background: none; border: 1px solid var(--border); color: var(--text-muted); font-size: 13px; font-family: inherit; cursor: pointer; padding: 6px 14px; border-radius: 20px; transition: border-color .15s, color .15s; }
.mp-leave-btn:hover { border-color: #555; color: var(--text); }

.mp-name-form { width: 100%; display: flex; flex-direction: column; gap: 10px; margin-top: 8px; }
.mp-text-input { width: 100%; padding: 14px 16px; background: var(--surface); border: 1.5px solid var(--border); border-radius: var(--radius); color: var(--text); font-size: 16px; font-family: inherit; outline: none; transition: border-color .15s; }
.mp-text-input:focus { border-color: var(--red); }
.mp-text-input::placeholder { color: var(--text-muted); }
.mp-code-input { text-transform: uppercase; letter-spacing: 4px; font-size: 22px; font-weight: 700; text-align: center; }

.mp-room-code { font-size: 42px; font-weight: 900; letter-spacing: 6px; font-variant-numeric: tabular-nums; color: var(--red); line-height: 1; margin: 4px 0 8px; }
.mp-host-header { width: 100%; display: flex; align-items: flex-start; justify-content: space-between; }

.mp-player-list { width: 100%; display: flex; flex-direction: column; gap: 6px; margin: 16px 0 8px; }
.mp-player-item { display: flex; align-items: center; gap: 10px; padding: 11px 14px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-sm); font-size: 14px; font-weight: 500; }
.mp-player-avatar { width: 28px; height: 28px; border-radius: 50%; background: var(--red); display: flex; align-items: center; justify-content: center; font-size: 12px; font-weight: 700; color: #fff; flex-shrink: 0; }
.mp-player-name { flex: 1; }
.mp-player-badge { font-size: 11px; color: var(--text-muted); background: var(--surface2); padding: 2px 8px; border-radius: 20px; }
.mp-waiting-hint { font-size: 13px; color: var(--text-muted); text-align: center; margin-bottom: 12px; }

/* MP QUIZ */
#mp-quiz { align-items: stretch; }
.player-tags { display: flex; flex-wrap: wrap; gap: 5px; margin-top: 8px; }
.player-tag { font-size: 11px; font-weight: 600; padding: 3px 9px; border-radius: 20px; background: rgba(255,255,255,.08); color: var(--text-muted); border: 1px solid var(--border); }
.player-tag--me { background: rgba(224,53,53,.12); color: var(--red); border-color: var(--red); }
.mp-waiting-others { display: flex; align-items: center; gap: 8px; margin-top: 16px; font-size: 13px; color: var(--text-muted); justify-content: center; }
.mp-waiting-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--text-muted); animation: mp-pulse 1.2s ease-in-out infinite; }
@keyframes mp-pulse { 0%,100% { opacity: .3; } 50% { opacity: 1; } }

/* MP LEADERBOARD */
#mp-leaderboard { align-items: stretch; }
.mp-lb-list { display: flex; flex-direction: column; gap: 8px; margin-top: 8px; width: 100%; }
.mp-lb-entry { display: flex; align-items: center; gap: 12px; padding: 14px 16px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); }
.mp-lb-entry--1st { border-color: #f0c040; background: rgba(240,192,64,.07); }
.mp-lb-entry--2nd { border-color: #aaa; background: rgba(170,170,170,.06); }
.mp-lb-entry--3rd { border-color: #c87533; background: rgba(200,117,51,.06); }
.mp-lb-rank { font-size: 22px; width: 36px; text-align: center; flex-shrink: 0; }
.mp-lb-name { flex: 1; font-size: 15px; font-weight: 600; }
.mp-lb-me { font-size: 11px; color: var(--red); font-weight: 700; margin-left: 6px; }
.mp-lb-score { font-size: 18px; font-weight: 800; color: var(--red); }

/* MP Host Disconnected Overlay */
.mp-disconnected-overlay { position: fixed; inset: 0; background: rgba(0,0,0,.7); z-index: 200; display: none; align-items: center; justify-content: center; padding: 24px; }
.mp-disconnected-overlay.visible { display: flex; }
.mp-disconnected-card { background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 32px 24px; max-width: 340px; width: 100%; text-align: center; }
.mp-disconnected-title { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.mp-disconnected-msg { font-size: 14px; color: var(--text-muted); margin-bottom: 24px; line-height: 1.5; }