:root{color-scheme:light;--bg-base: #edf6fb;--bg-grad-start: #f4fcff;--bg-grad-mid: #daf2ff;--bg-grad-end: #bedef2;--text-primary: #0a5f8f;--text-muted: #246f95;--surface: #ffffff;--surface-soft: #f4fbff;--surface-soft-2: #e8f6ff;--border: #a6d2e6;--border-strong: #36a8d5;--shadow: 0 12px 30px rgba(10, 95, 143, .18);--accent: #22a7d7;--accent-strong: #0a86bf;--accent-contrast: #ffffff;--success: #1f9d60;--success-bg: #e9fbf3;--danger: #cc4334;--danger-bg: #fff1ef;--gold-strong: #db9b00;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;background:var(--bg-base);color:var(--text-primary);line-height:1.4}[data-theme=dark]{color-scheme:dark;--bg-base: #061a29;--bg-grad-start: #08243a;--bg-grad-mid: #0e3959;--bg-grad-end: #125074;--text-primary: #dcf4ff;--text-muted: #add9ee;--surface: #0c2b42;--surface-soft: #123a58;--surface-soft-2: #174968;--border: #2a6c93;--border-strong: #46bbe6;--shadow: 0 14px 34px rgba(3, 12, 20, .45);--accent: #4ac2ea;--accent-strong: #7fdcff;--accent-contrast: #052438;--success: #71d7a8;--success-bg: #123f31;--danger: #ff9d8e;--danger-bg: #4a2520;--gold-strong: #ffc83d}*{box-sizing:border-box}body{margin:0;min-height:100vh;overflow-wrap:anywhere;background:var(--bg-base);color:var(--text-primary)}.page-shell{--shell-padding: clamp(8px, 2vw, 18px);min-height:100vh;padding:var(--shell-padding);display:grid;place-items:center;background:linear-gradient(160deg,var(--bg-grad-start),var(--bg-grad-mid) 45%,var(--bg-grad-end) 100%)}.app-logo{width:clamp(140px,30vw,220px);height:auto;display:block;margin:20px auto 14px}.page-card{width:min(980px,100%);min-height:min(760px,calc(100vh - (var(--shell-padding) * 2)));position:relative;background:var(--surface);border-radius:16px;padding:clamp(14px,3vw,24px);box-shadow:var(--shadow);border:1px solid var(--border)}.page-content{width:100%}.theme-toggle{position:absolute;top:12px;right:12px;width:44px;height:44px;border-radius:999px;border:1px solid var(--border-strong);background:linear-gradient(135deg,var(--surface-soft),var(--surface-soft-2));color:var(--accent-strong);display:inline-flex;align-items:center;justify-content:center;cursor:pointer;transition:transform .18s ease,background .18s ease}.back-toggle{position:absolute;top:12px;left:12px;width:44px;height:44px;border-radius:999px;border:1px solid var(--border-strong);background:linear-gradient(135deg,var(--surface-soft),var(--surface-soft-2));color:var(--accent-strong);display:inline-flex;align-items:center;justify-content:center;cursor:pointer;transition:transform .18s ease,background .18s ease}.back-toggle:hover{transform:translateY(-1px);background:linear-gradient(135deg,var(--surface-soft-2),var(--surface-soft))}.back-toggle svg{width:42px;height:42px;fill:none;stroke:currentColor;stroke-width:3;stroke-linecap:round;stroke-linejoin:round}.theme-toggle:hover{transform:translateY(-1px);background:linear-gradient(135deg,var(--surface-soft-2),var(--surface-soft))}.theme-toggle svg{width:42px;height:42px;fill:none;stroke:currentColor;stroke-width:3;stroke-linecap:round;stroke-linejoin:round}h1,h2,h3,p{margin-top:0}h1,h2,h3,strong{color:var(--text-primary)}p,span,label,td,th{color:var(--text-muted)}.theme-list,.result-list{list-style:none;margin:16px 0 0;padding:0;display:grid;gap:12px}.theme-button,button{border:1px solid var(--border);background:linear-gradient(135deg,var(--surface-soft),var(--surface-soft-2));color:var(--text-primary);border-radius:10px;padding:12px 14px;font:inherit;font-size:.98rem;min-height:44px;cursor:pointer}.theme-button{width:100%;text-align:left;display:grid;gap:4px}.theme-button:hover,button:hover{background:linear-gradient(135deg,var(--surface-soft-2),var(--surface-soft));border-color:var(--border-strong)}.form,.quiz-form{display:grid;gap:12px}.home-username-field{display:grid;gap:4px;margin-bottom:12px}.home-about{margin:0 0 14px;padding:10px 12px;border:1px solid var(--border);border-radius:10px;background:var(--surface-soft);color:var(--text-primary)}.home-username-field label{display:block}.home-intro-text{margin-bottom:2px}.home-theme-list{margin-top:4px}.feedback-fab{position:fixed;right:clamp(14px,2.4vw,24px);bottom:clamp(14px,2.4vw,24px);width:52px;height:52px;border-radius:999px;border:1px solid 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th,.ranking-table td{border-bottom:1px solid var(--border);text-align:left;padding:8px 10px}.ranking-table th{background:var(--surface-soft)}.result-list+button{margin-top:12px}.link-button{margin-bottom:12px}.install-card{margin:14px 0 10px;padding:12px;border:1px solid var(--border-strong);border-radius:12px;background:var(--surface-soft)}.install-card p{margin-bottom:10px;color:var(--text-primary);font-weight:600}.install-actions{display:flex;gap:10px;flex-wrap:wrap}.install-actions .ghost-button{background:var(--surface)}#root>div>div>div>button{padding:1px 10px}.error{color:var(--danger);font-weight:600}.toast{margin-bottom:10px;padding:10px 12px;border-radius:10px;border:1px solid var(--border);background:var(--surface-soft);color:var(--text-primary);font-weight:600}.toast-error{border-color:var(--danger);background:var(--danger-bg);color:var(--danger)}button[type=submit]{border-color:var(--accent);background:linear-gradient(135deg,var(--accent),var(--accent-strong));color:var(--accent-contrast);font-weight:600}button[type=submit]:hover{filter:brightness(1.05)}.submit-inactive{opacity:.6;cursor:not-allowed}.submit-inactive:hover{filter:none}button:disabled{opacity:.6;cursor:not-allowed}@media (max-width: 700px){.page-shell{place-items:stretch}.page-card{width:100%;min-height:calc(100vh - (var(--shell-padding) * 2));padding-top:20px}.app-logo{margin-bottom:10px}h1{font-size:1.45rem}h2{font-size:1.2rem}.theme-list,.result-list{gap:10px}.question-card{padding:10px}.option-row{min-height:52px;padding:12px 14px;gap:12px}button,.theme-button{width:100%}.link-button{width:auto}.install-actions{flex-direction:column}.ranking-card-list{display:grid}.ranking-table-wrapper{display:none}}