:root,[data-theme=light]{--bg: #f7f8fb;--bg-elevated: #ffffff;--bg-soft: #eef1f6;--surface: #ffffff;--surface-2: #f3f5f9;--ink: #1c2430;--ink-muted: #5a6574;--ink-faint: #8b95a5;--accent: #3d6b8c;--accent-soft: #e7eef4;--accent-strong: #2f5570;--highlight: #7a9bb8;--highlight-soft: #edf3f8;--danger: #c45c5c;--danger-soft: #f8eaea;--success: #3d8f6e;--success-soft: #e8f5ef;--warning: #b8863b;--border: rgba(28, 36, 48, .08);--border-strong: rgba(28, 36, 48, .14);--shadow: 0 12px 36px rgba(28, 36, 48, .06);--shadow-sm: 0 2px 10px rgba(28, 36, 48, .04);--nav: #1c2430;--nav-ink: #f7f8fb;--option-hover: #f0f4f8;--correct-bg: #e8f5ef;--wrong-bg: #f8eaea;--sheet-answered: #3d6b8c;--sheet-current: #7a9bb8;--radius: 12px;--radius-sm: 8px;--radius-lg: 18px;--font-display: "Fraunces", "Noto Sans SC", serif;--font-body: "Noto Sans SC", system-ui, sans-serif;--safe-bottom: env(safe-area-inset-bottom, 0px);--ease-out: cubic-bezier(.22, 1, .36, 1);--primary-fg: #f7f8fb;--scroll-thumb: rgba(28, 36, 48, .18);--scroll-thumb-hover: rgba(61, 107, 140, .45);--scroll-track: transparent;color-scheme:light}[data-theme=dark]{--bg: #12161c;--bg-elevated: #1a2028;--bg-soft: #232a34;--surface: #181e26;--surface-2: #222933;--ink: #e8edf4;--ink-muted: #9aa6b5;--ink-faint: #6d7a8b;--accent: #8bb4d0;--accent-soft: #243241;--accent-strong: #a6c8df;--highlight: #9bb8cc;--highlight-soft: #2a3540;--danger: #e09090;--danger-soft: #3a2428;--success: #7dba9a;--success-soft: #1e322a;--warning: #d4b07a;--border: rgba(155, 184, 204, .12);--border-strong: rgba(155, 184, 204, .22);--shadow: 0 14px 40px rgba(0, 0, 0, .45);--shadow-sm: 0 2px 12px rgba(0, 0, 0, .3);--nav: #0e1218;--nav-ink: #e8edf4;--option-hover: #24303c;--correct-bg: #1e322a;--wrong-bg: #3a2428;--sheet-answered: #8bb4d0;--sheet-current: #c5d6e4;--primary-fg: #12161c;--scroll-thumb: rgba(232, 237, 244, .2);--scroll-thumb-hover: rgba(139, 180, 208, .55);--scroll-track: transparent;color-scheme:dark}*,*:before,*:after{box-sizing:border-box}html,body,#root{min-height:100%}body{margin:0;font-family:var(--font-body);background:radial-gradient(900px 480px at 12% -12%,color-mix(in srgb,var(--highlight) 14%,transparent),transparent 55%),radial-gradient(700px 420px at 100% 0%,color-mix(in srgb,var(--accent) 8%,transparent),transparent 50%),var(--bg);color:var(--ink);line-height:1.55;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}*{scrollbar-width:thin;scrollbar-color:var(--scroll-thumb) var(--scroll-track)}*::-webkit-scrollbar{width:6px;height:6px}*::-webkit-scrollbar-track{background:var(--scroll-track)}*::-webkit-scrollbar-thumb{background:var(--scroll-thumb);border-radius:999px}*::-webkit-scrollbar-thumb:hover{background:var(--scroll-thumb-hover)}*::-webkit-scrollbar-corner{background:transparent}.scroll-panel{overflow:auto;overscroll-behavior:contain;-webkit-overflow-scrolling:touch}.card-panel.scroll-panel{max-width:100%;overflow-x:auto;overflow-y:visible}button,input,select,textarea{font:inherit;color:inherit}a{color:inherit;text-decoration:none}button{cursor:pointer;border:none;background:none}h1,h2,h3,h4{font-family:var(--font-display);font-weight:600;line-height:1.25;margin:0}p{margin:0}ul{margin:0;padding:0;list-style:none}.app-shell{min-height:100vh;min-height:100dvh;display:flex}.app-shell.pc{flex-direction:row}.app-shell.mobile{flex-direction:column;padding-bottom:calc(64px + var(--safe-bottom))}.sidebar{width:240px;flex-shrink:0;background:var(--nav);color:var(--nav-ink);display:flex;flex-direction:column;padding:28px 18px;position:sticky;top:0;height:100vh;height:100dvh}.sidebar-brand{font-family:var(--font-display);font-size:1.35rem;letter-spacing:.02em;margin-bottom:6px}.sidebar-sub{font-size:.78rem;opacity:.7;margin-bottom:28px}.nav-list{display:flex;flex-direction:column;gap:4px;flex:1}.nav-item{display:flex;align-items:center;gap:10px;padding:11px 14px;border-radius:12px;color:inherit;opacity:.78;transition:background .2s,opacity .2s,transform .15s}.nav-item:hover{opacity:1;background:#ffffff14}.nav-item.active{opacity:1;background:color-mix(in srgb,var(--highlight) 28%,transparent);color:#fff}[data-theme=dark] .nav-item.active{color:var(--nav-ink)}.sidebar-footer{border-top:1px solid rgba(255,255,255,.12);padding-top:16px;margin-top:16px;display:flex;flex-direction:column;gap:10px}.user-chip{font-size:.85rem;opacity:.85}.main-area{flex:1;min-width:0;display:flex;flex-direction:column}.topbar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:18px 28px 8px}.page{flex:1;padding:12px 28px 36px;max-width:1200px;width:100%;margin:0 auto}.page.narrow{max-width:760px}.page.wide{max-width:1400px}.mobile-top{display:flex;align-items:center;justify-content:space-between;padding:14px 16px 6px;position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--bg) 88%,transparent);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.mobile-brand{font-family:var(--font-display);font-size:1.15rem}.mobile-page{padding:8px 16px 24px}.tabbar{position:fixed;left:0;right:0;bottom:0;z-index:40;display:grid;grid-template-columns:repeat(5,1fr);gap:2px;padding:8px 6px calc(8px + var(--safe-bottom));background:var(--surface);border-top:1px solid var(--border);box-shadow:0 -8px 24px #0000000f}.tab-item{display:flex;flex-direction:column;align-items:center;gap:2px;padding:6px 2px;border-radius:10px;font-size:.68rem;color:var(--ink-faint)}.tab-item.active{color:var(--accent);background:var(--accent-soft)}.tab-item .ico{font-size:1.15rem;line-height:1}.card-panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);padding:20px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 18px;border-radius:999px;border:1px solid transparent;font-weight:600;transition:transform .15s,background .2s,border-color .2s,opacity .2s;white-space:nowrap}.btn:active{transform:scale(.98)}.btn:disabled{opacity:.45;cursor:not-allowed}.btn-primary{background:var(--accent);color:var(--primary-fg);box-shadow:0 8px 20px color-mix(in srgb,var(--accent) 28%,transparent)}.btn-primary:hover:not(:disabled){background:var(--accent-strong);transform:translateY(-1px)}.btn-ghost{background:transparent;border-color:var(--border-strong);color:var(--ink)}.btn-ghost:hover:not(:disabled){background:var(--bg-soft)}.btn-soft{background:var(--accent-soft);color:var(--accent)}.btn-danger{background:var(--danger-soft);color:var(--danger)}.btn-block{width:100%}.btn-lg{padding:14px 22px;font-size:1.05rem;border-radius:16px}.btn-sm{padding:6px 12px;font-size:.85rem}.grid-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px}.home-hero{display:grid;gap:18px;margin-bottom:22px}.home-hero h1{font-size:clamp(1.8rem,3vw,2.4rem)}.home-hero p{color:var(--ink-muted);max-width:42em}.stat-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}.stat-pill{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:14px 16px}.stat-pill .num{font-family:var(--font-display);font-size:1.55rem;color:var(--accent)}.stat-pill .label{font-size:.8rem;color:var(--ink-faint)}.feature-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:18px;box-shadow:var(--shadow-sm);transition:transform .18s,box-shadow .18s;display:flex;flex-direction:column;gap:8px;min-height:140px}.feature-card h3{font-size:1.15rem}.feature-card p{color:var(--ink-muted);font-size:.9rem;flex:1}.feature-card .meta{font-size:.78rem;color:var(--ink-faint)}.practice-layout{display:grid;gap:16px}.practice-layout.pc{grid-template-columns:minmax(0,1fr) 280px;align-items:start}.practice-toolbar{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-bottom:12px}.chip{display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:999px;background:var(--bg-soft);color:var(--ink-muted);font-size:.82rem}.chip.active{background:var(--accent-soft);color:var(--accent);font-weight:600}.question-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:22px;box-shadow:var(--shadow-sm)}.q-meta{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-bottom:14px}.q-stem{font-size:1.12rem;font-weight:600;margin-bottom:18px;white-space:pre-wrap}.option-list{display:flex;flex-direction:column;gap:10px}.option-item{display:flex;gap:12px;align-items:flex-start;text-align:left;padding:14px 16px;border-radius:14px;border:1.5px solid var(--border);background:var(--surface-2);transition:border-color .15s,background .15s,transform 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var(--border);border-radius:var(--radius-lg);padding:16px;box-shadow:var(--shadow-sm);position:sticky;top:16px;max-height:calc(100vh - 32px);overflow:auto;overscroll-behavior:contain;scrollbar-gutter:stable}.answer-sheet h3{font-size:1rem;margin-bottom:12px}.sheet-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(36px,1fr));gap:6px}.sheet-cell{aspect-ratio:1;border-radius:8px;border:1px solid var(--border);background:var(--bg-soft);font-size:.75rem;font-weight:600;color:var(--ink-muted);display:grid;place-items:center}.sheet-cell.answered{background:var(--sheet-answered);color:var(--bg);border-color:transparent}[data-theme=dark] .sheet-cell.answered{color:#1c1c1a}.sheet-cell.wrong{background:var(--danger);color:#fff;border-color:transparent}.sheet-cell.correct-mark{background:var(--success);color:#fff;border-color:transparent}.sheet-cell.current{outline:2px solid 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.blob-b{width:380px;height:380px;right:-80px;bottom:8%;background:color-mix(in srgb,var(--accent) 18%,transparent);animation-delay:-3s}.login-bg .moon{position:absolute;width:120px;height:120px;right:12%;top:12%;border-radius:50%;background:radial-gradient(circle at 35% 35%,#ffffff,color-mix(in srgb,var(--highlight) 40%,#fff) 55%,transparent 72%);opacity:.55;filter:blur(1px);animation:pulse-soft 4s var(--ease-out) infinite}.login-bg .petal{display:none}.login-theme{position:fixed;top:16px;right:16px;z-index:5}.login-card{position:relative;z-index:1;width:min(420px,100%);background:color-mix(in srgb,var(--surface) 92%,transparent);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border:1px solid var(--border);border-radius:28px;padding:36px 30px 30px;box-shadow:var(--shadow)}.login-eyebrow{font-size:.78rem;letter-spacing:.12em;color:var(--accent);font-weight:600;margin-bottom:10px}.login-card h1{font-size:2rem;margin-bottom:6px}.login-card .sub{color:var(--ink-muted);margin-bottom:26px;font-size:.92rem}.login-welcome{position:relative;z-index:1;text-align:center;padding:40px 28px}.login-welcome .welcome-mark{width:64px;height:64px;margin:0 auto 18px;border-radius:50%;display:grid;place-items:center;font-family:var(--font-display);font-size:1.6rem;color:var(--primary-fg);background:linear-gradient(145deg,var(--accent),var(--highlight));box-shadow:0 12px 28px color-mix(in srgb,var(--accent) 35%,transparent);animation:pulse-soft 1.2s var(--ease-out) infinite}.login-welcome h1{font-size:1.9rem;margin-bottom:8px}.login-welcome p{color:var(--ink-muted)}.field{display:flex;flex-direction:column;gap:6px;margin-bottom:14px}.field label{font-size:.85rem;color:var(--ink-muted);font-weight:500}.field input,.field select{padding:12px 14px;border-radius:12px;border:1.5px solid var(--border);background:var(--bg-elevated);outline:none;transition:border-color .15s}.field input:focus,.field select:focus{border-color:var(--accent)}.error-tip{color:var(--danger);font-size:.88rem;margin-bottom:10px}.exam-header{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px}.timer{font-family:var(--font-display);font-size:1.4rem;font-variant-numeric:tabular-nums;padding:8px 16px;border-radius:12px;background:var(--accent-soft);color:var(--accent)}.timer.warn{background:var(--danger-soft);color:var(--danger)}.result-hero{text-align:center;padding:28px 16px}.result-score{font-family:var(--font-display);font-size:4rem;color:var(--accent);line-height:1}.result-pass{display:inline-block;margin-top:10px;padding:6px 14px;border-radius:999px;font-weight:700}.result-pass.ok{background:var(--success-soft);color:var(--success)}.result-pass.fail{background:var(--danger-soft);color:var(--danger)}.table{width:100%;border-collapse:collapse;font-size:.92rem}.table th,.table td{text-align:left;padding:12px 10px;border-bottom:1px solid var(--border)}.table th{color:var(--ink-faint);font-weight:600;font-size:.8rem}.row-actions{display:flex;flex-wrap:wrap;gap:6px}.section-title{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:8px 0 16px}.section-title h2{font-size:1.4rem}.muted{color:var(--ink-muted)}.faint{color:var(--ink-faint);font-size:.85rem}.kbd-hint{font-size:.78rem;color:var(--ink-faint)}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000073;z-index:100;display:grid;place-items:center;padding:20px}.modal{width:min(440px,100%);background:var(--surface);border-radius:18px;padding:22px;border:1px solid var(--border);box-shadow:var(--shadow)}.modal h3{margin-bottom:14px}.modal-actions{display:flex;justify-content:flex-end;gap:8px;margin-top:18px}.sheet-drawer-btn{position:fixed;right:16px;bottom:calc(76px + var(--safe-bottom));z-index:30;width:52px;height:52px;border-radius:50%;background:var(--accent);color:var(--bg);font-weight:700;box-shadow:var(--shadow)}[data-theme=light] .sheet-drawer-btn{color:#f3ebe0}.sheet-drawer{position:fixed;top:0;right:0;bottom:0;left:0;z-index:50;background:#0006;display:flex;align-items:flex-end}.sheet-drawer-panel{width:100%;max-height:70vh;overflow:auto;overscroll-behavior:contain;background:var(--surface);border-radius:20px 20px 0 0;padding:18px 16px calc(20px + var(--safe-bottom))}.data-table-wrap{overflow:auto;overscroll-behavior:contain;border-radius:var(--radius);border:1px solid var(--border);background:var(--surface)}@media (max-width: 900px){.stat-strip{grid-template-columns:repeat(2,1fr)}.practice-layout.pc{grid-template-columns:1fr}.page{padding:8px 16px 24px}.topbar{padding:12px 16px 4px}.question-card{padding:16px}.btn-lg{min-height:48px}}@keyframes fadeUp{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeScale{0%{opacity:0;transform:scale(.94)}to{opacity:1;transform:scale(1)}}@keyframes float-soft{0%{transform:translateY(0) translate(0)}to{transform:translateY(18px) translate(12px)}}@keyframes petal-fall{0%{transform:translateY(-10vh) rotate(0);opacity:0}10%{opacity:.4}to{transform:translateY(110vh) rotate(220deg);opacity:0}}@keyframes pulse-soft{0%,to{transform:scale(1)}50%{transform:scale(1.05)}}@keyframes shake{0%,to{transform:translate(0)}25%{transform:translate(-5px)}75%{transform:translate(5px)}}@keyframes toastIn{0%{opacity:0;transform:translateY(-8px) scale(.96)}to{opacity:1;transform:translateY(0) scale(1)}}.fade-up{animation:fadeUp .45s var(--ease-out) both}.fade-scale{animation:fadeScale .5s var(--ease-out) both}.shake{animation:shake .35s ease}.feature-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:color-mix(in srgb,var(--accent) 35%,var(--border))}.toast-host{position:fixed;top:18px;left:50%;transform:translate(-50%);z-index:1000;display:flex;flex-direction:column;gap:10px;width:min(420px,calc(100vw - 24px));pointer-events:none}.toast{pointer-events:auto;display:flex;align-items:flex-start;gap:12px;padding:14px 16px;border-radius:16px;background:var(--surface);border:1px solid var(--border);box-shadow:var(--shadow);animation:toastIn .35s var(--ease-out) both}.toast-success{border-color:color-mix(in srgb,var(--success) 35%,var(--border))}.toast-error{border-color:color-mix(in srgb,var(--danger) 35%,var(--border))}.toast-ico{width:28px;height:28px;border-radius:50%;display:grid;place-items:center;flex-shrink:0;font-weight:700;font-size:.85rem}.toast-success .toast-ico{background:var(--success-soft);color:var(--success)}.toast-error .toast-ico{background:var(--danger-soft);color:var(--danger)}.toast-info .toast-ico{background:var(--accent-soft);color:var(--accent)}.toast-body{flex:1;min-width:0}.toast-title{font-weight:600;font-size:.95rem}.toast-msg{margin-top:2px;font-size:.82rem;color:var(--ink-muted)}.toast-close{opacity:.45;font-size:1.2rem;line-height:1;padding:0 2px}.toast-close:hover{opacity:.9}@media (prefers-reduced-motion: reduce){.fade-up,.fade-scale,.shake,.toast,.login-bg .blob,.login-bg .petal,.welcome-mark{animation:none!important}}