:root{--bg: #fbfaf9;--hero-bg: oklch(20% .025 250);--hero-text: oklch(97% .005 250);--hero-muted: oklch(72% .02 250);--hero-line: oklch(34% .03 250);--text: oklch(20% .015 290);--muted: oklch(48% .015 290);--line: oklch(88% .01 290);--accent: oklch(50% .06 250);--accent-deep: oklch(42% .07 250);--on-accent: #fff;--on-accent-muted: oklch(88% .05 250);--faint-num: oklch(80% .01 290);--gold: oklch(70% .15 80);--expl-bg: oklch(96% .02 250);--green: oklch(50% .14 150);--green-bg: oklch(94% .05 150);--red: oklch(55% .18 25);--red-bg: oklch(94% .05 25);--rail-ghost: oklch(92% .01 290);--card: #ffffff;--bg-tint: transparent;--radius: 8px;--shadow-sm: none;--shadow-lift: 0 6px 18px rgba(15, 23, 42, .1)}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}html,body,#root{height:100%}body{margin:0;background:var(--bg);background-image:linear-gradient(180deg,var(--bg-tint) 0%,rgba(255,255,255,0) 340px);background-repeat:no-repeat;color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang TC,Noto Sans CJK TC,Microsoft JhengHei,sans-serif;font-size:16px;line-height:1.6}button{font-family:inherit;cursor:pointer}a{color:var(--accent)}.explanation-body a{word-break:break-all}svg.lucide{vertical-align:-.18em;flex:0 0 auto}.mode-t{display:inline-flex;align-items:center;gap:6px}.screen{max-width:720px;margin:0 auto;padding:max(16px,env(safe-area-inset-top)) 16px calc(24px + env(safe-area-inset-bottom))}.home{max-width:none;margin:0;padding:0}.hero{position:relative;overflow:hidden;background:var(--hero-bg);padding:max(40px,env(safe-area-inset-top)) 24px 0}.hero-inner{max-width:760px;margin:0 auto}.hero-top{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:34px}.hero-brand{display:flex;align-items:center;gap:10px;min-width:0}.hero-chip{width:36px;height:36px;border-radius:10px;flex:0 0 36px;display:flex;align-items:center;justify-content:center;background:var(--accent);color:var(--hero-bg)}.hero-eyebrow{font-size:.78rem;font-weight:700;letter-spacing:2px;text-transform:uppercase;color:var(--hero-muted)}.hero-tools{display:flex;align-items:center;gap:2px;flex:0 0 auto}.hero-tools button{background:none;border:none;color:var(--hero-muted);width:34px;height:34px;border-radius:999px;display:inline-flex;align-items:center;justify-content:center}.hero-tools button:hover{color:var(--hero-text);background:var(--hero-line)}.hero-title{margin:0;font-size:clamp(2.4rem,6vw,3.4rem);font-weight:800;letter-spacing:-1.2px;line-height:1.08;color:var(--hero-text)}.hero-sub{margin:18px 0 28px;font-size:1.02rem;color:var(--hero-muted);max-width:38ch;line-height:1.7}.hero-countdown{margin:0 0 34px}.hcd-eyebrow{display:block;font-size:.72rem;font-weight:700;letter-spacing:1px;color:var(--hero-muted);margin-bottom:5px}.hcd-row{display:flex;align-items:baseline;gap:7px;flex-wrap:wrap}.hcd-num{font-size:clamp(2rem,8vw,2.8rem);font-weight:800;color:var(--accent);font-variant-numeric:tabular-nums;line-height:1}.hcd-num.today{font-size:clamp(1.4rem,6vw,2rem);color:var(--hero-text)}.hcd-unit{font-size:1.1rem;font-weight:700;color:var(--hero-text)}.hcd-detail{font-size:.82rem;color:var(--hero-muted);margin-left:6px}.hero-stats{display:flex;flex-wrap:wrap;gap:18px 8px;border-top:1px solid var(--hero-line);padding-top:18px}.hstat{flex:1 1 38%;min-width:120px}.hstat b{display:block;font-size:clamp(1.3rem,5vw,2rem);font-weight:800;color:var(--hero-text);font-variant-numeric:tabular-nums}.hstat.accent b{color:var(--accent)}.hstat span{font-size:.72rem;color:var(--hero-muted);letter-spacing:.3px}.hero-ecg{display:block;width:100%;height:44px;margin-top:10px}.home-body{max-width:760px;margin:0 auto;padding:34px 24px calc(56px + env(safe-area-inset-bottom))}.section-eyebrow{margin:0 0 18px;font-size:.74rem;font-weight:700;letter-spacing:1.6px;text-transform:uppercase;color:var(--muted)}.mode-primary{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;background:var(--accent);border:none;border-radius:4px;padding:24px 26px;text-align:left;margin-bottom:2px}.mode-primary .mp-left{display:flex;align-items:center;gap:18px;min-width:0}.mode-primary .mp-num{font-size:.85rem;font-weight:800;color:var(--on-accent-muted);font-variant-numeric:tabular-nums;flex:0 0 auto}.mode-primary .mp-txt{display:flex;flex-direction:column;gap:3px;min-width:0}.mode-primary .mp-title{font-size:1.2rem;font-weight:700;color:var(--on-accent)}.mode-primary .mp-sub{font-size:.82rem;color:var(--on-accent-muted)}.mode-primary>svg{color:var(--on-accent);flex:0 0 auto}.mode-primary:active{transform:scale(.995)}.mode-primary.resume{background:transparent;border:1px solid var(--accent);border-radius:4px}.mode-primary.resume .mp-num,.mode-primary.resume .mp-title{color:var(--accent-deep)}.mode-primary.resume .mp-sub{color:var(--muted)}.mode-primary.resume>svg{color:var(--accent)}.mode-list{display:flex;flex-direction:column}.mode-row{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;background:transparent;border:none;border-bottom:1px solid var(--line);padding:20px 4px;text-align:left;color:var(--text)}.mode-row .mr-left{display:flex;align-items:center;gap:18px;min-width:0}.mode-row .mr-num{font-size:.85rem;font-weight:800;color:var(--faint-num);font-variant-numeric:tabular-nums;flex:0 0 auto}.mode-row .mr-txt{display:flex;flex-direction:column;gap:3px;min-width:0}.mode-row .mr-title{font-size:1.05rem;font-weight:650;color:var(--text)}.mode-row .mr-sub{font-size:.8rem;color:var(--muted)}.mode-row>svg{color:var(--muted);flex:0 0 auto}.mode-row:disabled{opacity:.45}.mode-row:active:not(:disabled){background:var(--expl-bg)}.mode-btn{display:flex;flex-direction:column;align-items:flex-start;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px;font-size:1.1rem;font-weight:600;color:var(--text);text-align:left;transition:.15s;box-shadow:var(--shadow-sm)}.mode-btn small{font-weight:400;font-size:.8rem;color:var(--muted);margin-top:2px}.mode-btn.primary{background:var(--accent);color:var(--on-accent);border-color:transparent}.mode-btn.primary small{color:var(--on-accent-muted)}.mode-btn:active{transform:scale(.99)}.mode-btn:disabled{opacity:.5;box-shadow:none}.mode-btn.mode-row-legacy{flex-direction:row;align-items:center;gap:13px}.mode-ico{flex:0 0 42px;width:42px;height:42px;border-radius:13px;display:flex;align-items:center;justify-content:center;background:var(--expl-bg);color:var(--accent)}.mode-btn.primary .mode-ico{background:#ffffff2e;color:var(--on-accent)}.mode-txt{display:flex;flex-direction:column;align-items:flex-start;min-width:0}.link-btn{background:none;border:none;color:var(--accent);text-decoration:underline;font-size:.85rem;padding:4px}.link-btn.danger{color:var(--muted)}.backup-links{display:flex;flex-wrap:wrap;justify-content:center;gap:4px 16px;margin-top:22px}.backup-area{width:100%;min-height:110px;resize:vertical;margin:8px 0;border:1px solid var(--line);border-radius:10px;padding:10px;font-family:ui-monospace,Menlo,Consolas,monospace;font-size:.78rem;word-break:break-all;box-sizing:border-box}.backup-btns{display:flex;gap:10px}.backup-btns .mode-btn{align-items:center;flex:1}.file-label{text-align:center}.backup-msg{color:var(--green);font-size:.85rem;margin:8px 0 0}.backup-err{color:var(--red);font-size:.85rem;margin:8px 0 0}.foot{text-align:center;color:var(--muted);font-size:.75rem;margin-top:28px}.topbar{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:12px}.topbar-title{font-weight:700;color:var(--accent);letter-spacing:1px;text-transform:uppercase;font-size:.9rem}.topbar-score{font-variant-numeric:tabular-nums;color:var(--muted);font-weight:600}.back{background:none;border:none;color:var(--accent);font-size:1rem;font-weight:600;padding:4px 0}.progress-bar{height:3px;background:var(--line);overflow:hidden;margin-bottom:16px}.progress-bar span{display:block;height:100%;background:var(--accent);transition:width .2s}.card{background:transparent;border:none;border-radius:0;padding:0;margin-bottom:16px;box-shadow:none}.q-meta{display:flex;align-items:center;gap:12px;font-size:.78rem;color:var(--muted);margin-bottom:16px}.q-index-ghost{font-size:1.8rem;font-weight:800;line-height:1;color:var(--rail-ghost);font-variant-numeric:tabular-nums;flex:0 0 auto}.q-meta-mid{flex:1;display:flex;flex-direction:column;gap:2px;min-width:0}.q-meta-line{font-size:.78rem;color:var(--muted)}.q-meta-chips{display:flex;align-items:center;flex-wrap:wrap;gap:2px}.q-stem{margin:0 0 20px;font-size:1.2rem;font-weight:600;line-height:1.7;color:var(--text)}.q-image{width:100%;border-radius:10px;margin-bottom:14px;display:block}.q-image-wrap{position:relative;margin-bottom:14px}.q-image-wrap .q-image{margin-bottom:0}.q-image-loading{display:flex;align-items:center;justify-content:center;height:160px;background:var(--bg);border:1px solid var(--line);border-radius:10px}.q-image-loading .spinner{width:30px;height:30px;border-width:3px}.q-image-missing{background:#fffbeb;border:1px dashed #f59e0b;color:#92400e;border-radius:10px;padding:12px;font-size:.85rem;margin-bottom:14px}.options{list-style:none;margin:0;padding:0;display:flex;flex-direction:column}.option{width:100%;display:flex;align-items:center;gap:16px;text-align:left;background:transparent;border:none;border-bottom:1px solid var(--line);border-left:3px solid transparent;padding:16px 4px 16px 16px;font-size:1rem;color:var(--text);transition:.12s}.option:active{background:var(--expl-bg)}.opt-letter{flex:0 0 30px;width:30px;height:30px;border-radius:999px;border:1.5px solid var(--line);background:transparent;color:var(--muted);font-weight:700;display:inline-flex;align-items:center;justify-content:center;font-size:.85rem}.opt-text{flex:1}.option.selected{border-left-color:var(--accent)}.option.selected .opt-letter{background:var(--accent);border-color:var(--accent);color:var(--on-accent)}.option.correct{border-left-color:var(--green)}.option.correct .opt-letter{background:var(--green);border-color:var(--green);color:var(--on-accent)}.option.wrong{border-left-color:var(--red)}.option.wrong .opt-letter{background:var(--red);border-color:var(--red);color:var(--on-accent)}.option:disabled{cursor:default}.opt-mark{flex:0 0 auto;align-self:center;font-weight:800;font-size:1.1rem}.option.correct .opt-mark{color:var(--green)}.option.wrong .opt-mark{color:var(--red)}.answer-box{margin-top:22px;padding:20px 22px;background:var(--expl-bg);border-left:3px solid var(--accent);font-size:.95rem;animation:fade-up .22s ease}@keyframes fade-up{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}@media(prefers-reduced-motion:reduce){.answer-box{animation:none}}.answer-box strong{color:var(--accent);font-size:1.1rem}.tag{margin-left:10px;padding:2px 11px;border-radius:999px;font-size:.76rem;font-weight:700}.tag.ok{background:var(--green-bg);color:var(--green)}.tag.ng{background:var(--red-bg);color:var(--red)}.explanation{margin:14px 0 0}.explanation-head{display:flex;align-items:center;gap:8px;font-weight:700;color:var(--accent);font-size:.7rem;letter-spacing:1.4px;text-transform:uppercase;margin-bottom:6px}.expl-draft{font-size:.7rem;font-weight:700;color:#92400e;background:#fffbeb;border:1px solid #f59e0b;border-radius:999px;padding:1px 8px}.explanation-body{color:var(--text);font-size:.95rem;line-height:1.7}.explanation-body :first-child{margin-top:0}.explanation-body :last-child{margin-bottom:0}.explanation-body h3{font-size:.92rem;color:var(--accent-deep);margin:14px 0 4px;padding-bottom:3px;border-bottom:1px solid var(--line)}.explanation-body p{margin:6px 0}.explanation-body ul,.explanation-body ol{margin:6px 0;padding-left:1.3em}.explanation-body li{margin:3px 0}.explanation-body blockquote{margin:8px 0;padding:4px 12px;border-left:3px solid var(--line);color:var(--muted);font-size:.85rem}.explanation-body code{background:var(--bg);padding:1px 5px;border-radius:4px;font-size:.85em}.nav{display:flex;gap:12px;position:sticky;bottom:0;z-index:40;background:var(--bg);padding:10px 0 calc(10px + env(safe-area-inset-bottom))}.nav button{flex:1;padding:15px;border-radius:4px;font-size:.95rem;font-weight:700;border:1px solid var(--line);background:var(--bg);color:var(--text)}.nav button.primary{background:var(--accent);color:var(--on-accent);border-color:var(--accent)}.nav button:disabled{opacity:.4}.kbd-hint{display:none}@media(hover:hover)and (min-width:720px){.kbd-hint{display:block;text-align:center;color:var(--muted);font-size:.78rem;margin:6px 0 0}}.count-picker{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:14px}.count-picker .mode-btn{align-items:center}.mock-limit{display:flex;align-items:center;gap:8px;font-size:.9rem;color:var(--text);margin-top:12px}.mock-limit input{width:18px;height:18px;accent-color:var(--accent)}.mock-custom{display:flex;gap:10px;margin-top:12px}.mock-custom input{flex:1;padding:9px 12px;border:1.5px solid var(--line);border-radius:10px;background:var(--card);color:var(--text);font-size:.95rem}.mock-custom .mode-btn{flex:0 0 auto;padding:9px 16px}.topbar-title.time-low{color:var(--red)}.mock-topic-row{display:flex;justify-content:space-between;align-items:center;padding:5px 0;border-bottom:1px solid var(--line);font-size:.9rem}.mock-topic-row:last-child{border-bottom:none}.mock-topic-name{color:var(--text)}.mock-topic-pct{font-variant-numeric:tabular-nums;color:var(--muted);font-weight:600}.mock-topic-pct.low{color:var(--red)}.jump-row{display:flex;align-items:center;gap:10px;margin-bottom:16px}.jump-row .progress-bar{flex:1;margin-bottom:0}.jump-toggle{flex:0 0 auto;background:#fff;border:1px solid var(--line);border-radius:999px;padding:5px 12px;font-size:.82rem;font-weight:600;color:var(--accent-deep)}.jump-panel{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:12px;margin-bottom:16px;max-height:46vh;overflow-y:auto}.jump-hint{font-size:.78rem;color:var(--muted);margin:0 0 6px;display:flex;align-items:center;gap:5px;flex-wrap:wrap}.jump-hint .dot{width:9px;height:9px;border-radius:50%;background:var(--accent);display:inline-block}.jump-hint .lg{width:12px;height:12px;border-radius:3px;display:inline-block;border:1px solid var(--line)}.jump-hint .lg.ok{background:var(--green-bg);border-color:var(--green)}.jump-hint .lg.no{background:var(--red-bg);border-color:var(--red)}.jump-note{font-size:.74rem;color:var(--muted);margin:0 0 10px}.grid-jump{display:grid;grid-template-columns:repeat(auto-fill,minmax(40px,1fr));gap:6px;margin:4px 0 16px}.jump.expl{position:relative}.jump.expl:after{content:"";position:absolute;top:3px;right:3px;width:7px;height:7px;border-radius:50%;background:var(--accent)}.jump{aspect-ratio:1;border:1px solid var(--line);background:var(--card);border-radius:8px;font-size:.8rem;color:var(--muted)}.jump.done{background:var(--expl-bg);border-color:var(--accent);color:var(--accent-deep)}.jump.done.ok{background:var(--green-bg);border-color:var(--green);color:var(--green);font-weight:700}.jump.done.no{background:var(--red-bg);border-color:var(--red);color:var(--red);font-weight:700}.jump.cur{outline:2px solid var(--accent);outline-offset:1px;font-weight:700}.result-summary{text-align:center}.big-score{font-size:3rem;font-weight:800;color:var(--accent);line-height:1}.big-score small{font-size:1rem;font-weight:600;margin-left:4px}.review-title{font-weight:700;color:var(--accent-deep);margin:8px 2px}.empty{text-align:center;color:var(--muted);margin:40px 0}.loading{min-height:60vh;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;color:var(--muted);font-size:.95rem}.spinner{width:38px;height:38px;border-radius:50%;border:4px solid var(--line);border-top-color:var(--accent);animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.picker-hint{color:var(--muted);font-size:.85rem;margin:0 2px 12px}.subject-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}.subject-btn{display:flex;flex-direction:column;align-items:flex-start;gap:2px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:14px 16px;color:var(--text);box-shadow:var(--shadow-sm);transition:.15s}.subject-name{font-size:1.05rem;font-weight:700}.subject-count{font-size:.78rem;color:var(--muted)}.subject-btn:active{transform:scale(.99)}.subject-stats{padding:0}.ss-row{display:flex;align-items:center;gap:10px;margin:12px 0}.ss-name{flex:0 0 7.5em;display:flex;align-items:center;gap:6px;font-size:.85rem;font-weight:600}.ss-dot{width:10px;height:10px;border-radius:50%;flex:0 0 10px}.ss-bar{flex:1;height:3px;background:var(--line);overflow:hidden}.ss-bar span{display:block;height:100%}.ss-num{flex:0 0 3.2em;text-align:right;font-size:.8rem;color:var(--muted);font-variant-numeric:tabular-nums}.subject-chip{display:inline-block;margin-left:6px;padding:1px 8px;border-radius:999px;font-size:.72rem;font-weight:700}.topic-chip{display:inline-block;margin-left:6px;padding:1px 7px;border-radius:6px;font-size:.7rem;font-weight:700;letter-spacing:.2px;color:var(--accent-deep);background:transparent;border:1px solid var(--accent)}.recycled-chip{display:inline-block;margin-left:6px;padding:1px 7px;border-radius:6px;font-size:.7rem;font-weight:700;letter-spacing:.2px;cursor:help;color:#9a5b00;background:#fff5e6;border:1px solid #f3cf95}[data-theme=dark] .recycled-chip{color:#f0c47e;background:#9a5b002e;border-color:#f3cf9559}.topic-bar{display:flex;gap:6px;overflow-x:auto;margin-bottom:12px;padding-bottom:2px;-webkit-overflow-scrolling:touch}.topic-pill{flex:0 0 auto;border:1px solid var(--line);background:var(--card);border-radius:999px;padding:5px 12px;font-size:.8rem;font-weight:600;color:var(--muted);white-space:nowrap}.topic-pill.on{background:var(--accent);border-color:var(--accent);color:#fff}.search-input{width:100%;padding:11px 14px;font-size:1rem;border:1.5px solid var(--line);border-radius:12px;background:var(--card);color:var(--text);margin-bottom:6px}.search-input:focus{outline:none;border-color:var(--accent)}.search-hint{font-size:.8rem;color:var(--muted);margin:0 0 12px}.search-list{display:flex;flex-direction:column;gap:8px}.search-item{text-align:left;border:1px solid var(--line);background:var(--card);border-radius:12px;padding:10px 12px;display:flex;flex-direction:column;gap:4px;box-shadow:var(--shadow-sm);transition:.15s}.search-item-meta{display:flex;align-items:center;gap:4px;flex-wrap:wrap}.search-item-meta .subject-chip,.search-item-meta .topic-chip{margin-left:0}.search-id{font-size:.74rem;color:var(--muted);font-variant-numeric:tabular-nums}.search-stem{font-size:.9rem;color:var(--text);line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.search-stem mark{background:#fde68a;color:inherit;border-radius:2px;padding:0 1px}[data-theme=dark] .search-stem mark{background:#92400e;color:#fef3c7}.foot p{margin:4px 0}.foot-disc{max-width:560px;margin:8px auto 0;line-height:1.5}.foot-thanks{margin-top:10px;font-size:11px;opacity:.45}.link-inline{background:none;border:none;color:var(--accent);text-decoration:underline;font-size:inherit;padding:0;margin-left:2px}.modal-backdrop{position:fixed;inset:0;background:#0f172a8c;display:flex;align-items:center;justify-content:center;padding:16px;z-index:100}.modal{background:#fff;border-radius:var(--radius);width:100%;max-width:640px;max-height:90vh;display:flex;flex-direction:column;overflow:hidden;padding:max(16px,env(safe-area-inset-top)) 0 calc(8px + env(safe-area-inset-bottom))}.modal-title{margin:0 18px;color:var(--accent-deep);font-size:1.25rem}.modal-updated{margin:2px 18px 8px;color:var(--muted);font-size:.78rem}.modal-body{overflow-y:auto;padding:4px 18px;-webkit-overflow-scrolling:touch}.disc-lead{background:var(--expl-bg);border:1px solid var(--line);border-radius:10px;padding:10px 12px;font-size:.9rem;color:var(--accent-deep)}.disc-sec{margin:14px 0}.disc-sec h3{margin:0 0 4px;font-size:.95rem;color:var(--text)}.disc-sec p{margin:4px 0;font-size:.86rem;color:var(--muted);line-height:1.65}.modal-actions{padding:10px 18px 0;border-top:1px solid var(--line);margin-top:4px}.modal-actions .mode-btn{align-items:center}.update-banner{position:fixed;left:50%;transform:translate(-50%);bottom:calc(12px + env(safe-area-inset-bottom));z-index:200;width:calc(100% - 24px);max-width:520px;display:flex;align-items:center;justify-content:space-between;gap:12px;background:var(--accent-deep);color:#fff;border-radius:12px;padding:10px 14px;box-shadow:0 6px 24px #0f172a4d}.update-text{font-size:.92rem;font-weight:600}.update-actions{display:flex;gap:8px;flex-shrink:0}.update-go{background:#fff;color:var(--accent-deep);border:none;border-radius:8px;padding:7px 14px;font-weight:700;cursor:pointer}.update-skip{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.5);border-radius:8px;padding:7px 12px;cursor:pointer}.ver-btn{position:relative}.ver-dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--red);margin-left:6px;vertical-align:middle}.about-date{font-weight:400;color:var(--muted);font-size:.8rem;margin-left:6px}.about-list{margin:4px 0 0;padding-left:18px}.about-list li{font-size:.86rem;color:var(--text);line-height:1.6;margin:3px 0}.about-hint{margin:6px 18px 2px;color:var(--muted);font-size:.78rem}.export-menu{position:relative;display:inline-block}.export-btn{background:var(--card);border:1px solid var(--line);color:var(--accent-deep);border-radius:10px;padding:8px 12px;font-size:.85rem;font-weight:600;cursor:pointer}.export-menu.compact .export-btn{padding:6px 10px;font-size:.8rem}.export-pop{position:absolute;right:0;z-index:60;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:0 8px 28px #0f172a2e;padding:6px;min-width:220px;display:flex;flex-direction:column;gap:2px}.export-pop.drop-up{bottom:calc(100% + 6px)}.export-pop.drop-down{top:calc(100% + 6px)}.export-pop button{display:flex;flex-direction:column;align-items:flex-start;text-align:left;background:none;border:none;border-radius:8px;padding:9px 10px;cursor:pointer;font-size:.9rem;color:var(--text)}.export-pop button:hover{background:#f1f5f9}.export-pop button small{color:var(--muted);font-size:.74rem;margin-top:1px}.export-pop .pop-t{display:inline-flex;align-items:center;gap:6px}.export-toast{position:absolute;right:0;z-index:60;background:var(--accent-deep);color:#fff;border-radius:8px;padding:7px 12px;font-size:.8rem;white-space:nowrap;box-shadow:0 6px 20px #0f172a40}.export-toast.drop-up{bottom:calc(100% + 6px)}.export-toast.drop-down{top:calc(100% + 6px)}.q-export-row{display:flex;justify-content:flex-end;align-items:center;gap:8px;margin-top:12px}.q-link-btn{border:1px solid var(--line);background:var(--card);color:var(--accent-deep);border-radius:8px;padding:6px 10px;font-size:.8rem;font-weight:600;white-space:nowrap}.manual-btn{margin-top:10px;background:var(--card);color:var(--accent-deep);border:1px solid var(--accent);border-radius:999px;padding:6px 16px;font-size:.85rem;font-weight:600;cursor:pointer;display:inline-flex;align-items:center;gap:5px}.manual-btn:hover{background:#eff6ff}.streak-line{display:flex;align-items:center;justify-content:center;gap:6px;color:#b45309;font-size:.88rem;font-weight:600;margin:-8px 0 14px}[data-theme=dark] .streak-line{color:#fbbf24}.foot-links{display:flex;flex-wrap:wrap;justify-content:center;gap:4px 18px;margin-bottom:8px}.update-modal{max-width:440px}.update-modal .modal-body .mode-btn{width:100%;margin-top:4px}.update-modal-actions{display:flex;gap:10px}.update-modal-actions .mode-btn{flex:1;align-items:center}.q-meta-right{display:inline-flex;align-items:center;gap:8px}.fav-btn{background:none;border:none;line-height:1;color:#cbd5e1;padding:0 2px;display:inline-flex;align-items:center}.fav-btn.on{color:var(--gold)}.report-btn{background:none;border:none;line-height:1;padding:0 2px;cursor:pointer;color:#d97706;opacity:.7;display:inline-flex;align-items:center}.report-btn:hover{opacity:1}.fb-tabs{display:flex;gap:8px;margin-bottom:14px}.fb-tab{flex:1;border:1.5px solid var(--line);background:var(--card);color:var(--muted);border-radius:10px;padding:9px 8px;font-size:.92rem;font-weight:600;cursor:pointer}.fb-tab.on{border-color:var(--accent);background:var(--accent);color:#fff}.fb-field{display:block;margin:12px 0}.fb-field>span{display:block;font-size:.85rem;color:var(--accent-deep);font-weight:600;margin-bottom:4px}.fb-input{width:100%;padding:9px 12px;border:1.5px solid var(--line);border-radius:10px;background:var(--card);color:var(--text);font-size:.95rem}.fb-input:focus,.fb-field .note-area:focus{outline:none;border-color:var(--accent)}.fb-field .note-area{min-height:96px}.fb-note{font-size:.8rem;color:var(--muted);line-height:1.55;margin:10px 0 0}.note-block{margin-top:12px;border-top:1px dashed var(--line);padding-top:10px}.note-toggle{background:none;border:none;color:var(--accent-deep);font-weight:600;font-size:.85rem;padding:2px 0}.note-area{width:100%;min-height:70px;resize:vertical;margin-top:8px;border:1px solid var(--line);border-radius:10px;padding:10px;font-family:inherit;font-size:.9rem;box-sizing:border-box}.stats-link-row{margin-top:12px}.stats-weak{color:#b45309;background:#fffbeb;border:1px solid #fcd34d;border-radius:10px;padding:8px 12px;font-size:.86rem;margin:0 0 12px}.stats-h{font-size:.95rem;color:var(--accent-deep);margin:16px 0 8px}.stats-row{display:flex;align-items:center;gap:10px;margin:6px 0;font-size:.85rem}.stats-name{flex:0 0 92px;display:inline-flex;align-items:center;gap:6px}.stats-bars{flex:1;display:flex;flex-direction:column;gap:3px}.stats-bars .ss-bar{height:6px;background:var(--line);border-radius:999px;overflow:hidden}.stats-bars .ss-bar span{display:block;height:100%;border-radius:999px}.stats-num{flex:0 0 96px;text-align:right;color:var(--muted);font-variant-numeric:tabular-nums}.stats-legend{color:var(--muted);font-size:.75rem;margin-top:10px}.hero-btns{display:flex;gap:8px;justify-content:center;flex-wrap:wrap}.mode-btn.resume{border-color:var(--accent)}.mode-btn.resume small{color:var(--accent-deep)}.search-box{position:relative;margin-bottom:6px}.search-box .search-input{margin-bottom:0;padding-right:40px}.search-clear{position:absolute;right:6px;top:50%;transform:translateY(-50%);background:none;border:none;color:var(--muted);font-size:1.15rem;line-height:1;padding:6px 8px}@media(hover:hover){.mode-btn:hover:not(:disabled):not(.primary){border-color:var(--accent);transform:translateY(-1px);box-shadow:var(--shadow-lift)}.mode-btn.primary:hover:not(:disabled){filter:brightness(1.07);transform:translateY(-1px)}.option:hover:not(:disabled){background:var(--expl-bg)}.mode-row:hover:not(:disabled){background:var(--expl-bg)}.mode-primary:not(.resume):hover{filter:brightness(1.06)}.mode-primary.resume:hover{background:var(--expl-bg)}.hero-tools button:hover{color:var(--hero-text);background:var(--hero-line)}.subject-btn:hover{border-color:var(--accent);transform:translateY(-1px);box-shadow:var(--shadow-lift)}.nav button:hover:not(:disabled):not(.primary){border-color:var(--accent)}.nav button.primary:hover:not(:disabled){background:var(--accent-deep);border-color:var(--accent-deep)}.jump:hover,.jump-toggle:hover{border-color:var(--accent)}.topic-pill:hover:not(.on){border-color:var(--accent);color:var(--accent-deep)}.search-item:hover{border-color:var(--accent);transform:translateY(-1px);box-shadow:var(--shadow-lift)}.manual-btn:hover{background:#eff6ff}[data-theme=dark] .manual-btn:hover{background:#60a5fa1f}[data-theme=dark] .mode-btn.primary:hover:not(:disabled),[data-theme=dark] .nav button.primary:hover:not(:disabled){color:#172554}}@media(min-width:720px){.modes{display:grid;grid-template-columns:1fr 1fr}.mode-btn.primary,.mode-btn.resume{grid-column:1 / -1}.stat b{font-size:1.55rem}.stat{padding:16px 4px}}:focus-visible{outline:2px solid var(--accent);outline-offset:2px}[data-theme=dark]{--bg: oklch(15% .015 250);--hero-bg: oklch(10% .02 250);--hero-text: oklch(96% .005 250);--hero-muted: oklch(62% .02 250);--hero-line: oklch(26% .03 250);--text: oklch(93% .008 290);--muted: oklch(63% .015 290);--line: oklch(28% .015 290);--accent: oklch(74% .05 250);--accent-deep: oklch(82% .05 250);--on-accent: oklch(14% .03 250);--on-accent-muted: oklch(28% .05 250);--faint-num: oklch(35% .01 290);--gold: oklch(78% .13 80);--expl-bg: oklch(24% .03 250);--green: oklch(74% .15 150);--green-bg: oklch(30% .06 150);--red: oklch(72% .16 25);--red-bg: oklch(32% .08 25);--rail-ghost: oklch(24% .015 290);--card: oklch(19% .02 250);--bg-tint: transparent;--shadow-sm: none;--shadow-lift: 0 6px 18px rgba(0, 0, 0, .45)}[data-theme=dark] body{background-image:linear-gradient(180deg,var(--bg-tint) 0%,rgba(15,23,42,0) 340px)}[data-theme=dark] .mode-ico{background:var(--expl-bg)}[data-theme=dark] .nav button,[data-theme=dark] .modal,[data-theme=dark] .export-pop,[data-theme=dark] .backup-area,[data-theme=dark] .note-area,[data-theme=dark] textarea{background:var(--card);color:var(--text)}[data-theme=dark] .topic-pill.on,[data-theme=dark] .fb-tab.on,[data-theme=dark] .update-banner,[data-theme=dark] .export-toast{color:var(--on-accent)}[data-theme=dark] .update-skip{color:var(--on-accent);border-color:#00000059}[data-theme=dark] .update-go{background:var(--on-accent);color:var(--accent-deep)}[data-theme=dark] .disc-lead{background:var(--expl-bg);color:var(--accent-deep);border-color:var(--hero-line)}[data-theme=dark] .expl-draft,[data-theme=dark] .q-image-missing,[data-theme=dark] .stats-weak{background:#f59e0b26;color:#fcd34d}[data-theme=dark] .explanation-body code,[data-theme=dark] .stat{background:var(--card)}[data-theme=dark] .export-btn{background:var(--card);color:var(--accent-deep)}