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var(--dur-fast);font-family:var(--font-reading-sans)}.input-card:hover{border-color:var(--border-strong);background:var(--bg-secondary);transform:translateY(-2px)}.input-card .ic-title{font-size:13.5px;font-weight:600;color:var(--fg1);display:flex;align-items:center;gap:7px}.input-card .ic-sub{font-size:12px;color:var(--fg3);line-height:1.5}.modal-backdrop{position:fixed;inset:0;z-index:80;background:color-mix(in srgb,var(--fg1) 28%,transparent);backdrop-filter:blur(4px);display:grid;place-items:center;padding:22px;animation:backdropIn var(--dur-fast) var(--ease-standard)}.modal{width:min(620px,100%);background:var(--bg-secondary);border:1px solid var(--border-subtle);border-radius:var(--radius-xl);box-shadow:var(--shadow-xl);padding:22px;display:flex;flex-direction:column;gap:14px;animation:modalIn var(--dur-normal) var(--ease-standard)}.modal-head{display:flex;justify-content:space-between;align-items:baseline}.modal h3{font-family:var(--font-reading-serif);font-size:18px;font-weight:600;margin:0;color:var(--fg1)}.modal .modal-sub{font-size:12px;color:var(--fg3);font-family:var(--font-reading-sans)}.modal textarea,.modal input[type=url]{width:100%;font-family:var(--font-mono);font-size:13px;padding:12px 14px;background:var(--bg-primary);color:var(--fg1);border:1px solid var(--border-default);border-radius:var(--radius-md);outline:none;transition:border-color var(--dur-fast);resize:vertical}.modal textarea{min-height:220px;line-height:1.5}.modal textarea:focus,.modal input[type=url]:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-subtle)}.modal-foot{display:flex;justify-content:space-between;align-items:center;gap:10px}.modal-foot .err{font-size:12px;color:var(--error);font-family:var(--font-reading-sans)}.reader-stage{display:flex;justify-content:center;padding:48px 22px 96px;position:relative}.reader-stage.has-toc{padding-left:max(22px,calc(50vw - 600px))}.reader-article{width:100%;max-width:var(--reader-width, 720px);animation:fadeUp var(--dur-slow) var(--ease-standard) both}.reader-meta{margin-bottom:28px;padding-bottom:18px;border-bottom:1px solid var(--border-subtle);display:flex;flex-wrap:wrap;gap:8px 16px;align-items:center;font-family:var(--font-reading-sans);font-size:12px;color:var(--fg3);letter-spacing:.02em}.reader-meta .dot{width:3px;height:3px;background:var(--fg3);border-radius:50%}.toc-panel{position:fixed;top:80px;left:22px;width:240px;max-height:calc(100vh - 120px);overflow-y:auto;font-family:var(--font-reading-sans);font-size:13px;padding:14px 0 14px 14px;border-left:1px solid var(--border-subtle);z-index:10;animation:fadeIn var(--dur-normal) var(--ease-standard)}.toc-panel .toc-head{font-family:var(--font-mono);font-size:10px;letter-spacing:var(--tracking-label);text-transform:uppercase;color:var(--fg3);margin-bottom:12px;padding-left:4px}.toc-panel a{display:block;padding:5px 8px 5px 4px;color:var(--fg2);text-decoration:none;line-height:1.45;border-left:2px solid transparent;margin-left:-1px;transition:color var(--dur-fast),border-color var(--dur-fast);cursor:pointer}.toc-panel a:hover{color:var(--fg1)}.toc-panel a.active{color:var(--accent);border-left-color:var(--accent)}.toc-panel a.lvl-2{padding-left:16px;font-size:12.5px}.toc-panel a.lvl-3{padding-left:28px;font-size:12px;color:var(--fg3)}.toc-panel a.lvl-3:hover{color:var(--fg2)}@media (max-width: 1100px){.toc-panel{display:none}.reader-stage.has-toc{padding-left:22px}}.first-time-hint{position:fixed;bottom:24px;left:50%;transform:translate(-50%);background:var(--fg1);color:var(--bg-primary);padding:12px 16px 12px 14px;border-radius:var(--radius-full);font-size:13px;font-family:var(--font-reading-sans);display:flex;align-items:center;gap:10px;z-index:70;box-shadow:var(--shadow-lg);animation:tipIn var(--dur-slow) .6s var(--ease-standard) both;max-width:calc(100vw - 32px)}.first-time-hint .x{background:color-mix(in srgb,var(--bg-primary) 20%,transparent);border:none;color:inherit;width:22px;height:22px;border-radius:50%;cursor:pointer;display:grid;place-items:center;flex-shrink:0}.first-time-hint .x:hover{background:color-mix(in srgb,var(--bg-primary) 30%,transparent)}.toast{position:fixed;bottom:24px;left:50%;transform:translate(-50%);background:var(--fg1);color:var(--bg-primary);padding:10px 16px;border-radius:var(--radius-full);font-size:13px;font-family:var(--font-reading-sans);z-index:90;box-shadow:var(--shadow-lg);animation:toastIn var(--dur-normal) var(--ease-standard),toastOut var(--dur-normal) var(--ease-standard) 1.8s forwards;display:flex;gap:8px;align-items:center}.footer-help{margin-top:12px;font-size:12px;color:var(--fg3);font-family:var(--font-reading-sans);text-align:center}.footer-help a{color:var(--fg2);text-decoration:underline;text-underline-offset:3px;cursor:pointer}.footer-help a:hover{color:var(--accent)}.drag-overlay{position:fixed;inset:0;background:color-mix(in srgb,var(--accent) 10%,transparent);border:3px dashed var(--accent);z-index:200;display:grid;place-items:center;pointer-events:none;animation:fadeIn var(--dur-fast);font-family:var(--font-reading-sans)}.drag-overlay .label{background:var(--bg-secondary);padding:20px 32px;border-radius:var(--radius-xl);border:1px solid var(--border-default);box-shadow:var(--shadow-lg);font-size:16px;color:var(--fg1);display:flex;align-items:center;gap:12px}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes fadeUp{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}@keyframes tipIn{0%{opacity:0;transform:translate(-50%) translateY(20px)}to{opacity:1;transform:translate(-50%) translateY(0)}}@keyframes toastIn{0%{opacity:0;transform:translate(-50%) translateY(14px)}to{opacity:1;transform:translate(-50%) translateY(0)}}@keyframes toastOut{to{opacity:0;transform:translate(-50%) translateY(14px)}}@keyframes backdropIn{0%{opacity:0}to{opacity:1}}@keyframes modalIn{0%{opacity:0;transform:translateY(8px) scale(.985)}to{opacity:1;transform:translateY(0) scale(1)}}@keyframes pulseGlow{0%,to{opacity:.7}50%{opacity:1}}.no-motion *,.no-motion *:before,.no-motion *:after{animation-duration:.001ms!important;transition-duration:.001ms!important}.tweaks-panel{font-family:var(--font-reading-sans)!important}@media (max-width: 640px){.app-chrome{padding:10px 14px;gap:8px}.brand-tag{display:none}.reader-stage{padding:32px 18px 80px}.reader-article{font-size:var(--reader-fs-mobile, 16.5px)}.reader-article h1{font-size:1.7em}.reader-article h2{font-size:1.4em}.reader-article h3{font-size:1.18em}.upload-panel{padding:36px 16px 80px;gap:22px;min-height:calc(100vh - 56px)}.hero h1{font-size:28px}.dropzone{padding:28px 20px}.tool-btn[data-label]:after{display:none}}:focus{outline:none}:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:2px}@media (max-width: 640px){.tool-btn{width:38px;height:38px}.chrome-actions{gap:4px}}.reader-article .mermaid-rendered{background:var(--bg-secondary);border:1px solid var(--border-subtle);border-radius:var(--radius-md);padding:18px;margin:1.4em 0;overflow-x:auto;text-align:center}.reader-article .mermaid-rendered svg{max-width:100%;height:auto}.reader-article .katex{font-size:1.05em}.reader-article .katex-display{margin:1.2em 0;padding:6px 12px;overflow-x:auto;overflow-y:hidden}@media print{.mermaid-block:not(.mermaid-rendered){display:none!important}}@media (max-width: 380px){.hero p br,.hero h1 br{display:none}}.reader-article a{word-break:break-word}.reader-article>h1:first-child{margin-top:0}.brand-tag.is-back{text-transform:none;letter-spacing:0;font-family:var(--font-reading-sans);color:var(--fg2)}