:root{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;color:#1b2621;background:#f4f5ef;font-synthesis:none;text-rendering:optimizeLegibility;--ink: #1b2621;--muted: #66746d;--faint: #7f8b85;--line: #dce2dc;--paper: #f4f5ef;--panel: #fff;--green: #176b4d;--green-deep: #15553f;--green-soft: #dfeee5;--yellow: #e9c747;--yellow-soft: #fff2b9;--rose-soft: #f6e4df;--shadow: 0 18px 60px rgba(31, 47, 39, .08);--serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;--mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;--bar-height: 0px;--nav-height: 60px}*{box-sizing:border-box}html,body,#root{margin:0;width:100%;min-height:100%}body{background:var(--paper);color:var(--ink)}button,input,textarea,select{font:inherit;color:inherit}button{border:0;cursor:pointer}a{color:var(--green)}button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible,a:focus-visible,article:focus-visible{outline:2px solid rgba(23,107,77,.42);outline-offset:2px}code{font-family:var(--mono);-webkit-user-select:text;user-select:text}small{font-size:12px}svg{stroke-width:1.8}.desktop-app{min-height:100%;background:radial-gradient(circle at 78% 0,rgba(233,199,71,.14),transparent 30rem),var(--paper)}.desktop-app.is-desktop{--bar-height: 42px;-webkit-user-select:none;user-select:none}.window-bar{height:var(--bar-height);display:flex;border-bottom:1px solid rgba(206,215,208,.8);background:#f4f5efeb}.window-drag-region{-webkit-app-region:drag;flex:1;position:relative;display:flex;align-items:center;padding:0 20px 0 80px;gap:11px}.window-brand{display:flex;align-items:center;gap:8px;font-size:12px;font-weight:700;letter-spacing:-.01em}.window-context{color:var(--faint);font-size:12px}.cube-glyph{width:17px;height:17px;display:grid;grid-template-columns:repeat(3,1fr);gap:1px;padding:2px;border-radius:4px;background:var(--ink);transform:rotate(-4deg)}.cube-glyph i{border-radius:1px;background:var(--yellow)}.cube-glyph i:nth-child(2){background:#5ca67f}.cube-glyph i:nth-child(3){background:#e17b5d}.window-controls{height:100%;display:flex;-webkit-app-region:no-drag}.window-controls button{width:46px;display:grid;place-items:center;background:transparent;color:#68746e}.window-controls button:hover{background:#e5e8e1}.window-controls button.close:hover{background:#d94a4a;color:#fff}.app-frame{display:grid;grid-template-columns:88px minmax(0,1fr)}.sidebar{border-right:1px solid var(--line);background:#f9faf6db;-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);padding:22px 12px 18px;display:flex;flex-direction:column;align-items:center}.brand-mark{width:46px;height:46px;flex:0 0 auto;border-radius:15px;display:grid;place-items:center;background:var(--ink);color:#fff;font-size:14px;font-weight:750;letter-spacing:-.05em;box-shadow:inset 0 0 0 1px #ffffff1f,0 8px 20px #18261f24}.brand-mark span{transform:rotate(-2deg)}.main-nav{width:100%;margin-top:42px;display:grid;gap:9px}.main-nav button{width:100%;padding:10px 2px 9px;display:grid;justify-items:center;gap:5px;border-radius:13px;background:transparent;color:var(--muted);font-size:12px;font-weight:600}.main-nav button svg{width:20px;height:20px}.main-nav button:hover{color:var(--ink);background:#ffffffb3}.main-nav button.active{color:var(--green);background:var(--green-soft)}.sidebar-bottom{margin-top:auto;display:grid;gap:8px;justify-items:center}.icon-button{width:38px;height:38px;border-radius:11px;display:grid;place-items:center;background:transparent;color:var(--muted)}.icon-button:hover{background:#e7eae4;color:var(--ink)}.icon-button svg{width:19px}.workspace{min-width:0;padding:0 30px 32px;scrollbar-width:thin;scrollbar-color:#c6cec8 transparent}.topbar{min-height:94px;max-width:1480px;margin:0 auto;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:26px}.eyebrow{margin:0 0 5px;color:var(--faint);font-size:12px;line-height:1.2;font-weight:700;letter-spacing:.1em}.topbar h1{margin:0;font-family:var(--serif);font-size:24px;font-weight:600;letter-spacing:-.035em}.progress-summary{margin-left:auto;width:218px;display:grid;grid-template-columns:1fr auto;align-items:center;gap:7px 12px;color:var(--muted);font-size:12px}.progress-summary b{color:var(--ink)}.progress-track{grid-column:1 / -1;height:5px;overflow:hidden;border-radius:10px;background:#dfe5df}.progress-track i{display:block;height:100%;min-width:3px;border-radius:inherit;background:var(--green);transition:width .3s ease}.study-layout{max-width:1480px;margin:0 auto;padding-top:22px;display:grid;gap:22px}.insight-panel{min-width:0;padding-top:5px}.insight-heading h2,.section-heading h2{margin:0;font-size:16px;letter-spacing:-.025em}.section-heading>span{padding:5px 9px;border-radius:20px;background:#e6eae5;color:var(--muted);font-size:12px;font-weight:650}.case-image-wrap.compact{width:42px;height:42px;border-radius:10px;background:#eef0eb}.case-image-wrap.compact:after{display:none}.case-image-wrap.compact img{width:38px;height:38px}.lesson-card{min-height:calc(100vh - var(--bar-height) - 132px);border:1px solid var(--line);border-radius:22px;background:var(--panel);padding:21px 25px 18px;box-shadow:var(--shadow);display:flex;flex-direction:column}.lesson-topline{display:flex;align-items:center;justify-content:space-between;gap:12px}.case-id{display:flex;align-items:center;gap:8px;font-size:13px;font-weight:700}.case-id button,.card-top button{width:32px;height:32px;border-radius:8px;display:grid;place-items:center;background:transparent;color:#8f9993}.case-id button:hover,.card-top button:hover{background:#f0f2ed;color:var(--ink)}.case-id button.bookmarked,.card-top button.bookmarked{color:#b79112}.case-id button.bookmarked svg,.card-top button.bookmarked svg{fill:var(--yellow)}.case-id svg,.card-top svg{width:16px}.case-image-wrap{position:relative;width:min(18vw,206px);aspect-ratio:1;margin:auto;display:grid;place-items:center;overflow:hidden;border-radius:20px;background:linear-gradient(145deg,#f5f5ef,#e9ece7);box-shadow:inset 0 0 0 1px #e0e4df}.case-image-wrap:after{content:"";position:absolute;inset:auto 18% 9%;height:10%;border-radius:50%;background:#1f28231f;filter:blur(10px)}.case-image-wrap img{position:relative;z-index:1;width:82%;height:82%;object-fit:contain;-webkit-user-drag:none}.lesson-copy h2{max-width:390px;margin:0 0 10px;font-family:var(--serif);font-size:clamp(29px,2.8vw,45px);font-weight:500;line-height:.98;letter-spacing:-.045em}.lesson-copy>p:not(.eyebrow){max-width:400px;margin:0;color:var(--muted);font-size:14px;line-height:1.55}.chips{margin-top:17px;display:flex;flex-wrap:wrap;gap:6px}.chips span{padding:6px 9px;border:1px solid var(--line);border-radius:30px;color:var(--muted);font-size:12px}.chunk-panel{padding:13px 2px 3px}.chunk-heading{display:flex;justify-content:space-between;align-items:center;gap:12px;color:var(--muted);font-size:12px}.chunk-heading span{color:var(--ink);font-weight:650}.chunk-row{margin-top:8px;display:flex;flex-wrap:wrap;gap:6px}.chunk-row button{padding:6px 9px 6px 6px;display:flex;align-items:center;gap:7px;border:1px solid transparent;border-radius:9px;background:transparent}.chunk-row button:hover{background:#f2f4ef}.chunk-row button.active{border-color:#c9d6cd;background:#eef4ef}.chunk-row button span{width:22px;height:22px;display:grid;place-items:center;border-radius:50%;background:#e4e8e4;color:var(--muted);font-size:12px}.chunk-row button span svg{width:12px}.chunk-row button.active span{background:var(--green);color:#fff}.chunk-row code{font-size:13px}.lesson-pagination{margin-top:auto;padding-top:13px;display:flex;align-items:center;justify-content:space-between;color:var(--faint);font-size:12px}.lesson-pagination button{padding:6px;display:flex;align-items:center;gap:5px;background:transparent;color:var(--muted);font-size:13px}.lesson-pagination button:hover{color:var(--ink)}.lesson-pagination svg{width:14px}.insight-heading{margin-bottom:14px}.memory-card,.confusion-card{width:100%;margin-top:10px;padding:15px;border:1px solid var(--line);border-radius:15px;background:#ffffffb8;text-align:left}.memory-card.accent{border-color:#ead985;background:var(--yellow-soft)}.memory-card>span{display:block;color:var(--muted);font-size:12px;font-weight:700;letter-spacing:.06em;text-transform:uppercase}.memory-card b{display:block;margin-top:10px;font-family:var(--serif);font-size:19px;font-weight:600;line-height:1.1}.memory-card p{margin:7px 0 0;color:var(--muted);font-size:13px;line-height:1.45}.note-card textarea{width:100%;min-height:72px;margin-top:10px;padding:0;resize:vertical;border:0;outline:0;background:transparent;color:var(--ink);font-size:14px;line-height:1.45;-webkit-user-select:text;user-select:text}.note-card textarea::placeholder{color:#8e9893}.note-card small{color:var(--faint)}.confusion-card{display:block;transition:transform .18s,box-shadow .18s}.confusion-card:hover{transform:translateY(-2px);box-shadow:0 8px 24px #1f2d2614}.confusion-card>span{display:flex;align-items:center;gap:5px;color:#8a6812;font-size:12px;font-weight:700;letter-spacing:.06em;text-transform:uppercase}.confusion-card>span svg{width:13px}.confusion-card b{display:block;margin-top:9px;font-size:14px}.confusion-card small{margin-top:5px;display:flex;align-items:center;color:var(--muted)}.confusion-card small svg{width:12px}.workbench-layout{align-items:start}.detail-back-row{max-width:1480px;margin:14px auto -4px;display:flex;align-items:center;justify-content:space-between;gap:12px;color:var(--muted);font-size:12px}.detail-back-row button{padding:7px 9px;display:flex;align-items:center;gap:5px;border-radius:8px;background:transparent;color:var(--green);font-size:13px;font-weight:650}.detail-back-row button:hover{background:var(--green-soft)}.detail-back-row svg{width:14px}.detail-layout{grid-template-columns:minmax(0,1fr) 260px;padding-top:16px}.workbench-card{padding-bottom:14px}.lesson-top-actions{display:flex;align-items:center;flex-wrap:wrap;justify-content:flex-end;gap:9px}.view-switch{padding:3px;display:flex;gap:2px;border:1px solid var(--line);border-radius:9px;background:#f0f3ee}.view-switch button{height:30px;padding:0 10px;display:flex;align-items:center;gap:5px;border-radius:6px;background:transparent;color:var(--muted);font-size:12px;font-weight:650}.view-switch button.active{background:#fff;color:var(--green);box-shadow:0 2px 8px #1f2d2614}.view-switch svg{width:14px}.simulation-main{min-height:268px;padding:12px 0 15px;display:grid;grid-template-columns:minmax(270px,1.15fr) minmax(220px,.85fr);align-items:center;gap:25px;border-bottom:1px solid #e7eae6}.simulation-shell{position:relative;min-height:250px;display:grid;grid-template-rows:minmax(210px,1fr) auto;overflow:hidden;border:1px solid #e0e5df;border-radius:17px;background:radial-gradient(circle at 50% 42%,#fff,#eef1ec 74%)}.cube-simulation{width:100%;min-height:220px;display:grid;place-items:center;overflow:hidden}.cube-simulation twisty-player{width:100%;height:240px;display:block}.cube-simulation.two-d twisty-player{height:230px}.simulation-caption{padding:6px 10px 9px;color:var(--faint);font-size:12px;text-align:center}.compact-copy h2{font-size:clamp(27px,2.5vw,40px)}.algorithm-workbench{margin-top:15px;padding:15px;border:1px solid var(--line);border-radius:16px;background:#f8f9f6}.variant-strip{display:flex;align-items:center;justify-content:space-between;gap:9px}.variant-tabs{min-width:0;flex:1;display:flex;gap:5px;overflow-x:auto;scrollbar-width:none}.variant-tabs::-webkit-scrollbar{display:none}.variant-tabs button,.add-alg-button{height:34px;padding:0 10px;display:flex;align-items:center;gap:5px;border:1px solid #dce1dc;border-radius:8px;background:#fff;color:var(--muted);font-size:12px;font-weight:650;white-space:nowrap}.variant-tabs button:hover,.add-alg-button:hover{border-color:#b9c6bd;color:var(--ink)}.variant-tabs button.active,.add-alg-button.active{border-color:#8fb4a1;background:var(--green-soft);color:var(--green);box-shadow:inset 0 0 0 1px #176b4d14}.variant-tabs svg,.add-alg-button svg{width:13px}.preferred-star{width:11px!important;fill:var(--yellow);color:#aa8510}.add-alg-button{flex:0 0 auto;background:transparent}.editor-heading{margin:14px 0 8px;display:flex;align-items:center;justify-content:space-between;gap:12px}.editor-heading b{font-size:14px}.editor-heading b a{display:inline-flex;align-items:center;gap:3px}.editor-heading b a svg{width:13px}.editor-heading input{width:260px;max-width:100%;padding:3px 0;border:0;border-bottom:1px solid #ccd5ce;outline:0;background:transparent;font-size:14px;font-weight:650;-webkit-user-select:text;user-select:text}.editor-heading input:focus{border-color:var(--green)}.editor-badges{display:flex;flex-wrap:wrap;gap:5px}.preferred-badge,.verified-badge,.unsaved-badge{padding:5px 8px;display:flex;align-items:center;gap:4px;border-radius:20px;font-size:12px;font-weight:650;white-space:nowrap}.preferred-badge{background:var(--yellow-soft);color:#7d610f}.verified-badge{background:var(--green-soft);color:var(--green)}.unsaved-badge{background:var(--line);color:var(--muted)}.preferred-badge svg,.verified-badge svg{width:12px}.preferred-badge svg{fill:var(--yellow)}.official-algorithm{min-height:55px;padding:12px 13px;display:flex;align-items:center;justify-content:space-between;gap:12px;border:1px solid #d9dfda;border-radius:10px;background:#fff}.official-algorithm code{font-size:clamp(13px,1.1vw,16px);line-height:1.5}.official-algorithm button{width:34px;height:34px;flex:0 0 auto;display:grid;place-items:center;border-radius:8px;background:#f1f3ef;color:var(--muted)}.official-algorithm button:hover{color:var(--ink)}.official-algorithm svg{width:14px}.algorithm-editor{width:100%;min-height:72px;padding:12px 13px;resize:vertical;border:1px solid #ccd5ce;border-radius:10px;outline:0;background:#fff;font-family:var(--mono);font-size:14px;line-height:1.55;-webkit-user-select:text;user-select:text}.algorithm-editor:focus{border-color:#176b4d8c;box-shadow:0 0 0 3px #176b4d14}.workbench-chunks{padding-bottom:8px}.verification-result{margin-top:8px;padding:10px 12px;display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:10px;border:1px solid;border-radius:10px}.verification-result.correct{border-color:#a9cbb8;background:#edf7f0;color:var(--green)}.verification-result.incorrect{border-color:#dfb5a8;background:#fbefeb;color:#94503e}.verification-result>svg{width:18px}.verification-result b{display:block;font-size:13px}.verification-result span{display:block;margin-top:2px;color:#5f6c65;font-size:12px;line-height:1.45}.verification-result small{white-space:nowrap}.editor-actions{margin-top:10px;display:flex;align-items:center;flex-wrap:wrap;gap:6px}.editor-actions button{height:36px;padding:0 12px;display:flex;align-items:center;gap:6px;border:1px solid #d5dcd6;border-radius:8px;background:#fff;color:var(--muted);font-size:12px;font-weight:650}.editor-actions button:hover:not(:disabled){border-color:#b8c5bb;color:var(--ink);transform:translateY(-1px)}.editor-actions button:disabled{opacity:.5;cursor:default}.editor-actions svg{width:14px}.editor-actions .verify-button{margin-left:auto;border-color:var(--green);background:var(--green);color:#fff}.editor-actions .verify-button:hover:not(:disabled){color:#fff;background:var(--green-deep)}.editor-actions .preferred-button{color:#7d610f}.editor-actions .delete-button{width:36px;padding:0;justify-content:center;color:#a15e4b}.tools-panel{position:sticky;top:116px}.rules-card{margin-top:10px;padding:14px;border:1px solid #c9dbd0;border-radius:14px;background:#edf5f0}.rules-card>span{display:flex;align-items:center;gap:6px;color:var(--green);font-size:12px;font-weight:700;letter-spacing:.06em;text-transform:uppercase}.rules-card svg{width:14px}.rules-card ul{margin:10px 0 0;padding-left:17px;color:#4f6158;font-size:13px;line-height:1.65}.status-picker{padding:3px;display:flex;gap:2px;border:1px solid var(--line);border-radius:9px;background:#f0f2ee}.status-picker button{min-width:74px;height:30px;padding:0 9px;border-radius:6px;background:transparent;color:var(--muted);font-size:12px;font-weight:650}.status-picker button:hover{background:#ffffffb8;color:var(--ink)}.status-picker button.active{background:#fff;box-shadow:0 2px 8px #1f2d2614}.status-picker button.unlearned.active{color:#5f6b65}.status-picker button.learning.active{background:var(--yellow-soft);color:#75590d}.status-picker button.learned.active{background:var(--green-soft);color:var(--green)}.status-picker.compact{width:100%;margin-top:11px;padding:2px}.status-picker.compact button{min-width:0;height:28px;flex:1;padding:0 3px}.library-page,.progress-page{max-width:1340px;margin:0 auto;padding:28px 0 40px}.library-intro{display:flex;align-items:flex-end;justify-content:space-between;gap:28px}.library-intro h2{margin:0 0 5px;font-family:var(--serif);font-size:34px;font-weight:600;letter-spacing:-.04em}.library-intro p{margin:0;color:var(--muted);font-size:14px}.library-stat{text-align:right}.library-stat span{display:block;color:var(--muted);font-size:12px;text-transform:uppercase;letter-spacing:.08em}.library-stat b{font-family:var(--serif);font-size:28px}.filter-bar{position:sticky;top:-1px;z-index:4;margin:23px 0 18px;padding:10px;display:flex;gap:8px;align-items:center;border:1px solid var(--line);border-radius:14px;background:#f9faf6f0;-webkit-backdrop-filter:blur(15px);backdrop-filter:blur(15px)}.search-box{height:40px;min-width:260px;flex:1;display:flex;align-items:center;gap:8px;padding:0 11px;border:1px solid #d8ded9;border-radius:10px;background:#fff}.search-box svg{width:15px;flex:0 0 auto;color:var(--muted)}.search-box input{width:100%;min-width:0;border:0;outline:0;background:transparent;font-size:13px;-webkit-user-select:text;user-select:text}.filter-bar select{height:40px;min-width:160px;padding:0 30px 0 11px;border:1px solid #d8ded9;border-radius:10px;background:#fff;font-size:13px}.result-count{min-width:70px;color:var(--muted);font-size:12px;text-align:center}.case-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:13px}.case-card{min-width:0;border:1px solid var(--line);border-radius:18px;background:#ffffffd1;overflow:hidden;cursor:pointer;transition:transform .18s,border-color .18s,box-shadow .18s}.case-card:hover{transform:translateY(-3px);border-color:#c8d1ca;box-shadow:0 14px 35px #1f2d2617}.case-card.status-learning{border-color:#dccb82}.case-card.status-learned{border-color:#a9c7b7}.card-top{height:44px;padding:0 11px 0 14px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid #e7eae6;font-size:12px;font-weight:700}.case-card .case-image-wrap{width:120px;height:120px;margin:18px auto 10px;border-radius:17px}.card-copy{min-width:0;padding:5px 15px 14px}.card-copy small{color:var(--muted);text-transform:uppercase;letter-spacing:.06em}.card-copy h3{margin:5px 0 9px;overflow:hidden;font-family:var(--serif);font-size:17px;font-weight:600;text-overflow:ellipsis;white-space:nowrap}.card-copy code{display:-webkit-box;min-height:36px;overflow:hidden;color:#56635c;font-size:12px;line-height:1.5;-webkit-box-orient:vertical;-webkit-line-clamp:2;line-clamp:2}.card-footer{height:44px;padding:0 8px 0 14px;display:flex;align-items:center;justify-content:space-between;gap:8px;border-top:1px solid #e7eae6;color:var(--muted);font-size:12px}.card-footer .open-case{padding:6px 6px 6px 8px;display:flex;align-items:center;gap:2px;border-radius:7px;background:transparent;color:var(--green);font-size:12px;font-weight:650}.card-footer .open-case:hover{background:var(--green-soft)}.card-footer svg{width:13px}.empty-state{padding:80px 20px;display:grid;justify-items:center;text-align:center;color:var(--muted)}.empty-state svg{width:30px}.empty-state h3{margin:13px 0 4px;color:var(--ink)}.empty-state p{margin:0;font-size:14px}.progress-hero{min-height:190px;padding:26px 34px;display:flex;align-items:center;justify-content:space-between;gap:20px;border-radius:22px;overflow:hidden;background:radial-gradient(circle at 85% 40%,rgba(233,199,71,.26),transparent 18rem),#1d2a24;color:#fff}.progress-hero .eyebrow{color:#b3beb8}.progress-hero strong{display:block;margin:4px 0 -3px;font-family:var(--serif);font-size:72px;font-weight:500;letter-spacing:-.06em}.progress-hero p:last-child{color:#b3beb8;font-size:13px}.mastery-orbit{width:126px;height:126px;flex:0 0 auto;padding:8px;display:grid;place-items:center;border-radius:50%;background:conic-gradient(var(--yellow) var(--score),rgba(255,255,255,.1) 0)}.mastery-orbit:before{content:"";grid-area:1/1;width:104px;height:104px;border-radius:50%;background:#1d2a24}.mastery-orbit span{grid-area:1/1;z-index:1;display:grid;justify-items:center;font-family:var(--serif);font-size:25px}.mastery-orbit small{color:#b3beb8;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}.stat-grid{margin-top:14px;display:grid;gap:14px}.stat-grid>div{min-height:92px;padding:16px 18px;display:grid;grid-template-columns:auto 1fr;align-items:center;gap:11px;border:1px solid var(--line);border-radius:15px;background:#ffffffc2}.stat-grid svg{width:20px;color:var(--green)}.stat-grid span{color:var(--muted);font-size:13px}.stat-grid b{grid-column:2;font-family:var(--serif);font-size:28px}.stat-grid small{color:var(--faint)}.four-stats{grid-template-columns:repeat(4,1fr)}.progress-columns{margin-top:14px;display:grid;grid-template-columns:minmax(0,1.45fr) minmax(300px,.55fr);gap:14px}.group-progress,.review-list{min-width:0;padding:21px;border:1px solid var(--line);border-radius:18px;background:#ffffffc7}.section-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:12px;margin-bottom:18px}.group-bars{display:grid;gap:13px}.group-bar{display:grid;grid-template-columns:160px 1fr 44px;align-items:center;gap:13px}.group-bar>div:first-child{min-width:0}.group-bar b{display:block;overflow:hidden;font-size:13px;text-overflow:ellipsis;white-space:nowrap}.group-bar span{display:block;margin-top:2px;color:var(--muted);font-size:12px}.bar-track{height:6px;border-radius:10px;background:#e3e7e3;overflow:hidden}.bar-track i{display:block;min-width:2px;height:100%;border-radius:inherit;background:var(--green)}.group-bar strong{font-size:13px;text-align:right}.review-list>button{width:100%;padding:8px 3px;display:grid;grid-template-columns:42px 1fr auto;align-items:center;gap:10px;border-bottom:1px solid #e8ebe7;background:transparent;text-align:left}.review-list>button:last-child{border-bottom:0}.review-list>button:hover{background:#f5f7f2}.review-list>button>span b{display:block;font-size:13px}.review-list>button>span small{display:block;margin-top:2px;color:var(--muted)}.review-list>button>svg{width:14px;color:var(--muted)}.mini-empty{padding:25px 8px;display:grid;justify-items:center;color:var(--muted);font-size:13px;line-height:1.5;text-align:center}.mini-empty svg{width:22px;color:var(--green)}.progress-footnote{margin-top:14px;color:var(--muted);font-size:12px;text-align:right}.modal-backdrop{position:fixed;inset:var(--bar-height) 0 0;z-index:20;display:grid;place-items:center;padding:30px;background:#141d196e;-webkit-backdrop-filter:blur(7px);backdrop-filter:blur(7px);animation:fade-in .16s ease-out}.compare-modal,.settings-modal{width:min(760px,92vw);max-height:88vh;padding:24px;overflow:auto;border:1px solid rgba(255,255,255,.6);border-radius:22px;background:#fafbf7;box-shadow:0 30px 90px #101c1540;animation:modal-in .2s ease-out}.settings-modal{width:min(500px,92vw)}.modal-heading{display:flex;align-items:center;justify-content:space-between;gap:12px}.modal-heading h2{margin:0;font-family:var(--serif);font-size:26px}.modal-heading>button{width:36px;height:36px;flex:0 0 auto;display:grid;place-items:center;border-radius:10px;background:#ebeee9;color:var(--muted)}.modal-heading>button:hover{color:var(--ink)}.modal-heading svg{width:16px}.compare-grid{margin-top:20px;display:grid;grid-template-columns:1fr 1fr;gap:12px}.compare-case{min-width:0;padding:17px;border:1px solid var(--line);border-radius:17px;background:#fff}.compare-case .case-image-wrap{width:150px}.compare-case>span{display:block;margin-top:14px;color:var(--green);font-size:12px;font-weight:700}.compare-case h3{margin:5px 0;font-family:var(--serif);font-size:21px}.compare-case p{min-height:45px;margin:0 0 12px;color:var(--muted);font-size:13px;line-height:1.5}.compare-case code{display:block;padding:10px;border-radius:9px;background:#f2f4ef;font-size:12px;line-height:1.5}.compare-tip{margin-top:12px;padding:12px 14px;display:flex;align-items:flex-start;gap:9px;border-radius:12px;background:var(--yellow-soft);color:#624f12;font-size:13px;line-height:1.5}.compare-tip svg{width:16px;flex:0 0 auto}.setting-row{padding:18px 2px;display:flex;justify-content:space-between;gap:20px;border-bottom:1px solid var(--line)}.setting-row b{display:block;font-size:14px}.setting-row span{display:block;margin-top:4px;color:var(--muted);font-size:13px;line-height:1.5}.setting-row .offline-badge{height:28px;margin:0;padding:0 9px;display:flex;align-items:center;gap:5px;border-radius:20px;background:var(--green-soft);color:var(--green);font-size:12px;font-weight:650;white-space:nowrap}.offline-badge svg{width:12px}.reset-button{margin-top:20px;padding:10px 14px;border-radius:9px;background:var(--rose-soft);color:#87503f;font-size:13px;font-weight:650}.toast{position:fixed;z-index:30;bottom:24px;left:50%;max-width:calc(100vw - 32px);transform:translate(-50%);padding:10px 14px;display:flex;align-items:center;gap:8px;border-radius:10px;background:#1e2b25;color:#fff;box-shadow:0 12px 30px #131f1833;font-size:13px;animation:toast-in .2s ease-out}.toast svg{width:14px;flex:0 0 auto;color:#73c297}@keyframes fade-in{0%{opacity:0}}@keyframes modal-in{0%{opacity:0;transform:translateY(8px) scale(.985)}}@keyframes toast-in{0%{opacity:0;transform:translate(-50%,7px)}}@media(min-width:1040px){html,body,#root{height:100%;overflow:hidden}.desktop-app{height:100%}.app-frame{height:calc(100% - var(--bar-height))}.workspace{height:100%;overflow:auto}}@media(max-width:1240px){.detail-layout{grid-template-columns:minmax(0,1fr)}.tools-panel{position:static;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;align-items:start}.tools-panel>*{margin-top:0}.insight-heading{grid-column:1 / -1;margin-bottom:0}.case-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.simulation-main{grid-template-columns:minmax(250px,1.1fr) minmax(200px,.9fr)}}@media(max-width:1039.98px){.app-frame{display:block}.sidebar{position:sticky;top:0;z-index:15;height:var(--nav-height);padding:0 16px;flex-direction:row;gap:10px;border-right:0;border-bottom:1px solid var(--line);background:#f9faf6f2}.brand-mark{width:38px;height:38px;border-radius:12px;font-size:13px}.main-nav{width:auto;margin:0;display:flex;gap:4px}.main-nav button{width:auto;padding:8px 10px;display:flex;align-items:center;gap:6px;border-radius:10px;font-size:13px}.main-nav button svg{width:18px;height:18px}.sidebar-bottom{margin:0 0 0 auto;display:flex;gap:2px}.workspace{padding:0 16px 32px}.topbar{min-height:0;padding:18px 0 14px;flex-wrap:wrap;gap:12px 20px}.lesson-card{min-height:0;padding:18px 18px 14px}.simulation-main{grid-template-columns:minmax(0,1fr);gap:16px}.compact-copy{padding:0 4px}.case-grid{grid-template-columns:repeat(auto-fill,minmax(min(100%,230px),1fr))}.progress-columns{grid-template-columns:minmax(0,1fr)}.four-stats{grid-template-columns:repeat(2,minmax(0,1fr))}.filter-bar{position:static;flex-wrap:wrap}.search-box{min-width:0;flex:1 1 100%}.filter-bar select{min-width:0;flex:1 1 160px}.search-box input,.filter-bar select,.algorithm-editor,.editor-heading input,.note-card textarea{font-size:16px}.case-image-wrap{width:min(40vw,206px)}}@media(max-width:720px){.keyboard-hint{display:none}.library-intro{flex-direction:column;align-items:flex-start;gap:12px}.library-intro h2{font-size:30px}.library-stat{text-align:left}.progress-summary{width:100%;margin-left:0}.lesson-topline{flex-wrap:wrap}.lesson-top-actions{width:100%;justify-content:space-between}.variant-strip{flex-wrap:wrap}.variant-tabs{flex:1 1 100%}.editor-heading{flex-wrap:wrap}.editor-actions .verify-button{margin-left:0}.tools-panel{grid-template-columns:minmax(0,1fr)}.progress-hero{padding:22px;flex-direction:column;align-items:flex-start}.progress-hero strong{font-size:56px}.group-bar{grid-template-columns:minmax(0,120px) minmax(0,1fr) 44px;gap:10px}.modal-backdrop{padding:16px}.compare-modal,.settings-modal{width:100%;max-height:calc(100vh - 32px);padding:18px}.compare-grid{grid-template-columns:minmax(0,1fr)}.setting-row{flex-wrap:wrap;gap:10px}}@media(max-width:560px){.case-grid{grid-template-columns:minmax(0,1fr);gap:10px}.case-card{display:grid;grid-template-columns:104px minmax(0,1fr);grid-template-areas:"top top" "image copy" "footer footer"}.card-top{grid-area:top}.case-card .case-image-wrap{grid-area:image;width:88px;height:88px;margin:14px 0 0 14px;border-radius:14px}.card-copy{grid-area:copy;padding:12px 14px 12px 6px}.card-footer{grid-area:footer}.status-picker{width:100%}.status-picker button{min-width:0;flex:1}.lesson-card{padding:14px 12px 12px;border-radius:18px}.algorithm-workbench{padding:12px}.editor-actions button{flex:1 1 auto;justify-content:center}.editor-actions .delete-button{flex:0 0 36px}.four-stats>div{min-height:76px;padding:12px 14px}.stat-grid b{font-size:24px}}@media(max-width:400px){.brand-mark{display:none}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;animation-duration:.01ms!important;transition-duration:.01ms!important}}
