@import url('https://fonts.googleapis.com/css2?family=DM+Mono:wght@400;500&family=DM+Sans:wght@400;500;600;700&family=Manrope:wght@400;500;600;700;800&display=swap');
:root{--ink:#20212b;--muted:#777986;--line:#e9e9ef;--paper:#fff;--canvas:#f6f6f9;--purple:#5145df;--purple-soft:#f0efff;--green:#237b61;--green-soft:#e9f7f1;--orange:#a65a21;--orange-soft:#fff2e7;--blue:#3068a8;--blue-soft:#edf4ff;--shadow:0 10px 30px #2723420a}
*{box-sizing:border-box}body{margin:0;background:var(--canvas);color:var(--ink);font-family:'DM Sans',sans-serif;font-size:14px;-webkit-font-smoothing:antialiased}button,input,select,textarea{font:inherit}button{cursor:pointer;color:inherit}.app-shell{min-height:100vh;display:flex}.sidebar{width:246px;position:fixed;inset:0 auto 0 0;background:#fff;border-right:1px solid var(--line);padding:25px 17px 18px;display:flex;flex-direction:column;z-index:3}.brand{display:flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none;font-family:Manrope,sans-serif;font-size:16px;font-weight:800;letter-spacing:-.7px;padding:0 8px}.brand-light{font-weight:500;color:#696b78}.brand-mark{height:32px;width:32px;border-radius:10px;background:var(--purple);color:white;display:grid;place-items:center;font:500 12px 'DM Mono',monospace;letter-spacing:-2px}.side-label{margin:44px 9px 13px;color:#9899a4;font:500 10px 'DM Mono',monospace;letter-spacing:1.1px}.nav-list{display:grid;gap:4px}.nav-item{height:41px;border:0;background:transparent;text-align:left;padding:0 11px;border-radius:9px;color:#656773;display:flex;align-items:center;gap:11px;font-size:13px;font-weight:500;transition:.15s}.nav-item:hover{background:#f8f8fb;color:var(--ink)}.nav-item.active{background:var(--purple-soft);color:var(--purple);font-weight:700}.nav-icon{width:17px;text-align:center;font-size:16px;color:#858693}.active .nav-icon{color:var(--purple)}.nav-count{margin-left:auto;color:var(--purple);font:500 11px 'DM Mono',monospace}.nav-dot{height:6px;width:6px;border-radius:50%;background:#ea8055;margin-left:auto}.side-divider{height:1px;background:var(--line);margin:22px 4px 14px}.profile-card{border:0;background:transparent;padding:8px 5px;display:flex;align-items:center;gap:10px;text-align:left;border-radius:9px}.profile-card:hover{background:#f8f8fb}.avatar{height:30px;width:30px;border-radius:50%;background:#f8ddc3;color:#794823;display:grid;place-items:center;font-weight:700}.profile-copy{display:grid;gap:3px;flex:1}.profile-copy strong{font-size:12px}.profile-copy small{font-size:11px;color:var(--muted)}.chevron{color:#8c8e99}.sidebar-foot{margin-top:auto;padding:14px 6px 2px;color:#8b8c96;font-size:10px;display:flex;align-items:center;gap:7px}.status-dot{width:6px;height:6px;border-radius:50%;background:#43a987}.main-area{margin-left:246px;width:calc(100% - 246px);min-height:100vh}.topbar{height:64px;background:#ffffffd9;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 42px;position:sticky;top:0;z-index:2;backdrop-filter:blur(12px)}.breadcrumb{display:flex;gap:10px;align-items:center;color:#92939c;font-size:12px}.breadcrumb strong{font-weight:600;color:#41424c}.crumb-sep{color:#c7c7cf}.top-actions{display:flex;align-items:center;gap:14px}.today-date{color:#7e808a;font:11px 'DM Mono',monospace}.icon-button{height:32px;width:32px;border-radius:9px;border:1px solid var(--line);background:white;color:#666978;font-size:16px}.avatar-small{border:0;height:29px;width:29px;font-size:12px}.content{max-width:1160px;padding:36px 42px 64px;margin:0 auto}.mobile-menu{display:none}.eyebrow{font:500 10px 'DM Mono',monospace;letter-spacing:1.4px;text-transform:uppercase;color:#868792}.page-heading{display:flex;justify-content:space-between;align-items:flex-end;gap:24px;margin-bottom:27px}.page-heading h1{font:700 28px Manrope,sans-serif;letter-spacing:-1.1px;margin:8px 0 6px}.page-heading p{color:#777985;margin:0;font-size:13px}.day-pill{border:1px solid var(--line);background:#fff;border-radius:8px;padding:8px 11px;color:#777985;font-size:11px;white-space:nowrap}.welcome-row{display:flex;justify-content:space-between;align-items:center;margin:4px 0 22px}.welcome-row h1{margin:0 0 7px;font:700 26px Manrope,sans-serif;letter-spacing:-1px}.welcome-row p{margin:0;color:#777985;font-size:13px}.streak{border:1px solid #f2e6d9;background:#fffaf4;border-radius:10px;padding:10px 13px;color:#a3682d;font-size:11px;display:flex;align-items:center;gap:8px}.streak strong{font:500 12px 'DM Mono',monospace}.hero-card{background:#262437;border-radius:15px;padding:25px 27px;color:white;position:relative;overflow:hidden;display:grid;grid-template-columns:1fr auto;gap:20px;box-shadow:var(--shadow)}.hero-card:after{content:"";position:absolute;right:-48px;top:-85px;width:280px;height:280px;border:1px solid #ffffff16;border-radius:50%;box-shadow:0 0 0 25px #ffffff07,0 0 0 53px #ffffff05;pointer-events:none}.hero-content{position:relative;z-index:1}.hero-overline{display:flex;align-items:center;gap:8px;color:#c8c5ea;font:10px 'DM Mono',monospace;letter-spacing:.8px;text-transform:uppercase}.live-dot{width:6px;height:6px;background:#a69cff;border-radius:50%;box-shadow:0 0 0 4px #a69cff20}.hero-card h2{font:600 21px Manrope,sans-serif;letter-spacing:-.5px;margin:13px 0 7px}.hero-card p{color:#c0bfce;font-size:12px;margin:0;line-height:1.6;max-width:570px}.hero-meta{display:flex;gap:13px;margin-top:18px;color:#c2bfd1;font-size:10px}.hero-meta span{display:flex;align-items:center;gap:5px}.primary-button{height:39px;padding:0 15px;border:0;border-radius:8px;background:var(--purple);color:white;font-size:12px;font-weight:700;display:inline-flex;align-items:center;justify-content:center;gap:16px;transition:.15s}.primary-button:hover{background:#4237c7;transform:translateY(-1px)}.hero-card .primary-button{align-self:end;position:relative;z-index:1;background:#fff;color:#272538;white-space:nowrap}.hero-card .primary-button:hover{background:#eeedff}.dashboard-grid{display:grid;grid-template-columns:minmax(0,1.45fr) minmax(270px,.8fr);gap:17px;margin-top:18px}.panel{background:white;border:1px solid var(--line);border-radius:13px;box-shadow:var(--shadow)}.panel-pad{padding:19px}.panel-title-row{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:15px}.panel-title{font:700 13px Manrope,sans-serif;margin:0}.subtle-link{border:0;background:none;color:var(--purple);font-size:11px;font-weight:600;padding:4px}.task-list{display:grid;gap:9px}.task-row{display:flex;align-items:center;gap:11px;padding:11px 10px;border:1px solid #eeeef2;border-radius:9px;transition:.15s}.task-row:hover{border-color:#d9d6ff;background:#fcfbff}.task-icon{width:31px;height:31px;display:grid;place-items:center;border-radius:8px;font-size:13px;flex:none}.task-icon.purple{background:#f0efff;color:var(--purple)}.task-icon.orange{background:#fff3e8;color:#ba6a28}.task-icon.blue{background:#edf4ff;color:#3873b8}.task-copy{min-width:0;flex:1}.task-copy strong{display:block;font-size:11px;margin-bottom:4px}.task-copy small{color:#858692;font-size:10px}.task-time{font:10px 'DM Mono',monospace;color:#8a8b95;white-space:nowrap}.task-arrow{color:#a4a5af;font-size:15px}.skill-list{display:grid;gap:13px}.skill-row{display:grid;grid-template-columns:1fr auto;gap:7px;align-items:center}.skill-name{font-size:11px;color:#53545f}.skill-state{font:10px 'DM Mono',monospace;color:#868792}.skill-track{grid-column:1/3;height:5px;background:#f0f0f4;border-radius:4px;overflow:hidden}.skill-fill{height:100%;background:#7c72ea;border-radius:4px}.skill-fill.warm{background:#dfa16a}.tip-card{margin-top:17px;border-radius:12px;background:#f2f1ff;padding:15px 17px;display:flex;gap:12px;align-items:flex-start}.tip-spark{color:var(--purple);font-size:17px}.tip-card strong{font-size:11px;display:block;margin-bottom:4px}.tip-card p{margin:0;color:#696a7a;font-size:11px;line-height:1.5}.section-label{font:500 10px 'DM Mono',monospace;letter-spacing:.8px;text-transform:uppercase;color:#8b8c97;margin:23px 0 10px}.news-inline{display:grid;grid-template-columns:1fr 1fr;gap:12px}.news-mini{background:white;border:1px solid var(--line);border-radius:11px;padding:14px 15px}.news-mini .source-line{font:10px 'DM Mono',monospace;color:#888a95;display:flex;justify-content:space-between;gap:10px}.news-mini h3{font:600 12px Manrope,sans-serif;margin:10px 0 6px;line-height:1.5}.news-mini p{font-size:10px;line-height:1.5;color:#787a86;margin:0}.source-badge{border-radius:5px;background:#edf6f1;color:#3b8067;padding:3px 6px;font:9px 'DM Mono',monospace}.text-button{border:0;background:none;padding:8px 0 0;color:var(--purple);font-size:10px;font-weight:600}.panel-foot{border-top:1px solid #f0f0f3;margin-top:15px;padding-top:12px;color:#898a95;font-size:10px;display:flex;justify-content:space-between}.quiz-card,.feature-card{background:white;border:1px solid var(--line);border-radius:14px;padding:23px;box-shadow:var(--shadow)}.quiz-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px}.quiz-step{color:#747681;font:11px 'DM Mono',monospace}.progress{height:5px;background:#eeeef3;border-radius:4px;overflow:hidden;margin:0 0 25px}.progress>span{display:block;height:100%;background:var(--purple);transition:width .25s}.quiz-question{font:600 19px Manrope,sans-serif;letter-spacing:-.4px;line-height:1.45;margin:0 0 9px}.quiz-context{color:#777985;font-size:12px;line-height:1.6;margin:0 0 20px}.code-block{background:#222433;color:#f0eef9;border-radius:10px;padding:16px 18px;font:12px/1.7 'DM Mono',monospace;white-space:pre-wrap;overflow:auto}.code-purple{color:#c5acff}.code-green{color:#a4dfbe}.choice-list{display:grid;gap:9px}.choice{width:100%;border:1px solid #e7e7ed;border-radius:9px;background:#fff;padding:12px 14px;display:flex;align-items:flex-start;gap:11px;text-align:left;font-size:12px;line-height:1.5;transition:.12s}.choice:hover{border-color:#c7c3ff;background:#fcfbff}.choice.selected{border-color:var(--purple);background:var(--purple-soft)}.choice-letter{height:21px;width:21px;border:1px solid #dedee6;border-radius:6px;display:grid;place-items:center;flex:none;font:10px 'DM Mono',monospace;color:#777985}.choice.selected .choice-letter{background:var(--purple);border-color:var(--purple);color:white}.quiz-actions{display:flex;justify-content:space-between;align-items:center;margin-top:20px}.text-muted{color:#8c8d97;font-size:11px}.result-box{margin-top:17px;background:#eff8f4;border:1px solid #d5eee2;border-radius:9px;padding:13px 15px;color:#316c58;font-size:12px;line-height:1.6}.result-box.warning{background:#fff5ed;border-color:#f4dfcc;color:#855127}.result-box h4{margin:0 0 4px;font:700 12px Manrope,sans-serif}.secondary-button{height:36px;border:1px solid var(--line);border-radius:8px;background:#fff;padding:0 12px;font-size:11px;font-weight:600}.two-col{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(240px,.7fr);gap:17px}.error-meta{display:flex;gap:7px;margin:14px 0}.chip{padding:5px 8px;border-radius:6px;background:#f1f1f5;color:#626470;font-size:10px}.chip.red{background:#fff0ee;color:#ac4a3c}.error-steps{display:grid;gap:12px;counter-reset:steps}.error-step{display:grid;grid-template-columns:25px 1fr;gap:10px;align-items:start}.error-step .number{width:23px;height:23px;border-radius:50%;background:#f0efff;color:var(--purple);display:grid;place-items:center;font:11px 'DM Mono',monospace}.error-step strong{font-size:11px}.error-step p{margin:4px 0 0;color:#777985;font-size:11px;line-height:1.5}.answer-area{width:100%;min-height:83px;border:1px solid #e4e4eb;border-radius:9px;padding:11px 12px;resize:vertical;font-size:12px;line-height:1.6;outline:none}.answer-area:focus{border-color:#aaa4ff;box-shadow:0 0 0 3px #f0efff}.answer-tools{display:flex;gap:8px;align-items:center;margin-top:9px}.mic-button{border:1px solid var(--line);height:36px;padding:0 10px;border-radius:8px;background:white;color:#666773;font-size:11px}.concept-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.concept-card{background:white;border:1px solid var(--line);border-radius:12px;padding:16px;cursor:pointer;transition:.14s}.concept-card:hover{border-color:#c8c4ff;transform:translateY(-1px)}.concept-card .concept-type{font:10px 'DM Mono',monospace;color:var(--purple);text-transform:uppercase;letter-spacing:.5px}.concept-card h3{font:700 15px Manrope,sans-serif;margin:9px 0 6px}.concept-card p{font-size:11px;line-height:1.55;color:#777985;margin:0}.concept-card .concept-footer{margin-top:14px;padding-top:10px;border-top:1px solid #f0f0f3;display:flex;justify-content:space-between;color:#8b8c95;font-size:10px}.concept-detail{background:#fff;border:1px solid var(--line);border-radius:13px;padding:23px;margin-top:14px}.concept-detail h2{font:700 20px Manrope,sans-serif;margin:7px 0 10px}.concept-detail p{color:#666875;line-height:1.7;font-size:12px}.concept-detail .analogy{background:#f6f5ff;padding:13px;border-radius:8px;color:#555277;font-size:11px;line-height:1.6}.news-list{display:grid;gap:12px}.news-card{background:white;border:1px solid var(--line);border-radius:12px;padding:17px}.news-card-top{display:flex;align-items:center;gap:8px;color:#82838e;font:10px 'DM Mono',monospace}.news-card h3{font:700 15px/1.45 Manrope,sans-serif;margin:10px 0 7px}.news-card>p{font-size:12px;line-height:1.65;color:#70727f;margin:0}.news-summary{background:#f6f5ff;border-radius:8px;padding:11px 13px;margin-top:12px;color:#565676;font-size:11px;line-height:1.6;display:none}.news-summary.open{display:block}.news-actions{display:flex;align-items:center;gap:15px;margin-top:13px}.news-actions a,.news-actions button{color:var(--purple);font-size:10px;font-weight:600;text-decoration:none;border:0;background:none;padding:0}.news-actions a:hover,.news-actions button:hover{text-decoration:underline}.source-note{background:#f4f4f7;border-radius:9px;padding:12px 14px;color:#747580;font-size:10px;line-height:1.6;margin-bottom:14px}.source-note strong{color:#4e4f59}.github-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.practice-tile{padding:15px;border:1px solid var(--line);background:#fff;border-radius:11px;cursor:pointer}.practice-tile:hover{border-color:#c8c4ff}.practice-tile span{font:10px 'DM Mono',monospace;color:#898a94}.practice-tile h3{font:700 12px Manrope,sans-serif;margin:8px 0 5px}.practice-tile p{font-size:10px;color:#777985;line-height:1.5;margin:0}.modal{border:1px solid var(--line);border-radius:16px;padding:25px;width:min(440px,calc(100% - 28px));box-shadow:0 25px 80px #24233330}.modal::backdrop{background:#1d1c2d73;backdrop-filter:blur(2px)}.modal-close{float:right;border:0;background:none;font-size:23px;color:#7c7d87}.modal-eyebrow{font:10px 'DM Mono',monospace;color:var(--purple);letter-spacing:1px}.modal h2{font:700 21px Manrope,sans-serif;margin:8px 0}.modal p{font-size:12px;line-height:1.6;color:#777985}.profile-tags{display:flex;flex-wrap:wrap;gap:7px;margin:14px 0 18px}.profile-tags span{padding:6px 9px;background:#f3f2ff;color:#5a50bf;border-radius:6px;font-size:10px}.field-label{display:block;font-size:11px;font-weight:600;margin-bottom:7px}.modal select{width:100%;height:37px;border:1px solid var(--line);border-radius:8px;background:white;padding:0 10px;font-size:11px}.full-button{width:100%;margin-top:15px}.toast{position:fixed;z-index:5;bottom:20px;left:50%;transform:translate(-50%,20px);opacity:0;pointer-events:none;padding:10px 14px;border-radius:9px;background:#282638;color:#fff;font-size:11px;box-shadow:var(--shadow);transition:.2s}.toast.show{opacity:1;transform:translate(-50%,0)}.empty-note{border:1px dashed #d9d9e2;padding:16px;color:#848590;border-radius:9px;font-size:11px;line-height:1.5}
@media(max-width:1000px){.content{padding:29px 26px 52px}.topbar{padding:0 26px}.sidebar{width:220px}.main-area{margin-left:220px;width:calc(100% - 220px)}.dashboard-grid{grid-template-columns:1fr}.news-inline{grid-template-columns:1fr 1fr}}
@media(max-width:720px){.sidebar{transform:translateX(-100%);transition:transform .2s;width:258px;box-shadow:10px 0 30px #20202b15}.sidebar.open{transform:translateX(0)}.main-area{margin-left:0;width:100%}.topbar{height:56px;padding:0 16px}.mobile-menu{display:block;border:0;background:none;font-size:17px;color:#555662;margin-right:8px}.breadcrumb{margin-right:auto}.today-date{display:none}.content{padding:25px 17px 42px}.welcome-row{align-items:flex-start}.welcome-row h1{font-size:23px}.welcome-row p{max-width:270px;line-height:1.5}.streak{font-size:10px;padding:8px}.hero-card{grid-template-columns:1fr;padding:20px}.hero-card h2{font-size:19px}.hero-card .primary-button{justify-self:start}.dashboard-grid{gap:12px}.news-inline,.concept-grid{grid-template-columns:1fr}.page-heading h1{font-size:24px}.page-heading{align-items:flex-start}.two-col{grid-template-columns:1fr}.github-grid{grid-template-columns:1fr}.quiz-card,.feature-card{padding:18px}.quiz-question{font-size:17px}.task-time{display:none}.top-actions{gap:8px}.hero-meta{flex-wrap:wrap}}
.concept-search-label{display:block;font-size:11px;font-weight:600;margin:0 0 7px}.concept-search{width:min(100%,520px);height:39px;padding:0 12px;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--ink);outline-color:var(--purple)}.concept-search-count{margin:8px 0 14px;color:var(--muted);font-size:11px}.concept-card[hidden]{display:none}
:root[data-theme="dark"] .concept-search{background:#30353d;color:#e8f3f5}
@media(min-width:721px) and (max-width:860px){.content{padding:25px 20px}.topbar{padding:0 20px}.two-col{grid-template-columns:1fr}.github-grid{grid-template-columns:repeat(2,1fr)}}
.concept-detail .concept-body{white-space:normal;line-height:1.8;color:var(--muted);font-size:13px}.concept-detail .concept-body br+br{display:block;content:"";margin-top:8px}
.concept-detail .concept-body{white-space:normal;line-height:1.8;color:var(--muted);font-size:13px}.concept-detail .concept-body br+br{display:block;content:"";margin-top:8px}
.public-demo-card .concept-body{white-space:normal;line-height:1.8;color:var(--muted);font-size:13px;margin:14px 0}

.session-pending{min-height:40vh;display:grid;place-items:center;color:var(--muted,#667085);font-size:15px}