@import url('/fonts.css');
:root{font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:#202334;background:#f5f6f9;font-synthesis:none;--bg:#f5f6f9;--surface:#fff;--text:#202334;--muted:#727787;--border:#e8e9ef;--purple:#6554c8;--soft:#eeebfb;--green:#c6eba0;--sidebar:#191e2d;--radius:14px}
*{box-sizing:border-box}body{margin:0}button,input,textarea,select{font:inherit}button,a,input,textarea,select{-webkit-tap-highlight-color:transparent}button,a{touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:default;opacity:.48}a{color:inherit;text-decoration:none}button{color:inherit}svg{display:inline-block;vertical-align:middle;flex-shrink:0}p{line-height:1.65}h1,h2,h3,p{margin-top:0}h1,h2,h3{letter-spacing:-.035em}h1{font-size:2rem;line-height:1.25;margin-bottom:10px;font-weight:650}h2{font-size:1.2rem;font-weight:650;margin-bottom:8px}h3{font-size:1.05rem;font-weight:650;margin-bottom:8px}p{margin-bottom:1rem}.muted{color:var(--muted)}.small{font-size:.875rem}.eyebrow{font-size:.75rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}:focus-visible{outline:3px solid #9b83f3;outline-offset:4px}.skip-link{position:fixed;top:-80px;left:20px;z-index:100;background:var(--purple);color:#fff;padding:12px}.skip-link:focus{top:12px}
.app-layout{min-height:100vh;display:grid;grid-template-columns:228px minmax(0,1fr)}.sidebar{background:var(--sidebar);color:#c3c7d3;padding:32px 20px 20px;display:flex;flex-direction:column;position:fixed;inset:0 auto 0 0;width:228px;z-index:30}.brand{display:flex;align-items:center;gap:10px;color:#fff;letter-spacing:.16em;font-size:1.4rem;font-weight:800;padding:0 14px}.brand-mark{background:#c6eba0;color:#1b2730;width:32px;height:32px;border-radius:8px;display:grid;place-items:center}.brand-caption{font-size:.75rem;margin:9px 0 40px 56px;color:#989eaf;letter-spacing:.02em}.nav-label{font-size:.7rem;font-weight:650;letter-spacing:.13em;color:#9299ac;padding:0 14px;margin-bottom:14px}.nav-item{display:flex;align-items:center;gap:12px;border-radius:8px;padding:12px 14px;margin-bottom:5px;font-size:.9rem;min-height:44px;transition:background .15s}.nav-item:hover{background:#262c3e;color:#fff}.nav-item.active{background:#343246;color:#e0d6ff}.nav-item.active svg{color:#c7b1ff}.nav-count{margin-left:auto;font-size:.7rem;background:#45425e;border-radius:5px;padding:2px 6px}.nav-divider{height:1px;background:#303546;margin:25px 13px}.sidebar-footer{margin-top:auto}.sidebar-note{background:#242b3c;border:1px solid #343c4e;border-radius:10px;padding:14px;margin:32px 5px 18px;font-size:.875rem;line-height:1.55}.sidebar-note span{display:block;color:#a6adc0;font-size:.8rem;margin-top:5px}.profile-button{display:flex;width:100%;align-items:center;gap:10px;background:none;border:0;text-align:left;color:#e7e9f0;padding:12px 9px}.avatar{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;background:#d4c7ab;color:#444538;font-size:.75rem;font-weight:700;flex-shrink:0}.profile-text{overflow:hidden}.profile-text strong{font-size:.85rem;display:block;overflow:hidden;text-overflow:ellipsis}.profile-text span{font-size:.73rem;color:#a2aabd}.profile-button>svg{margin-left:auto}.shell{grid-column:2;min-width:0}.topbar{height:77px;border-bottom:1px solid var(--border);background:var(--surface);display:flex;align-items:center;justify-content:space-between;padding:0 40px;gap:24px}.breadcrumb{display:flex;align-items:center;gap:12px;color:var(--muted);font-size:.85rem}.breadcrumb strong{color:var(--text);font-weight:550}.topbar-actions{display:flex;align-items:center;gap:20px}.search-box{position:relative}.search-box input{background:var(--bg);border:1px solid var(--border);border-radius:7px;padding:9px 42px 9px 34px;width:248px;font-size:.8rem}.search-box>svg{position:absolute;left:11px;top:11px;color:var(--muted)}.search-shortcut{position:absolute;right:10px;top:10px;font-size:.7rem;color:var(--muted);padding:1px 5px;background:var(--surface);border:1px solid var(--border);border-radius:4px}.icon-button{border:1px solid var(--border);background:var(--surface);border-radius:8px;width:36px;height:36px;display:inline-grid;place-items:center}.mobile-toggle{display:none}.content{padding:34px 40px 28px;max-width:1540px;margin:0 auto}.page-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:20px;margin-bottom:27px}.page-heading p{color:var(--muted);font-size:.94rem;margin-bottom:0}.heading-meta{display:flex;align-items:center;gap:8px;font-size:.8rem;border:1px solid var(--border);border-radius:7px;background:var(--surface);padding:9px 12px;white-space:nowrap;margin-top:4px}.dashboard-top{display:grid;grid-template-columns:minmax(0,1fr) 265px;gap:22px}.continue-card{border-radius:var(--radius);background:#eae6f8;display:grid;grid-template-columns:1fr 225px;min-height:232px;padding:27px 28px;overflow:hidden;position:relative;color:#30294e}.continue-card .eyebrow{color:#655780;margin-bottom:14px}.continue-card h2{font-size:1.7rem;letter-spacing:-.04em;line-height:1.2;max-width:320px;margin-bottom:10px}.continue-card p{font-size:.86rem;line-height:1.6;max-width:300px;color:#716880;margin-bottom:22px}.continue-card .button{background:#6554c8;color:#fff;border-color:#6554c8;box-shadow:0 3px 5px #56439615}.resume-meta{font-size:.75rem;margin-left:13px;color:#776c8b}.processor-visual{align-self:center;position:relative;display:flex;align-items:center;justify-content:center;min-height:174px}.processor-visual svg{width:225px;height:176px}.goal-card{border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);padding:22px;display:flex;flex-direction:column}.card-top{display:flex;align-items:center;justify-content:space-between;gap:10px}.goal-card h2{font-size:.95rem}.goal-card .week{font-size:.72rem;color:var(--muted)}.goal-body{display:flex;align-items:center;gap:16px;margin:22px 0 15px}.goal-ring{width:86px;height:86px;flex-shrink:0;position:relative}.goal-ring svg{transform:rotate(-90deg)}.goal-ring .center{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center}.goal-ring strong{font-size:1.45rem;line-height:1.1}.goal-ring small{font-size:.68rem;color:var(--muted)}.goal-body p{font-size:.84rem;margin:0}.goal-body strong{font-size:.95rem;font-weight:600}.goal-foot{border-top:1px solid var(--border);padding-top:13px;font-size:.78rem;color:var(--muted);display:flex;align-items:center;gap:7px}.stats-row{display:grid;grid-template-columns:repeat(4,1fr);margin:24px 0 32px;border:1px solid var(--border);background:var(--surface);border-radius:12px;padding:21px 8px}.stat{display:flex;gap:13px;align-items:center;padding:0 20px;border-right:1px solid var(--border)}.stat:last-child{border:0}.icon-tile{width:39px;height:39px;display:grid;place-items:center;border-radius:10px;background:var(--soft);color:var(--purple);flex-shrink:0}.icon-tile.green{background:#edf6e5;color:#598037}.icon-tile.blue{background:#eaf1fc;color:#4d7ec0}.icon-tile.orange{background:#fff0e1;color:#b77c3a}.stat strong{font-size:1.25rem;font-weight:650;display:block;line-height:1.2;letter-spacing:-.025em}.stat small{font-size:.73rem;color:var(--muted);display:block;margin-top:5px}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:16px}.section-heading h2{margin:0}.section-heading .small{font-size:.83rem}.text-link{font-size:.8rem;color:var(--muted);display:inline-flex;align-items:center;gap:6px;background:none;border:0}.text-link:hover{color:var(--purple)}.learning-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:17px}.lesson-card{border:1px solid var(--border);background:var(--surface);border-radius:12px;padding:21px;transition:border-color .2s,transform .2s;min-width:0;display:flex;flex-direction:column}.lesson-card:hover{border-color:#bfb4e9;transform:translateY(-2px)}.lesson-card-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.lesson-number{font-size:.73rem;color:#9196a4;letter-spacing:.03em}.lesson-card h3{font-size:.99rem;letter-spacing:-.025em}.lesson-card p{font-size:.8rem;color:var(--muted);line-height:1.6;min-height:40px;margin-bottom:17px}.lesson-card-footer{display:flex;align-items:center;justify-content:space-between;margin-top:auto;font-size:.73rem;color:var(--muted);gap:10px}.lesson-card-footer span{display:flex;align-items:center;gap:5px}.status-label{background:var(--bg);border-radius:4px;padding:4px 7px;font-size:.68rem}.status-label.done{background:#edf6e5;color:#4c7130}.status-label.current{background:var(--soft);color:var(--purple)}.card-progress{height:3px;background:var(--border);border-radius:2px;margin:17px 0 13px;overflow:hidden}.card-progress>span{display:block;height:100%;background:var(--purple)}.dashboard-bottom{display:grid;grid-template-columns:minmax(0,1fr) 265px;gap:22px;margin-top:30px}.challenge-banner{border:1px solid var(--border);background:var(--surface);border-radius:12px;padding:22px;display:flex;gap:20px;align-items:center}.challenge-banner .icon-tile{width:57px;height:57px;background:#f1f6e9;color:#709646}.challenge-banner h3{font-size:1rem}.challenge-banner p{font-size:.8rem;color:var(--muted);margin-bottom:0}.challenge-banner .button{margin-left:auto;white-space:nowrap}.xp-tag{font-size:.68rem;background:#f0f7e7;color:#53712c;border-radius:5px;display:inline-flex;padding:4px 7px;margin-left:8px;font-weight:600}.quick-lab{border:1px solid var(--border);background:var(--surface);border-radius:12px;padding:19px 21px;display:flex;align-items:center;gap:13px}.quick-lab strong{display:block;font-size:.88rem;margin-bottom:5px}.quick-lab p{font-size:.75rem;color:var(--muted);margin:0}.quick-lab>svg{margin-left:auto}.page-footer{display:flex;align-items:center;justify-content:space-between;border-top:1px solid var(--border);margin-top:35px;padding-top:17px;font-size:.73rem;color:var(--muted);gap:18px}.page-footer a{color:var(--purple)}.storage-status{display:flex;align-items:center;gap:6px}.button{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid var(--border);background:var(--surface);padding:10px 15px;border-radius:7px;font-size:.85rem;font-weight:550;min-height:40px;line-height:1.25}.button:hover{filter:brightness(.97)}.button.primary{background:var(--purple);color:#fff;border-color:var(--purple)}.button.dark{background:#252b3c;color:#fff;border-color:#252b3c}.button.compact{padding:7px 11px;min-height:34px;font-size:.8rem}.button.lime{background:var(--green);color:#273a1e;border-color:var(--green)}.button.ghost{background:transparent;border-color:transparent}.button-row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.panel{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:24px}.panel h2{font-size:1.08rem}.panel-head{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:20px}.panel-head h2{margin:0}.badge{display:inline-flex;align-items:center;gap:5px;padding:5px 8px;border-radius:5px;background:var(--soft);color:var(--purple);font-size:.72rem}.notice{padding:13px 16px;border-radius:8px;background:var(--soft);color:var(--purple);font-size:.875rem;line-height:1.65;margin-bottom:20px}.notice.neutral{background:var(--bg);color:var(--muted)}.notice.error,.feedback.error{background:#fff0ee;color:#a63f34}.notice.success,.feedback.success{background:#eef6e8;color:#406629}.feedback{padding:14px;border-radius:8px;margin-top:16px;font-size:.9rem;line-height:1.6}.back-link{display:inline-flex;align-items:center;gap:6px;font-size:.8rem;color:var(--muted);margin-bottom:20px}.lesson-layout{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:25px}.reading-panel{padding:32px;max-width:800px}.reading-panel h2{font-size:1.23rem;margin:28px 0 12px}.reading-panel h2:first-child{margin-top:0}.reading-panel p{color:var(--muted);font-size:1rem;line-height:1.9}.reading-panel code,.inline-code{background:var(--bg);padding:3px 6px;border-radius:4px;font-family:ui-monospace,monospace}.reading-panel pre{background:#1e2433;color:#d7dfed;border-radius:9px;padding:22px;line-height:1.85;overflow:auto;font-size:.88rem}.lesson-outline{align-self:start;position:sticky;top:24px}.outline-step{display:flex;gap:10px;align-items:center;font-size:.82rem;padding:13px 0;border-bottom:1px solid var(--border);color:var(--muted)}.outline-step span:first-child{font-family:ui-monospace,monospace;font-size:.73rem;color:var(--purple)}.quiz-options{display:grid;gap:10px;margin:18px 0}.quiz-option{display:flex;align-items:center;gap:12px;padding:14px;border:1px solid var(--border);border-radius:8px;font-size:.92rem;cursor:pointer;line-height:1.5}.quiz-option:has(input:checked){border-color:var(--purple);background:var(--soft)}.quiz-option input{accent-color:var(--purple);width:17px;height:17px;flex-shrink:0}.quiz-box{margin-top:28px;padding-top:25px;border-top:1px solid var(--border)}
.tabs{display:flex;align-items:center;gap:7px;margin-bottom:23px;border-bottom:1px solid var(--border);overflow-x:auto}.tab{padding:12px 16px;display:flex;align-items:center;gap:8px;font-size:.875rem;white-space:nowrap;border-bottom:2px solid transparent;color:var(--muted)}.tab.active{border-color:var(--purple);color:var(--purple);font-weight:600}.lab-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:20px}.lab-grid>.panel{min-width:0}.field-label{display:block;font-size:.82rem;font-weight:550;margin-bottom:8px}.input,select{border:1px solid var(--border);background:var(--surface);color:var(--text);border-radius:7px;padding:10px 12px;max-width:100%;min-height:40px}.input{width:100%}.code-editor{display:block;width:100%;background:#1d2433;color:#d8e1ee;border:1px solid #343b4b;border-radius:9px;padding:20px;font-family:ui-monospace,"SFMono-Regular",Consolas,monospace;font-size:.92rem;line-height:1.85;tab-size:2;resize:vertical;min-height:255px;white-space:pre;overflow:auto}.editor-label{display:flex;justify-content:space-between;align-items:center;font-size:.75rem;color:var(--muted);margin:0 0 8px}.editor-toolbar{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap;margin-top:16px}.register-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px;gap:10px}.register-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:7px}.register{border:1px solid var(--border);background:var(--bg);padding:9px 10px;border-radius:7px;min-width:0;transition:background .2s}.register.changed{background:#eef6e6;border-color:#c3d9a9}.register strong{font-size:.78rem;color:var(--muted);display:block;font-weight:500;margin-bottom:5px}.register span{font-size:.88rem;font-family:ui-monospace,monospace;overflow-wrap:anywhere}.register.zero{opacity:.6}.machine-status{display:grid;grid-template-columns:repeat(3,1fr);border:1px solid var(--border);border-radius:8px;margin-top:16px}.machine-status div{padding:12px;border-right:1px solid var(--border)}.machine-status div:last-child{border:0}.machine-status small{font-size:.72rem;color:var(--muted);display:block;margin-bottom:5px}.machine-status strong{font-size:.94rem}.trace-box{margin-top:20px;line-height:1.65;font-size:.85rem;background:var(--bg);border-radius:8px;padding:15px}.trace-box strong{display:block;margin-bottom:3px}.table-wrap{overflow:auto;max-width:100%}table{border-collapse:collapse;width:100%;font-size:.82rem;text-align:left}th{font-size:.73rem;color:var(--muted);font-weight:550;background:var(--bg)}th,td{padding:10px 13px;border-bottom:1px solid var(--border);white-space:nowrap}caption{text-align:left;font-size:.83rem;padding-bottom:12px}.memory-panel{margin-top:20px}.memory-panel .panel-head{margin-bottom:12px}.instruction-help{margin-top:18px;font-size:.8rem;color:var(--muted);line-height:1.7}.instruction-help summary{cursor:pointer;color:var(--text);font-weight:550;padding:6px 0}.instruction-help p{margin-top:12px}.lab-explanation{margin-top:20px;color:var(--muted);font-size:.85rem;line-height:1.75}.pipeline-controls{display:flex;gap:20px;align-items:center;flex-wrap:wrap;margin:17px 0}.switch-label{display:flex;align-items:center;gap:9px;font-size:.86rem}.switch-label input{accent-color:var(--purple);width:18px;height:18px}.pipeline-table td,.pipeline-table th{text-align:center;min-width:40px;padding:9px 5px}.pipeline-table td:first-child,.pipeline-table th:first-child{text-align:left;min-width:200px;padding-left:12px;font-family:ui-monospace,monospace}.stage-cell{border-radius:4px;font-size:.68rem;font-weight:650;padding:6px 4px;display:block;background:#eeeaf9;color:#715da2}.stage-cell.ID{background:#e8effa;color:#5176a3}.stage-cell.EX{background:#fdf0da;color:#9b7a3f}.stage-cell.MEM{background:#e9f2de;color:#6b8743}.stage-cell.WB{background:#e2f2ef;color:#488879}.stage-cell.stall{background:#fff0ed;color:#b56455}.metric-strip{display:flex;gap:25px;margin:22px 0;flex-wrap:wrap}.metric-strip strong{display:block;font-size:1.7rem;letter-spacing:-.04em}.metric-strip small{font-size:.77rem;color:var(--muted)}.cache-config{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:20px 0}.cache-config select{width:100%}.cache-sets{display:grid;grid-template-columns:repeat(auto-fit,minmax(125px,1fr));gap:10px;margin-top:20px}.cache-set{border:1px solid var(--border);border-radius:7px;padding:13px;background:var(--bg)}.cache-set strong{font-size:.78rem;color:var(--muted)}.cache-way{display:block;font-size:.77rem;padding:7px;background:var(--surface);border:1px solid var(--border);border-radius:5px;margin-top:8px;font-family:ui-monospace,monospace}.hit{color:#4f753a}.miss{color:#aa6047}.datapath-svg{width:100%;min-height:250px;color:var(--text)}.datapath-node{fill:var(--bg);stroke:var(--border);stroke-width:2}.datapath-node.on{fill:var(--soft);stroke:#9a85d8}.datapath-wire{fill:none;stroke:#c6cbd5;stroke-width:2}.datapath-wire.on{stroke:#8a70d0;stroke-width:3}.datapath-svg text{fill:var(--text);font-family:inherit;font-size:14px}.datapath-svg .value{fill:var(--muted);font-family:ui-monospace,monospace;font-size:12px}.full-width{grid-column:1/-1}.filter-row{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:24px}.filter-button{border:1px solid var(--border);border-radius:7px;padding:8px 15px;background:var(--surface);font-size:.83rem}.filter-button.active{background:var(--text);color:var(--surface);border-color:var(--text)}.challenge-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.challenge-card{display:flex;flex-direction:column;min-height:240px}.challenge-card .card-top{margin-bottom:20px}.challenge-card p{font-size:.85rem;color:var(--muted);line-height:1.7;flex:1}.challenge-card .button{align-self:flex-start}.challenge-work{max-width:850px;margin:auto}.challenge-work .code-editor{margin-top:22px}.challenge-instructions{font-size:1rem;color:var(--muted);line-height:1.8}.hint-panel{margin-top:16px;color:var(--purple);background:var(--soft);padding:16px;border-radius:8px;font-size:.88rem;line-height:1.7}.progress-grid{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);gap:24px}.mastery-row{margin-bottom:24px}.mastery-heading{display:flex;justify-content:space-between;font-size:.87rem;gap:12px;margin-bottom:9px}.progress-track{height:7px;border-radius:7px;background:var(--bg);overflow:hidden}.progress-track span{height:100%;display:block;background:#9081d5;border-radius:7px}.badge-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.achievement{border:1px solid var(--border);border-radius:9px;text-align:center;padding:20px 9px;background:var(--bg)}.achievement.unlocked{background:#f2f6e9;border-color:#d7e6bd}.achievement .icon-tile{margin:0 auto 12px}.achievement strong{display:block;font-size:.81rem}.achievement small{display:block;font-size:.72rem;line-height:1.55;margin-top:7px;color:var(--muted)}.activity-list{list-style:none;margin:0;padding:0}.activity-list li{display:flex;gap:13px;align-items:center;padding:15px 0;border-bottom:1px solid var(--border)}.activity-list strong{font-size:.87rem;display:block}.activity-list small{font-size:.75rem;color:var(--muted);display:block;margin-top:4px}.activity-list .xp-tag{margin-left:auto}.empty-state{color:var(--muted);font-size:.9rem;padding:30px 10px;text-align:center;line-height:1.8}.glossary-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-top:24px}.glossary-grid .panel{padding:22px}.glossary-grid h2{font-size:1.02rem}.glossary-grid p{color:var(--muted);font-size:.9rem;margin:0}.settings-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}.form-field{margin-bottom:18px}.settings-row{padding:17px 0;border-bottom:1px solid var(--border);display:flex;justify-content:space-between;align-items:center;gap:16px;font-size:.9rem}.settings-row p{font-size:.8rem;color:var(--muted);margin:5px 0 0}.form-help{font-size:.8rem;color:var(--muted);line-height:1.7}.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:#272d3d;color:#fff;box-shadow:0 8px 25px #0002;border-radius:9px;padding:14px 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