:root{--bg: #121212;--panel: #1e1e1e;--surface-node: #232323;--panel-raised: #272727;--surface-menu: #2e2e2e;--border: #2e2e2e;--border-control: #707070;--text: #e0e0e0;--muted: #a0a0a0;--accent: #8fe3ff;--accent-fill: #10303c;--accent-fill-hover: #154050;--accent-border: #2d6a80;--heading: #fff98c;--status-fine: #4fd1a5;--status-busy: #ffb454;--status-over: #ff7a90;--drawer-width: 440px;--font-ui: "Atkinson Hyperlegible Next", system-ui, sans-serif;--font-mono: "Atkinson Hyperlegible Mono", ui-monospace, monospace;--text-small: 14px;--text-ui: 16px;--text-read: 19px;--text-lede: 21px;--leading: 1.6;--space-paragraph: .8em;--space-before-heading: 2.25rem;--space-after-heading: .75rem;--measure: 66ch;color-scheme:dark}*{box-sizing:border-box}:focus-visible{outline:2px solid var(--accent);outline-offset:2px}html,body{height:100%;margin:0}body{display:grid;grid-template-columns:280px 1fr;grid-template-rows:minmax(0,1fr);background:var(--bg);color:var(--text);font-family:var(--font-ui);overflow:hidden}.sidebar{display:flex;flex-direction:column;min-height:0;overflow:hidden;background:var(--panel);border-right:1px solid var(--border)}.sidebar-header{flex:none;display:flex;flex-direction:column;gap:14px;padding:20px 18px 14px;border-bottom:1px solid var(--border)}.sidebar-header h1{margin:0;font-size:18px;font-weight:650;letter-spacing:.01em}.sidebar-header h1 a{color:inherit;text-decoration:none}.sidebar-header h1 a:hover{text-decoration:underline}.nutshell-open{display:flex;flex-direction:column;gap:2px;padding:10px 12px;border:1px solid var(--accent-border);border-radius:10px;background:var(--accent-fill);color:var(--accent);font:inherit;font-size:var(--text-ui);text-align:left;cursor:pointer}.nutshell-open span{color:var(--muted);font-size:var(--text-small)}.nutshell-open:hover,.nutshell-open[aria-pressed=true]{background:var(--accent-fill-hover)}.field{display:flex;flex-direction:column;gap:6px;font-size:var(--text-small);font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.08em}select{width:100%;padding:8px 10px;border:1px solid var(--border-control);border-radius:8px;background:var(--panel-raised);color:var(--text);font:inherit;font-size:var(--text-ui);text-transform:none;letter-spacing:normal;cursor:pointer}.secondary-button,.lesson-open{padding:7px 12px;border:1px solid var(--border-control);border-radius:8px;background:var(--panel-raised);color:var(--text);font:inherit;font-size:var(--text-ui);cursor:pointer}.secondary-button{width:100%;margin-top:10px}.toggle{display:flex;align-items:center;gap:8px;margin-top:12px;color:var(--text);cursor:pointer}.toggle-hint{margin:2px 0 0 26px;font-size:var(--text-small)}.toggle input{margin:0;accent-color:var(--accent)}.secondary-button:hover,.lesson-open:hover{border-color:var(--muted)}.palette{flex:1;min-height:0;overflow-y:auto;padding:0 12px 12px}.palette-group h2{margin:14px 6px 6px;font-size:var(--text-small);font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.08em}.palette-item{display:flex;align-items:center;gap:10px;width:100%;padding:6px;border:1px solid transparent;border-radius:8px;background:none;color:var(--text);font:inherit;font-size:var(--text-ui);text-align:left;cursor:grab}.palette-item:hover{background:var(--panel-raised);border-color:var(--border-control)}.palette-item:active{cursor:grabbing}.badge{display:grid;place-items:center;width:30px;height:30px;border-radius:7px;background:color-mix(in srgb,var(--color) 16%,transparent);color:var(--color);font-family:var(--font-mono);font-size:var(--text-small);font-weight:700}.sidebar-footer{flex:none;padding:14px 18px 18px;border-top:1px solid var(--border);font-size:var(--text-ui);color:var(--muted)}.shortcuts{position:absolute;left:16px;bottom:16px;max-width:400px;border:1px solid var(--border-control);border-radius:10px;background:#272727f5;color:var(--muted);font-size:var(--text-ui);box-shadow:0 8px 20px #00000059}.shortcuts summary{display:flex;align-items:center;min-height:40px;padding:0 12px;list-style:none;cursor:pointer}.shortcuts[open] summary{padding-right:48px;border-bottom:1px solid var(--border)}.shortcuts summary::-webkit-details-marker{display:none}.shortcuts .icon-button{top:4px;right:6px;display:grid;place-items:center;width:32px;height:32px;padding:0}.shortcuts-body{max-height:calc(100vh - 220px);overflow-y:auto}.shortcuts summary:hover,.shortcuts[open] summary{color:var(--text)}.shortcuts section{padding:0 14px 10px}.shortcuts h3{margin:10px 0 4px;color:var(--heading);font-size:var(--text-small);font-weight:650;text-transform:uppercase;letter-spacing:.06em}.shortcuts ul{margin:0;padding:0;list-style:none}.shortcuts li{margin:6px 0}kbd{padding:1px 5px;border:1px solid var(--border);border-radius:4px;background:var(--panel-raised);color:var(--text);font-family:var(--font-mono);font-size:var(--text-small)}.board{position:relative;min-width:0}.board canvas{display:block;width:100%;height:100%;touch-action:none}.drawer{position:absolute;top:16px;right:16px;bottom:16px;width:var(--drawer-width);overflow-y:auto;padding:22px 24px;border:1px solid var(--border);border-radius:14px;background:#272727f5;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);box-shadow:0 18px 40px #00000073;font-size:var(--text-read);line-height:var(--leading)}.drawer[hidden],.lesson-open[hidden]{display:none}.icon-button{position:absolute;top:12px;right:12px;width:28px;height:28px;border:none;border-radius:6px;background:none;color:var(--muted);font-size:24px;line-height:1;cursor:pointer}.icon-button:hover{background:var(--panel-raised);color:var(--text)}.eyebrow{margin:0 0 6px;font-size:var(--text-small);font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.08em}.drawer-title{margin:0;font-size:24px;font-weight:650}.drawer-subtitle{margin:8px 0 0;color:var(--muted)}.drawer-section h3{margin:var(--space-before-heading) 0 var(--space-after-heading);font-size:var(--text-small);font-weight:650;color:var(--heading);text-transform:uppercase;letter-spacing:.06em}.drawer-section p,.drawer-section li{margin:0 0 var(--space-paragraph)}.drawer-section ul{margin:0;padding-left:1.5em}.lesson-open{position:absolute;top:16px;right:16px;box-shadow:0 8px 20px #00000059}.component-header{display:flex;align-items:center;gap:14px}.component-header .badge{flex:none;width:44px;height:44px;border-radius:10px;font-size:var(--text-ui)}.component-header .eyebrow{margin-bottom:2px}.drawer-lede{margin:18px 0 0;font-size:var(--text-lede);line-height:1.5}.drawer-section ul.chips{display:flex;flex-wrap:wrap;gap:6px;padding:0;list-style:none}.chips li{margin:0;padding:4px 10px;border:1px solid var(--border);border-radius:999px;background:var(--panel-raised);font-size:var(--text-ui)}.label-editor{position:absolute;width:200px;padding:4px 12px;border:1px solid var(--accent);border-radius:999px;background:var(--bg);color:var(--text);font:inherit;font-size:var(--text-ui);text-align:center;outline:none;transform:translate(-50%,-50%);box-shadow:0 6px 18px #00000073}.radial-menu{position:absolute;pointer-events:none;filter:drop-shadow(0 8px 18px rgba(0,0,0,.5));transform:translate(-50%,-50%);animation:radial-open .14s ease-out}.radial-menu[hidden]{display:none}@keyframes radial-open{0%{opacity:0;transform:translate(-50%,-50%) scale(.7)}}.radial-menu button{position:absolute;inset:0;padding:0;border:0;background:var(--surface-menu);color:var(--muted);font:inherit;font-size:var(--text-small);pointer-events:auto;cursor:pointer;transition:background .1s,color .1s}.radial-menu button:hover,.radial-menu button:focus-visible{background:#383838;color:var(--text)}.radial-menu button:focus-visible{outline:none}.radial-menu button:focus-visible .radial-content{outline:2px solid var(--accent);outline-offset:4px;border-radius:6px}.radial-menu button[aria-pressed=true]{background:var(--accent-fill);color:var(--accent)}.radial-menu button[data-action=delete]:hover,.radial-menu button[data-action=delete]:focus-visible{background:#3a1a20;color:#ff8a95}.radial-content{position:absolute;left:var(--x);top:var(--y);display:flex;flex-direction:column;align-items:center;gap:2px;white-space:nowrap;transform:translate(-50%,-50%)}.radial-icon{font-size:20px;line-height:1}.sample{margin:0 0 14px}.sample figcaption{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin-bottom:6px;font-size:var(--text-ui);color:var(--muted)}.sample-language{flex:none;font-family:var(--font-mono);font-size:var(--text-small);text-transform:uppercase;letter-spacing:.06em}.sample-scroll{overflow-x:auto;border:1px solid var(--border);border-radius:8px;background:var(--bg)}.sample table{width:100%;border-collapse:collapse;font-family:var(--font-mono);font-size:var(--text-ui);white-space:nowrap}.sample th,.sample td{padding:6px 10px;text-align:left}.sample th{border-bottom:1px solid var(--border);background:var(--panel-raised);color:#ffb454;font-weight:600}.sample tr+tr td{border-top:1px solid var(--border)}.sample pre{margin:0;padding:10px 12px;font-family:var(--font-mono);font-size:var(--text-ui);line-height:1.55;color:var(--text)}.board-actions{position:absolute;top:16px;left:16px;display:flex;gap:8px}.board-button{display:inline-flex;align-items:center;gap:6px;min-height:36px;padding:0 14px;border:1px solid var(--border-control);border-radius:10px;background:var(--panel);color:var(--text);font:inherit;font-size:var(--text-ui);box-shadow:0 8px 20px #00000059;cursor:pointer}.dashed-icon{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:1.5;stroke-dasharray:2.5 2}.board-button[aria-pressed=true]{border-color:var(--accent-border);background:var(--accent-fill);color:var(--accent)}.board-button:hover{background:var(--panel-raised)}.blank-board{min-height:36px;padding:0 14px;border:1px solid var(--accent-border);border-radius:10px;background:var(--accent-fill);color:var(--accent);font:inherit;font-size:var(--text-ui);font-weight:600;box-shadow:0 8px 20px #00000059;cursor:pointer}.blank-board:hover{background:var(--accent-fill-hover)}.toast{position:absolute;left:50%;bottom:24px;z-index:15;display:flex;align-items:center;gap:14px;width:max-content;max-width:min(560px,calc(100% - 32px));padding:8px 8px 8px 16px;border:1px solid var(--border);border-radius:12px;background:var(--surface-menu);font-size:var(--text-ui);box-shadow:0 12px 30px #00000080;transform:translate(-50%)}.toast button{min-height:32px;padding:0 12px;border:0;border-radius:8px;background:var(--accent-fill);color:var(--accent);font:inherit;font-weight:600;cursor:pointer}.eyebrow.status-fine{color:var(--status-fine)}.eyebrow.status-busy{color:var(--status-busy)}.eyebrow.status-over{color:var(--status-over)}.fix-list{margin:0;padding-left:1.5em}.fix-list li{margin:0 0 var(--space-paragraph)}.fix-list li::marker{color:var(--accent);font-weight:650}.fix-list p{margin:4px 0 8px}.fix-action{min-height:36px;padding:0 14px;border:1px solid var(--accent-border);border-radius:8px;background:var(--accent-fill);color:var(--accent);font:inherit;font-size:var(--text-ui);font-weight:600;cursor:pointer}.fix-action:hover{background:var(--accent-fill-hover)}.fix-link{display:inline-block;color:var(--accent);font-size:var(--text-ui)}.legend{position:absolute;right:16px;bottom:16px;width:280px;border:1px solid var(--border-control);border-radius:10px;background:#272727f5;color:var(--muted);font-size:var(--text-small);box-shadow:0 8px 20px #00000059}.board:has(.drawer:not([hidden])) .legend{right:calc(var(--drawer-width) + 32px)}.legend summary{display:flex;align-items:center;min-height:40px;padding:0 12px;font-size:var(--text-ui);list-style:none;cursor:pointer}.legend summary::-webkit-details-marker{display:none}.legend summary:after{content:"▴";margin-left:auto}.legend[open] summary:after{content:"▾"}.legend summary:hover,.legend[open] summary{color:var(--text)}.legend[open] summary{border-bottom:1px solid var(--border)}.legend-body{padding:4px 14px 12px}.legend-worst{margin:10px 0 0;padding:6px 10px;border-radius:8px;background:#3a1a20;color:var(--status-over)}.legend-worst strong{color:var(--status-over)}.legend-worst[hidden]{display:none}.legend-heading{margin:10px 0 6px;color:var(--text)}.legend ul{margin:0;padding:0;list-style:none}.legend li{display:flex;align-items:center;gap:10px;margin:6px 0}.legend-bar{flex:none;width:44px;height:4px;border-radius:2px;background:linear-gradient(to right,var(--color) var(--fill),transparent var(--fill)),#ffffff14}.legend-dot{flex:none;display:grid;place-items:center;width:20px;height:20px;border-radius:50%;color:var(--bg);font-size:12px;font-weight:700}.legend-fine{background:var(--status-fine)}.legend-busy{background:var(--status-busy)}.legend-over{background:var(--status-over)}.legend-note{margin:10px 0 0}.status-chip{position:absolute;z-index:11;width:max-content;max-width:320px;padding:7px 12px 8px;border:1px solid var(--border-control);border-radius:10px;background:var(--surface-menu);box-shadow:0 8px 20px #00000073;font-size:var(--text-small);line-height:1.4;pointer-events:none;transform:translate(-50%,calc(-100% - 8px))}.status-line{display:flex;align-items:center;gap:6px;margin:0;white-space:nowrap}.status-line span:last-child{color:var(--muted)}.status-line strong{color:var(--status-color)}.status-dot{flex:none;width:8px;height:8px;border-radius:50%;background:var(--status-color)}.status-figures{margin:3px 0 0;color:var(--text)}.status-detail{margin:3px 0 0;color:var(--muted)}.status-detail[hidden]{display:none}.status-chip[data-tone=fine]{--status-color: var(--status-fine)}.status-chip[data-tone=busy]{--status-color: var(--status-busy)}.status-chip[data-tone=over]{--status-color: var(--status-over)}.status-chip[data-tone=idle]{--status-color: var(--muted)}.users-picker{position:absolute;z-index:12;width:260px;padding:10px;border:1px solid var(--border-control);border-radius:12px;background:var(--surface-menu);box-shadow:0 12px 30px #00000080;transform:translate(-50%,calc(-100% - 10px))}.users-picker-title{margin:2px 6px 8px;color:var(--heading);font-size:var(--text-small);font-weight:650;text-transform:uppercase;letter-spacing:.06em}.users-options{display:grid;gap:2px}.users-options button{display:flex;justify-content:space-between;align-items:baseline;gap:12px;padding:8px 10px;border:0;border-radius:8px;background:none;color:var(--text);font:inherit;font-size:var(--text-ui);text-align:left;cursor:pointer}.users-options button span{color:var(--muted);font-size:var(--text-small)}.users-options button:hover{background:var(--panel-raised)}.users-options button[aria-checked=true]{background:var(--accent-fill);color:var(--accent)}.toast-error{border-color:#ff8a95}.toast-error button{background:#3a1a20;color:#ff8a95}.file-actions{display:grid;grid-template-columns:1fr 1fr;margin-top:12px;border:1px solid var(--border-control);border-radius:8px;overflow:hidden}.file-actions button{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:34px;padding:0 10px;border:0;background:none;color:var(--muted);font:inherit;font-size:var(--text-small);cursor:pointer;transition:background .1s,color .1s}.file-actions button+button{border-left:1px solid var(--border-control)}.file-actions button:hover{background:var(--panel-raised);color:var(--text)}.file-actions svg{width:14px;height:14px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}.file-hint{margin:8px 0 0;font-size:var(--text-small)}.drop-zone{position:absolute;inset:12px;z-index:20;display:grid;place-items:center;border:2px dashed 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var(--border-control);border-radius:10px;background:var(--panel);color:var(--text);font:inherit;text-align:left;cursor:pointer}.nutshell-signal:hover{border-color:var(--accent-border)}.nutshell-signal-name{color:var(--muted)}@media(max-width:720px){body{grid-template-columns:1fr}.sidebar{position:fixed;inset:0 auto 0 0;z-index:20;width:min(300px,85vw);transform:translate(-100%);visibility:hidden;transition:transform .2s ease,visibility 0s .2s}.menu-open .sidebar{transform:none;visibility:visible;transition:transform .2s ease}.menu-open .menu-backdrop{display:block;position:fixed;inset:0;z-index:19;background:#00000080}.menu-toggle{display:grid;place-items:center;position:absolute;top:12px;left:12px;width:40px;height:40px;border:1px solid var(--border-control);border-radius:10px;background:var(--panel);color:var(--text);font-size:20px;box-shadow:0 8px 20px #00000059;cursor:pointer}.drawer{inset:auto 8px 8px;width:auto;max-height:50%}.lesson-open{top:12px;right:12px}.board-actions{top:14px;left:62px;flex-direction:column;align-items:flex-start}.wide-only,.shortcuts{display:none}.legend{right:auto;left:12px;bottom:12px;width:min(280px,calc(100% - 80px))}.board:has(.drawer:not([hidden])) .legend{display:none}.zoom-controls{position:absolute;top:50%;right:12px;transform:translateY(-50%);transition:top .2s ease;display:flex;flex-direction:column;border:1px solid var(--border-control);border-radius:12px;background:var(--panel);box-shadow:0 8px 20px #00000059;overflow:hidden}.board:has(.drawer:not([hidden])) .zoom-controls{top:25%}.zoom-controls button{width:44px;height:44px;border:0;background:none;color:var(--text);font:inherit;font-size:22px;cursor:pointer}.zoom-controls button+button{border-top:1px solid var(--border)}.zoom-controls button:active{background:var(--panel-raised)}.nutshell-signal{grid-template-columns:1fr;gap:2px}}@media(prefers-contrast:more){:root{--border: #444444;--border-control: #8f8f8f;--text: #f5f5f5;--muted: #c2c2c2}}