*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--sidebar-w: 220px;--viewport-w: 480px;--viewport-h: 272px}html,body{height:100%;background:#0e0e10;color:#d4d4d8;font-family:system-ui,-apple-system,sans-serif;font-size:14px;line-height:1.6}#app{--bg: #0e0e10;--surface: #18181c;--surface-alt: #1f1f25;--border: #2a2a35;--text: #d4d4d8;--text-dim: #71717a;--accent: #5de0b0;--accent-dim: #27a07a;--code-bg: #111114}#app{display:flex;flex-direction:column;height:100vh;overflow:hidden}#sidebar{flex-shrink:0;background:var(--surface);border-bottom:1px solid var(--border);display:flex;flex-direction:column;overflow-y:auto;max-height:40vh;padding:16px;gap:12px}@media(min-width:768px){#app{flex-direction:row}#sidebar{width:var(--sidebar-w);border-right:1px solid var(--border);border-bottom:none;max-height:none;padding:20px 16px;gap:20px}}#sidebar h1{font-size:14px;font-weight:700;letter-spacing:.04em;color:var(--accent);line-height:1.2;text-transform:uppercase}@media(min-width:768px){#sidebar h1{font-size:18px}}#lesson-list{display:flex;flex-direction:row;gap:4px;overflow-x:auto;flex-wrap:wrap;list-style:none}@media(min-width:768px){#lesson-list{flex-direction:column;flex-wrap:nowrap;overflow-x:visible}}.lesson-card{background:none;border:1px solid transparent;border-radius:6px;padding:6px 8px;text-align:left;cursor:pointer;color:var(--text);width:auto;flex:0 0 auto;transition:background .1s,border-color .1s;white-space:nowrap;min-width:0}@media(min-width:768px){.lesson-card{width:100%;padding:8px 10px;white-space:normal}}.lesson-card:hover{background:var(--surface-alt);border-color:var(--border)}.lesson-card.active{background:var(--surface-alt);border-color:var(--accent-dim)}.lesson-card .name{font-weight:600;font-size:12px;color:var(--text)}.lesson-card .description{font-size:11px;color:var(--text-dim);margin-top:1px;display:none}@media(min-width:768px){.lesson-card .name{font-size:13px}.lesson-card .description{font-size:12px;margin-top:2px;display:block}}#about-section{display:none}@media(min-width:768px){#about-section{display:block}}.about-heading{font-size:11px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--text-dim)}.about-group{border-radius:4px}.about-group summary{font-size:12px;color:var(--text-dim);cursor:pointer;padding:4px 0;list-style:none}.about-group summary:before{content:"▸ ";font-size:10px}.about-group[open] summary:before{content:"▾ "}.about-group p{font-size:12px;color:var(--text-dim);margin-top:6px;line-height:1.5}.about-group a{color:var(--accent-dim)}#content{flex:1;display:flex;flex-direction:column;min-width:0;overflow-y:auto}@media(min-width:768px){#content{flex-direction:row;overflow-y:hidden}}#demo-panel{flex-shrink:0;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:16px;gap:8px}@media(min-width:768px){#demo-panel{flex:0 0 auto;border-right:1px solid var(--border);min-width:calc(var(--viewport-w) + 32px);padding:24px;gap:12px}}#viewport-frame{border:2px solid var(--border);border-radius:4px;box-shadow:0 0 0 1px var(--accent-dim),0 4px 24px #00000080;overflow:hidden;line-height:0;background:#000;max-width:100%}#demo-container{width:min(var(--viewport-w),100%);height:auto;aspect-ratio:480 / 272;position:relative}#demo-container canvas{display:block;width:100%;height:100%}.debug-lesson,.input-viz,.audio-lesson{width:min(var(--viewport-w),100%);height:auto;aspect-ratio:480 / 272;background:#0d0d12;display:flex;flex-direction:column;max-width:100%}@media(min-width:768px){.debug-lesson,.input-viz,.audio-lesson{width:var(--viewport-w);height:var(--viewport-h)}}.debug-title{font-family:ui-monospace,Cascadia Code,Fira Code,monospace;font-size:12px;color:var(--accent);padding:8px 10px;border-bottom:1px solid var(--border)}.debug-log{flex:1;overflow:auto;font-family:ui-monospace,Cascadia Code,Fira Code,monospace;font-size:11px;line-height:1.55;color:#b9f8e2;padding:10px;white-space:pre-wrap}.debug-footer{font-size:11px;color:var(--text-dim);padding:6px 10px;border-top:1px solid var(--border)}.input-viz{align-items:center;justify-content:center;gap:16px}.input-viz-hint{font-size:12px;color:var(--text-dim)}.input-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px;width:100%;max-width:320px}@media(min-width:768px){.input-grid{gap:10px}}.input-pill{border:1px solid var(--border);border-radius:6px;padding:10px;display:flex;justify-content:space-between;align-items:center;font-family:ui-monospace,Cascadia Code,Fira Code,monospace;font-size:12px;color:var(--text);background:#14141a}.input-pill[data-active=true]{border-color:var(--accent-dim);background:#12322a;color:#dbfff4}.audio-lesson{align-items:center;justify-content:center;gap:14px;padding:18px}.audio-status{text-align:center;color:var(--text-dim);font-size:12px;max-width:360px}.audio-enable{border:1px solid var(--accent-dim);background:#12322a;color:#dbfff4;border-radius:6px;padding:8px 12px;font-size:12px;cursor:pointer}.audio-enable[disabled]{opacity:.7;cursor:default}.audio-meter{width:min(320px,100%);height:10px;border:1px solid var(--border);border-radius:999px;overflow:hidden;background:#14141a}.audio-meter-bar{width:0;height:100%;background:linear-gradient(90deg,#27a07a,#5de0b0);transition:width .1s ease-out}.build-lesson{width:min(var(--viewport-w),100%);height:auto;aspect-ratio:480 / 272;background:#0d0d12;display:flex;flex-direction:column;padding:10px;gap:8px;overflow-y:auto;max-width:100%}@media(min-width:768px){.build-lesson{width:var(--viewport-w);height:var(--viewport-h);padding:12px;gap:10px}}.build-lesson h2{font-size:13px;font-weight:600;color:var(--accent);text-transform:uppercase;letter-spacing:.04em}.build-stages{display:flex;flex-direction:column;gap:6px}.build-stage{display:flex;align-items:center;gap:6px;font-size:10px;border:1px solid var(--border);border-radius:4px;padding:6px 8px;background:#14141a}.stage-label{font-weight:600;color:var(--accent-dim);min-width:50px}.stage-files{display:flex;flex-wrap:wrap;gap:4px}.stage-files span{background:#1a1a22;border:1px solid var(--border);border-radius:3px;padding:2px 5px;font-family:ui-monospace,Cascadia Code,Fira Code,monospace;color:var(--text);white-space:nowrap}.stage-arrow{color:var(--accent-dim);flex-shrink:0}.build-notes{font-size:10px;color:var(--text-dim);border-top:1px solid var(--border);padding-top:8px;margin-top:4px}.build-notes h3{font-size:10px;font-weight:600;text-transform:uppercase;letter-spacing:.04em;color:var(--text-dim);margin-bottom:4px}.build-notes ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:3px}.build-notes li{font-size:10px;line-height:1.4}.sdk-explorer{width:min(var(--viewport-w),100%);height:auto;aspect-ratio:480 / 272;background:#0d0d12;color:var(--text);display:flex;flex-direction:column;gap:8px;padding:10px;max-width:100%}@media(min-width:768px){.sdk-explorer{width:var(--viewport-w);height:var(--viewport-h);padding:12px;gap:10px}}.sdk-toolbar{display:flex;flex-direction:column;gap:8px}.sdk-search{display:flex;flex-direction:column;gap:4px;font-size:10px;text-transform:uppercase;letter-spacing:.08em;color:var(--text-dim)}.sdk-search-input{width:100%;border:1px solid var(--border);border-radius:6px;background:#14141a;color:var(--text);padding:7px 9px;font:inherit;font-size:12px}.sdk-search-input:focus{outline:none;border-color:var(--accent)}.sdk-categories{display:flex;flex-wrap:wrap;gap:6px}.sdk-category-chip{border:1px solid var(--border);background:#121218;color:var(--text-dim);border-radius:999px;padding:4px 8px;font-size:10px;text-transform:uppercase;letter-spacing:.08em;cursor:pointer}.sdk-category-chip[data-active=true]{color:#dbfff4;border-color:var(--accent-dim);background:#12322a}.sdk-body{min-height:0;flex:1;display:grid;grid-template-columns:1.1fr 1fr;gap:8px}.sdk-list-pane,.sdk-detail{min-height:0;border:1px solid var(--border);border-radius:8px;background:#121218}.sdk-list-pane{display:flex;flex-direction:column}.sdk-list-heading{padding:8px 9px 6px;border-bottom:1px solid var(--border)}.sdk-count{font-size:10px;color:var(--text-dim);text-transform:uppercase;letter-spacing:.08em}.sdk-function-list{min-height:0;flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:6px;padding:8px}.sdk-function-card{display:flex;flex-direction:column;align-items:flex-start;gap:2px;border:1px solid var(--border);border-radius:6px;background:#171720;color:var(--text);text-align:left;padding:7px 8px;cursor:pointer}.sdk-function-card[data-active=true]{border-color:var(--accent-dim);background:#12322a}.sdk-function-name{font-family:ui-monospace,Cascadia Code,Fira Code,monospace;font-size:11px}.sdk-function-meta{font-size:10px;color:var(--text-dim);text-transform:uppercase;letter-spacing:.08em}.sdk-empty{color:var(--text-dim);font-size:11px;line-height:1.5}.sdk-detail{padding:10px;display:flex;flex-direction:column;gap:8px;overflow-y:auto}.sdk-detail-name{font-size:13px;line-height:1.3;color:var(--accent)}.sdk-detail-signature{font-family:ui-monospace,Cascadia Code,Fira Code,monospace;font-size:10px;line-height:1.5;color:#b9f8e2;white-space:normal}.sdk-detail-summary,.sdk-detail-notes{font-size:11px;line-height:1.5;color:var(--text)}.sdk-detail-pair{display:flex;flex-direction:column;gap:3px}.sdk-detail-label{font-size:10px;color:var(--text-dim);text-transform:uppercase;letter-spacing:.08em}.sdk-detail-value{font-size:11px;line-height:1.5;color:var(--text)}#controls-hint{font-size:11px;color:var(--text-dim);letter-spacing:.02em;text-align:center}@media(min-width:768px){#controls-hint{font-size:12px}}#code-panel{flex:1;min-width:0;display:flex;flex-direction:column;overflow-y:auto;padding:16px;gap:12px}@media(min-width:768px){#code-panel{padding:24px;gap:20px}}#psp-concept-header{display:flex;align-items:baseline;gap:8px;flex-wrap:wrap}@media(min-width:768px){#psp-concept-header{gap:10px}}#psp-concept-header .label{font-size:11px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--text-dim)}#psp-concept-name{font-size:14px;font-weight:600;color:var(--accent);font-family:ui-monospace,Cascadia Code,Fira Code,monospace}#code-snippet{background:var(--code-bg);border:1px solid var(--border);border-radius:6px;padding:12px;overflow-x:auto;font-size:11px;line-height:1.5;flex-shrink:0}@media(min-width:768px){#code-snippet{padding:16px;font-size:12px;line-height:1.6}}#code-snippet code{font-family:ui-monospace,Cascadia Code,Fira Code,monospace;color:var(--text);white-space:pre}#mapping-notes{flex-shrink:0}#mapping-notes h3{font-size:11px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--text-dim);margin-bottom:10px}.mapping-table{width:100%;border-collapse:collapse;font-size:11px;display:block;overflow-x:auto}@media(min-width:768px){.mapping-table{font-size:12px;display:table}}.mapping-table th{text-align:left;font-weight:600;font-size:11px;letter-spacing:.06em;text-transform:uppercase;color:var(--text-dim);padding:6px 10px;border-bottom:1px solid var(--border)}.mapping-table td{padding:7px 10px;border-bottom:1px solid var(--border);vertical-align:top;color:var(--text)}.mapping-table td:first-child,.mapping-table td:nth-child(2){font-family:ui-monospace,Cascadia Code,Fira Code,monospace;font-size:11px;white-space:nowrap}.mapping-table td:nth-child(3){color:var(--text-dim);font-size:12px}.mapping-table tr:last-child td{border-bottom:none}:focus-visible{outline:2px solid var(--accent);outline-offset:2px}


.exploration-site-header{flex:0 0 auto;display:flex;align-items:center;justify-content:space-between;gap:12px;border-bottom:1px solid var(--border,#222233);background:var(--surface,#13131a);padding:8px 16px;z-index:100}
.exploration-site-name{color:var(--text,#d8d8e0);font-weight:700;font-size:14px;text-decoration:none;white-space:nowrap}
.exploration-site-name:hover{text-decoration:underline}
.exploration-site-nav{display:flex;flex-wrap:wrap;gap:6px 14px;align-items:center}
.exploration-site-nav a{color:var(--text-dim,#999);text-decoration:none;font-size:12px}
.exploration-site-nav a:hover,.exploration-site-nav a:focus-visible{color:var(--text,#d8d8e0);text-decoration:underline}
.exploration-nav-dropdown{position:relative}
.exploration-nav-dropdown-menu{display:none;position:absolute;top:100%;left:0;margin-top:4px;padding:4px 0;list-style:none;background:var(--surface,#13131a);border:1px solid var(--border,#222233);border-radius:6px;min-width:12rem;z-index:200}
.exploration-nav-dropdown:hover .exploration-nav-dropdown-menu,.exploration-nav-dropdown:focus-within .exploration-nav-dropdown-menu{display:block}
.exploration-nav-dropdown-menu a{display:block;padding:6px 12px;color:var(--text-dim,#999);text-decoration:none;font-size:12px;white-space:nowrap}
.exploration-nav-dropdown-menu a:hover,.exploration-nav-dropdown-menu a:focus-visible{color:var(--text,#d8d8e0);background:var(--surface-hover,#1a1a24)}
html,body{min-height:100%}
body{display:flex;flex-direction:column;min-height:100vh;min-height:100svh;min-height:100dvh}
#app{flex:1 0 auto;min-height:0}
@media (max-width:720px){.exploration-site-header{flex-wrap:wrap;padding:8px 12px}.exploration-site-nav{gap:6px 10px}}
@media (max-width:768px){html,body{overflow:auto}#app{flex-direction:column}#sidebar{width:100%;min-width:0;max-height:40vh;border-right:none;border-bottom:1px solid var(--border,#222233);overflow-y:auto}#viewport{min-height:50vh}}