.solid-state-page{--ss-bg:#f5f4ee;--ss-surface:#fffef9;--ss-text:#182a2b;--ss-muted:#607270;--ss-line:#d7ded8;--ss-dock-height:clamp(190px,26dvh,240px);background:var(--ss-bg);color:var(--ss-text)}
.solid-state-page.ss-dark{--ss-bg:#142324;--ss-surface:#1b3031;--ss-text:#e6eee8;--ss-muted:#adc3bc;--ss-line:#3a5352}
.solid-state-page [hidden]{display:none!important}
.ss-intro{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:13px 24px;font-family:var(--sans);border-bottom:1px solid var(--ss-line)}
.ss-brandline,.ss-layout-actions{display:flex;align-items:center;gap:12px;min-width:0}.ss-brandline a{font-size:12px;text-decoration:none;color:var(--ss-muted);white-space:nowrap}.ss-brand-divider{color:var(--ss-line)}.ss-intro h1{margin:0;font-size:18px;line-height:1.5;letter-spacing:-.4px;color:var(--ss-text);white-space:nowrap}.ss-subtitle{font-size:11px;color:var(--ss-muted)}
.ss-intro button,.ss-workspace button{font:12px/1.4 var(--sans);min-height:34px;padding:7px 11px;border-radius:6px;cursor:pointer}.ss-layout-actions button{border:1px solid var(--ss-line);background:var(--ss-surface);color:var(--ss-text);white-space:nowrap}.ss-layout-actions #ss-theme{font-size:19px;min-width:34px;padding:4px}
.ss-workspace{display:grid;grid-template-columns:176px minmax(0,1fr) 350px;gap:12px;padding:12px;font:13px/1.7 var(--sans);position:relative;min-width:0}.ss-workspace h2,.ss-workspace h3{color:var(--ss-text)}
.ss-workbench{height:100dvh;overflow:hidden;display:flex;flex-direction:column}.ss-workbench>.site-header{flex:none}.ss-workbench>main{overflow:hidden;display:flex;flex-direction:column;min-height:0;flex:1}.ss-workbench .ss-intro{flex:none}.ss-workbench .ss-workspace{flex:1;min-height:0;overflow:hidden}.ss-workbench>.site-footer{display:none}
.ss-workspace.ss-nav-hidden{grid-template-columns:minmax(0,1fr) 350px}.ss-workspace.ss-reading-hidden{grid-template-columns:176px minmax(0,1fr)}.ss-workspace.ss-nav-hidden.ss-reading-hidden,.ss-workspace.ss-focus{grid-template-columns:minmax(0,1fr)}
.ss-nav{min-height:0;overflow:auto;overscroll-behavior:contain;scrollbar-width:thin;padding:8px 6px 10px 2px}.ss-panel-heading{display:flex;justify-content:space-between;gap:8px;align-items:center;margin:0 4px 13px}.ss-panel-heading strong{font-size:12px}.ss-panel-heading span{font-size:10px;color:var(--ss-muted)}.ss-nav nav{display:grid;margin:12px 0 20px;gap:3px}.ss-nav a{display:block;padding:9px 8px;text-decoration:none;border-radius:6px;border-left:2px solid transparent;line-height:1.6;color:var(--ss-muted);font-size:11px}.ss-nav a:hover{background:var(--ss-surface)}.ss-nav a.active{background:var(--ss-surface);border-color:var(--forest);color:var(--ss-text);font-weight:700}.ss-nav small{font-size:10px;color:var(--coral);margin-right:4px}
.ss-workspace select,.ss-workspace input:not([type=checkbox]):not([type=range]):not([type=file]){min-width:0;max-width:100%;width:100%;border:1px solid var(--ss-line);background:var(--ss-surface);color:var(--ss-text);padding:8px;border-radius:5px;font:12px var(--sans)}.ss-workspace input[type=range]{width:100%;accent-color:var(--forest);margin:8px 0}.ss-workspace label{font-size:11px;display:grid;gap:5px;color:var(--ss-muted);min-width:0}.ss-workspace details{border-top:1px solid var(--ss-line);padding:10px 0}.ss-workspace summary{cursor:pointer;font-size:12px;color:var(--ss-muted)}
.ss-experiment{min-width:0;min-height:0;display:flex;flex-direction:column;border:1px solid var(--ss-line);border-radius:10px;background:var(--ss-surface);overflow:hidden}.ss-view-heading{display:flex;justify-content:space-between;align-items:center;gap:10px;flex:none;padding:10px 14px;font-size:10px;color:var(--ss-muted);border-bottom:1px solid var(--ss-line)}#ss-scene-name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.ss-live-label{display:flex;align-items:center;gap:5px;white-space:nowrap;font-size:10px}.ss-live-label i{width:5px;height:5px;border-radius:50%;background:#499480}
.ss-stage{position:relative;flex:1;min-height:210px;isolation:isolate;background:#e8eeea}#ss-viewer{height:100%;min-height:210px;position:absolute;inset:0;overflow:hidden;touch-action:pan-y}#ss-viewer canvas{display:block;width:100%;height:100%;touch-action:none}.ss-stage-top,.ss-camera{position:absolute;z-index:2;display:flex;gap:6px;pointer-events:none}.ss-stage-top{top:12px;right:12px}.ss-stage-top button,.ss-camera button{pointer-events:auto;border:1px solid #d2ded5;background:#fffef9ed;color:#284c48;box-shadow:0 2px 9px #193d3210;backdrop-filter:blur(8px);font-size:10px;min-height:32px;padding:6px 9px}.ss-stage-top button[aria-pressed=true]{background:#0e5b52;color:#fff;border-color:#0e5b52}.ss-camera{bottom:31px;left:12px;right:12px;justify-content:space-between;align-items:flex-end;flex-wrap:wrap}.ss-axis-buttons,.ss-view-buttons{display:flex;gap:4px;pointer-events:auto}.ss-hint{position:absolute;bottom:6px;left:14px;right:14px;margin:0;pointer-events:none;text-align:center;font-size:9px;color:#506e66}.ss-dark .ss-stage{background:#243e3c}.ss-dark .ss-hint{color:#bfd0c8}.ss-dark .ss-stage-top button,.ss-dark .ss-camera button{background:#1b3031ef;border-color:#527069;color:#e6eee8}
#ss-fallback{position:absolute;inset:0;overflow:auto;padding:55px 14px 85px;background:var(--ss-surface)}#ss-fallback p{font-size:12px;margin:0}#ss-projection{width:100%;height:calc(100% - 65px);min-height:100px}#ss-recover{position:relative}
.ss-inspector{height:var(--ss-dock-height);flex:none;min-height:0;display:flex;flex-direction:column;border-top:1px solid var(--ss-line)}.ss-inspector-heading{display:flex;align-items:center;justify-content:space-between;gap:8px;flex:none;padding:5px 9px;background:var(--ss-surface);border-bottom:1px solid var(--ss-line)}.ss-inspector-heading [role=tablist]{display:flex;gap:3px}.ss-inspector-heading button{background:transparent;color:var(--ss-muted);border:1px solid transparent;font-size:11px;min-height:30px;padding:6px 9px}.ss-inspector-heading [aria-selected=true]{background:var(--ss-bg);color:var(--ss-text);border-color:var(--ss-line)}.ss-inspector-content{flex:1;min-height:0;overflow:auto;overscroll-behavior:contain;scrollbar-width:thin;padding:0 14px 12px}.ss-inspector-collapsed .ss-inspector{height:auto}.ss-focus .ss-inspector{display:none}
.ss-controls,.ss-control-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px 16px;margin:14px 0}.ss-controls .wide{grid-column:1/-1}.ss-controls output{font-variant-numeric:tabular-nums;font-size:10px}.ss-display{border:0!important}.ss-summary{border-left:3px solid var(--gold);padding:10px 12px;background:var(--ss-bg);font-size:11px;line-height:1.8;white-space:pre-line}.ss-controls button[aria-pressed=true]{background:var(--coral)}#ss-error{flex:none;font-size:12px;color:#b73931;padding:8px 14px;margin:0;border-top:1px solid var(--ss-line);max-height:65px;overflow:auto}#ss-error:empty{display:none}
.ss-reading{min-width:0;min-height:0;display:flex;flex-direction:column;border:1px solid var(--ss-line);border-radius:10px;overflow:hidden;background:var(--ss-surface)}.ss-reading-toolbar{flex:none;display:flex;justify-content:space-between;align-items:center;padding:5px 8px;border-bottom:1px solid var(--ss-line);gap:8px}.ss-reading-toolbar nav{display:flex;gap:3px}.ss-reading-toolbar button{background:transparent;border:0;color:var(--ss-muted);font-size:11px}.ss-reading-toolbar button:hover{background:var(--ss-bg);color:var(--ss-text)}.ss-reading-scroll{padding:20px;min-height:0;overflow:auto;overscroll-behavior:contain;scrollbar-width:thin;scroll-behavior:smooth}.ss-reading h2{font-size:25px;line-height:1.4;margin:10px 0 16px}.ss-question{font-size:15px;line-height:1.9}.ss-reading #ss-prerequisites{font-size:11px;color:var(--ss-muted)}.ss-guide{background:var(--ss-bg);border:1px solid var(--ss-line);border-radius:8px;padding:16px;margin:20px 0}.ss-guide h3{font-size:17px;line-height:1.65}.ss-guide p{line-height:1.85}.ss-guide .eyebrow{margin-top:0}.ss-step-buttons{display:flex;align-items:center;flex-wrap:wrap;gap:6px;margin-top:14px}.ss-step-buttons button{background:transparent;color:var(--ss-text);border:1px solid var(--ss-line);font-size:11px}.ss-prose{line-height:1.95;overflow-wrap:anywhere}.ss-prose h3{font-size:18px;margin-top:26px}.ss-prose h2,.ss-prose h1{font-size:21px;line-height:1.5;margin:28px 0 15px}.ss-prose table,.ss-table-wrap table{border-collapse:collapse;font-size:11px;width:100%;display:block;overflow:auto}.ss-prose th,.ss-prose td,.ss-table-wrap th,.ss-table-wrap td{padding:7px;border-bottom:1px solid var(--ss-line);text-align:left}.ss-prose pre,pre#ss-matrices{white-space:pre-wrap;overflow-wrap:anywhere;font-size:10px;line-height:1.7}.ss-prose .math{font-family:Cambria,Georgia,serif;overflow-x:auto;background:var(--ss-surface);padding:12px}.ss-table-wrap{max-height:220px;overflow:auto}.ss-table-wrap button{padding:5px;min-height:30px;font-size:10px}.ss-reading .katex-display{overflow:auto}.ss-prose blockquote{border-left:3px solid var(--gold);padding-left:12px;margin-left:0}.ss-prose li{margin-bottom:8px}.ss-exercise{border-top:1px solid var(--ss-line);padding:20px 0}.ss-exercise legend{font-weight:700;line-height:1.8}.ss-exercise fieldset{border:0;padding:0;min-width:0}.ss-exercise label{display:flex;gap:10px;align-items:flex-start;padding:8px 0;color:var(--ss-text);font-size:12px}.ss-feedback{padding:10px;background:var(--ss-bg)}.ss-mastery{border-left:3px solid var(--forest);padding-left:14px}.ss-progress-buttons{display:flex;gap:6px;flex-wrap:wrap}.ss-nav #ss-import{max-width:100%;font-size:10px}
@media(min-width:1700px){.ss-workspace{grid-template-columns:200px minmax(0,1fr) 400px}.ss-workspace.ss-nav-hidden{grid-template-columns:minmax(0,1fr) 400px}.ss-workspace.ss-reading-hidden{grid-template-columns:200px minmax(0,1fr)}.ss-reading-scroll{padding:26px}.ss-controls,.ss-control-grid{grid-template-columns:repeat(4,minmax(0,1fr))}}
@media(max-width:1150px){.ss-subtitle{display:none}.ss-workspace{grid-template-columns:154px minmax(0,1fr) 305px;gap:8px;padding:8px}.ss-workspace.ss-nav-hidden{grid-template-columns:minmax(0,1fr) 305px}.ss-workspace.ss-reading-hidden{grid-template-columns:154px minmax(0,1fr)}.ss-controls,.ss-control-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.ss-reading-scroll{padding:16px}.ss-camera{gap:5px}.ss-camera button{padding:6px 7px}.ss-intro{padding:10px 16px}}
@media(max-width:900px){.ss-workspace,.ss-workspace.ss-nav-hidden,.ss-workspace.ss-reading-hidden{grid-template-columns:minmax(0,1fr)}.ss-nav{position:absolute;z-index:7;left:8px;top:8px;bottom:8px;width:230px;background:var(--ss-surface);border:1px solid var(--ss-line);border-radius:10px;box-shadow:12px 0 40px #152c3026;padding:16px}.ss-reading{position:absolute;z-index:5;right:8px;top:8px;bottom:8px;width:340px;box-shadow:-10px 0 35px #152c3020}.ss-intro h1{font-size:16px}.ss-controls,.ss-control-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(max-width:650px){.solid-state-page{--ss-dock-height:clamp(210px,34dvh,300px)}.ss-intro{padding:8px 12px;gap:6px;flex-wrap:wrap}.ss-brandline{gap:7px}.ss-brandline a{font-size:10px}.ss-intro h1{font-size:14px}.ss-layout-actions{gap:5px;margin-left:auto}.ss-layout-actions button{font-size:11px;min-height:32px;padding:6px 8px}.ss-brand-divider{display:none}.ss-workspace{padding:6px;gap:0}.ss-view-heading{padding:8px 10px}.ss-stage{min-height:195px}#ss-viewer{min-height:195px}.ss-stage-top{top:9px;right:9px;gap:4px}.ss-stage-top button{min-height:36px}.ss-camera{left:8px;right:8px;bottom:24px;gap:5px}.ss-camera button{min-height:36px;font-size:10px}.ss-hint{font-size:8px;bottom:5px}.ss-controls,.ss-control-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px 14px}.ss-inspector-content{padding:0 12px 12px}.ss-inspector-heading button{min-height:36px}.ss-reading{top:auto;bottom:7px;left:7px;right:7px;width:auto;height:var(--ss-dock-height);border-radius:0 0 9px 9px;box-shadow:0 -8px 30px #152c3012}.ss-reading-scroll{padding:14px}.ss-workspace:not(.ss-reading-hidden) .ss-inspector{visibility:hidden}.ss-workspace:not(.ss-reading-hidden) .ss-inspector-collapsed{visibility:visible}.ss-reading-toolbar button{min-height:36px}.ss-workspace.ss-inspector-collapsed:not(.ss-reading-hidden) .ss-inspector{height:var(--ss-dock-height)}.ss-reading h2{font-size:23px}.ss-nav{top:6px;bottom:6px;left:6px}.ss-nav a{padding:10px 8px}.ss-experiment{border-radius:9px}}
@media(max-height:620px) and (min-width:651px){.solid-state-page{--ss-dock-height:160px}.ss-stage,#ss-viewer{min-height:140px}.ss-intro{padding-top:5px;padding-bottom:5px}.ss-reading-scroll{padding:12px}}
@media(prefers-reduced-motion:reduce){.solid-state-page,.ss-reading-scroll{scroll-behavior:auto}.solid-state-page *{animation:none!important;transition:none!important}}
/* Without JavaScript, the complete sequential lecture remains document content. */
.solid-state-page:not(.ss-workbench) .ss-workspace{display:none}.solid-state-page:not(.ss-workbench) .ss-layout-actions{display:none}

.ss-controls label:has(input[type=checkbox]),.ss-control-grid label:has(input[type=checkbox]){display:flex;align-items:center;align-self:end;gap:8px;min-height:36px;padding:7px 9px;border-radius:5px;background:var(--ss-bg);color:var(--ss-text)}.ss-workspace input[type=checkbox]{accent-color:var(--forest);width:16px;height:16px;flex:none;margin:0}

@media(max-height:650px) and (max-width:650px){.solid-state-page{--ss-dock-height:180px}.ss-stage,#ss-viewer{min-height:150px}}
@media(max-height:480px){.solid-state-page{--ss-dock-height:128px}.solid-state-page .header-inner{min-height:50px}.ss-intro{padding:4px 12px}.ss-view-heading{display:none}.ss-stage,#ss-viewer{min-height:90px}.ss-camera{bottom:23px}.ss-stage-top{top:7px}.ss-stage-top button,.ss-camera button{min-height:28px;padding-top:4px;padding-bottom:4px}}

/* Course and an independent exploration workspace share the same canvas. */
.ss-mode-switch{display:flex;flex:none;gap:3px;padding:3px;border:1px solid var(--ss-line);border-radius:8px;background:var(--ss-bg);font-family:var(--sans)}.ss-mode-switch button{border:0;background:transparent;color:var(--ss-muted);white-space:nowrap;min-height:30px;font-size:12px;padding:6px 13px}.ss-mode-switch button[aria-pressed=true]{background:var(--forest);color:#fff;box-shadow:0 2px 5px #143a3020}.ss-subtitle{display:none}
.ss-workspace.ss-exploring{grid-template-columns:280px minmax(0,1fr)}.ss-workspace.ss-exploring.ss-nav-hidden,.ss-workspace.ss-exploring.ss-focus{grid-template-columns:minmax(0,1fr)}
.ss-explorer{min-width:0;min-height:0;overflow:auto;overscroll-behavior:contain;scrollbar-width:thin;background:var(--ss-surface);border:1px solid var(--ss-line);border-radius:9px;padding:16px}.ss-explore-heading h2{font-size:19px;margin:0 0 4px}.ss-explore-heading p{font-size:11px;color:var(--ss-muted);margin:0 0 15px}.ss-explore-filebar{display:grid;grid-template-columns:1fr 1fr;gap:7px;margin:10px 0 15px}.ss-explore-filebar button{font-size:11px;border:1px solid var(--ss-line);background:var(--ss-bg);color:var(--ss-text)}.ss-explorer>h3{font-size:13px;margin:22px 0 10px}.ss-explore-fields{display:grid;gap:13px;padding:10px 0}.ss-explorer .ss-explore-field{display:grid;gap:6px;position:relative;font-size:11px}.ss-explorer .ss-explore-check{display:flex;align-items:center;padding:7px 0;gap:8px;color:var(--ss-text)}.ss-explore-field output{font-size:10px;font-variant-numeric:tabular-nums;position:absolute;right:0;bottom:0}.ss-explore-field:has(output){padding-bottom:8px}#ss-explore-objects{color:var(--ss-muted);font-size:11px;border-top:1px solid var(--ss-line);padding-top:14px}.ss-explore-selection{font-size:11px;overflow-wrap:anywhere;background:var(--ss-bg);padding:10px;border-radius:5px}#ss-explore-status{font-size:11px;background:var(--ss-bg);padding:9px;position:sticky;top:0;z-index:3;border:1px solid var(--ss-line);border-radius:6px;overflow-wrap:anywhere}#ss-explore-status:empty{display:none}#ss-explore-status[data-error=true]{color:#ad4438;background:#fff1e9}
.ss-related{padding:14px;border-left:3px solid var(--forest);background:var(--ss-bg);margin:24px 0}.ss-related p{font-size:12px;margin:8px 0 0}#ss-board-sources img{display:block;max-width:100%;height:auto;margin:14px 0;border-radius:6px}
@media(max-width:900px){.ss-workspace.ss-exploring{grid-template-columns:minmax(0,1fr)}.ss-explorer{position:absolute;z-index:7;left:8px;top:8px;bottom:8px;width:280px;box-shadow:10px 0 30px #162d3020}}
@media(max-width:650px){.ss-intro{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:6px}.ss-brandline a{font-size:9px}.ss-brandline h1{font-size:12px}.ss-mode-switch{grid-column:1/-1;grid-row:2;justify-content:center;padding:2px}.ss-mode-switch button{flex:1;min-height:28px;font-size:11px}.ss-layout-actions{grid-column:2;grid-row:1;gap:4px}.ss-layout-actions button{font-size:10px;padding:6px}.ss-explorer{top:auto;bottom:7px;left:7px;right:7px;width:auto;height:var(--ss-dock-height);border-radius:0 0 9px 9px;box-shadow:0 -8px 25px #162d3014;padding:12px}.ss-exploring:not(.ss-nav-hidden) .ss-inspector{visibility:hidden}.ss-exploring:not(.ss-nav-hidden).ss-inspector-collapsed .ss-inspector{height:var(--ss-dock-height)}.ss-explore-filebar{margin:8px 0}.ss-explore-fields{grid-template-columns:repeat(2,minmax(0,1fr));gap:13px}.ss-explore-heading{display:flex;justify-content:space-between;align-items:center;gap:10px}.ss-explore-heading h2{font-size:15px}.ss-explore-heading p{font-size:10px;margin:0}.ss-explorer>h3{margin-top:14px}.ss-explore-fields>label:has(input[type=checkbox]){align-self:end;min-height:36px}}
@media(max-height:480px){.ss-intro{gap:4px}.ss-mode-switch button{min-height:24px;padding:4px 10px}.ss-mode-switch{padding:1px}.ss-layout-actions button{min-height:28px}.ss-brandline h1{font-size:12px}}