/* work/ai-os.html: the personal operating system case study. Colours come from site.css tokens. */
.diagram .src rect { fill: var(--panel); stroke: var(--tick); }
.diagram .src text { fill: var(--ink); font-size: 12px; }
.diagram .wire path { fill: none; stroke: var(--rule); stroke-width: 1.5; }
.diagram .layer rect { fill: var(--surface); stroke: var(--tick); }
.diagram .layer text { fill: var(--muted); font-size: 11px; }
.diagram .layer .lname { fill: var(--ink); font-size: 14px; font-family: var(--font-data); font-weight: 600; }
.diagram .pulse rect { stroke: var(--emit); stroke-opacity: .7; }
.diagram .memory rect { stroke: var(--c-soft); stroke-opacity: .7; }
.diagram .screen rect { stroke: var(--cool); stroke-opacity: .7; }
.diagram .agent rect { stroke-dasharray: 4 5; }
.diagram .dots circle { fill: var(--emit); }
.diagram .dots .hot { fill: var(--c-soft); }

.layers-key { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1px; background: var(--rule); border: 1px solid var(--rule); }
.layers-key li { background: var(--bg); padding: 18px 20px; font-size: var(--step--1); line-height: 1.55; color: var(--muted); }
.layers-key b { color: var(--ink); font-family: var(--font-data); font-weight: 600; display: block; margin-bottom: 4px; }

.clock-wrap { display: grid; grid-template-columns: minmax(240px, 360px) minmax(0, 1fr); gap: 32px; align-items: center; padding: 26px; }
#clock { width: 100%; height: auto; touch-action: none; cursor: grab; user-select: none; -webkit-user-select: none; }
#clock:active { cursor: grabbing; }
#clock .ring { fill: none; stroke: var(--rule); stroke-width: 18; }
#clock .night { fill: none; stroke: #100e0c; stroke-width: 18; }
#clock .tick { stroke: var(--tick); stroke-width: 1; }
#clock .hour { fill: var(--muted); font-family: var(--font-data); font-variant-numeric: tabular-nums; font-size: 10px; text-anchor: middle; dominant-baseline: middle; }
#clock .r { fill: var(--panel); stroke: var(--emit); stroke-width: 2; cursor: pointer; transition: r .25s var(--ease-out), fill .25s; }
#clock .r.hourly { stroke: none; fill: var(--cool); opacity: .35; }
#clock .r.on { fill: var(--emit); r: 9; }
#clock .r.hourly.on { opacity: 1; r: 3; }
#clock .hand { stroke: var(--ink); stroke-width: 1.5; stroke-linecap: round; }
#clock .hub { fill: var(--ink); }
#clock .big { fill: var(--ink); font-family: var(--font-display); font-variant-numeric: tabular-nums lining-nums; font-size: 30px; text-anchor: middle; letter-spacing: -.015em; }
#clock .small { fill: var(--muted); font-family: var(--font-data); font-size: 10px; text-anchor: middle; letter-spacing: .08em; text-transform: uppercase; }
.clock-card { display: grid; gap: 10px; min-height: 180px; align-content: start; }
.clock-card h3 { font-family: var(--font-display); font-weight: 400; font-size: var(--step-2); margin: 0; line-height: 1.1; }
.clock-card p { margin: 0; max-width: 46ch; }
.clock-card .mono { color: var(--emit); }

.chess-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(320px, 100%), 1fr)); gap: 16px; }
.hbars { padding: 18px 18px 6px; display: grid; gap: 12px; }
.hb { display: grid; grid-template-columns: minmax(120px, 190px) 1fr 46px; gap: 12px; align-items: center; font-family: var(--font-data); font-size: var(--step--1); }
.hb i { height: 8px; background: var(--rule); display: block; }
.hb b { display: block; height: 100%; background: var(--muted); transform-origin: left; animation: grow 1.1s var(--ease-out) both; }
.hb.peak b, .chess-grid .panel:last-child .hb:first-child b { background: var(--emit); }
.hb em { font-style: normal; font-family: var(--font-display); font-variant-numeric: tabular-nums lining-nums; text-align: right; color: var(--ink); }
.panel .note { padding: 6px 18px 16px; margin: 0; }
@keyframes grow { from { transform: scaleX(0); } }

.ladder { display: flex; flex-wrap: wrap; gap: 0; border: 1px solid var(--rule); }
.ladder span { flex: 1 1 110px; padding: 12px 14px; font-family: var(--font-data); font-size: var(--step--2); color: var(--muted); border-left: 1px solid var(--rule); position: relative; }
.ladder span:first-child { border-left: 0; color: var(--accent); }
.ladder span.done { color: var(--c-soft); }

@media (max-width: 980px) { .layers-key { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 720px) {
  .layers-key { grid-template-columns: 1fr; }
  .clock-wrap { grid-template-columns: 1fr; padding: 18px; gap: 18px; }
  #clock { max-width: 300px; margin: 0 auto; }
  .hb { grid-template-columns: 1fr 46px; }
  .hb i { grid-column: 1 / -1; grid-row: 2; }
}
@media (prefers-reduced-motion: reduce) {
  .hb b { animation: none; }
  .diagram .dots { display: none; }
}