:root {
  --bg: #f4f2ee;
  --surface: #fbfaf7;
  --surface-2: #efece6;
  --line: #dcd7ce;
  --text: #1c1f24;
  --muted: #5f646c;
  --accent: #8a6a2f;
  --accent-ink: #fbfaf7;
  --accent-soft: #efe4cf;
  --ok: #2f6b4a;
  --ok-soft: #dcebe1;
  --warn: #8a5a14;
  --warn-soft: #f3e4c8;
  --err: #9b3434;
  --err-soft: #f2dcdc;
  --shadow: 0 1px 2px rgba(60, 50, 30, .06), 0 8px 24px rgba(60, 50, 30, .06);
  --r: 10px;
  --mono: 'Geist Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  --sans: 'Geist', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme='light']) {
    --bg: #15171a; --surface: #1c1f23; --surface-2: #23272c; --line: #30353c; --text: #e8e4dc; --muted: #9aa0a8;
    --accent: #c9a86a; --accent-ink: #1a1712; --accent-soft: #3a3222; --ok: #7fbf98; --ok-soft: #1f3329;
    --warn: #e0b36a; --warn-soft: #3b2f1c; --err: #e39090; --err-soft: #3b2222; --shadow: 0 1px 2px rgba(0,0,0,.3), 0 10px 30px rgba(0,0,0,.25);
  }
}
:root[data-theme='dark'] {
  --bg: #15171a; --surface: #1c1f23; --surface-2: #23272c; --line: #30353c; --text: #e8e4dc; --muted: #9aa0a8;
  --accent: #c9a86a; --accent-ink: #1a1712; --accent-soft: #3a3222; --ok: #7fbf98; --ok-soft: #1f3329;
  --warn: #e0b36a; --warn-soft: #3b2f1c; --err: #e39090; --err-soft: #3b2222; --shadow: 0 1px 2px rgba(0,0,0,.3), 0 10px 30px rgba(0,0,0,.25);
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--text); font: 15px/1.55 var(--sans); -webkit-font-smoothing: antialiased; }
a { color: var(--accent); }
h1, h2, h3 { line-height: 1.15; letter-spacing: -.02em; margin: 0; }
h1 { font-size: clamp(1.6rem, 1.2rem + 1.6vw, 2.4rem); font-weight: 650; }
h2 { font-size: 1.2rem; font-weight: 620; }
h3 { font-size: .95rem; font-weight: 600; }
p { margin: 0; }
code, .mono { font-family: var(--mono); font-size: .86em; }
button, input, select, textarea { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 6px; }
.btn { display: inline-flex; align-items: center; gap: .45rem; border: 1px solid var(--line); background: var(--surface); padding: .5rem .9rem; border-radius: var(--r); cursor: pointer; font-weight: 550; transition: background .15s, border-color .15s, transform .1s; white-space: nowrap; }
.btn:hover { background: var(--surface-2); }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn.primary:hover { filter: brightness(1.06); }
.btn.danger { color: var(--err); }
.btn.sm { padding: .3rem .6rem; font-size: .85rem; }
.btn.ghost { border-color: transparent; background: transparent; }
.field { display: grid; gap: .3rem; }
.field label { font-size: .82rem; color: var(--muted); font-weight: 550; }
.input, select.input, textarea.input { width: 100%; border: 1px solid var(--line); background: var(--surface); border-radius: var(--r); padding: .55rem .7rem; }
.input:focus { border-color: var(--accent); outline: none; box-shadow: 0 0 0 3px var(--accent-soft); }
.muted { color: var(--muted); }
.small { font-size: .84rem; }
.row { display: flex; gap: .6rem; align-items: center; flex-wrap: wrap; }
.stack { display: grid; gap: 1rem; }
.pill { display: inline-flex; align-items: center; gap: .3rem; padding: .1rem .55rem; border-radius: 999px; font-size: .76rem; font-weight: 600; background: var(--surface-2); color: var(--muted); }
.pill.ok { background: var(--ok-soft); color: var(--ok); }
.pill.warn { background: var(--warn-soft); color: var(--warn); }
.pill.err { background: var(--err-soft); color: var(--err); }
.pill.accent { background: var(--accent-soft); color: var(--accent); }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); padding: 1.1rem 1.2rem; box-shadow: var(--shadow); }
.toast { position: fixed; right: 1rem; bottom: 1rem; z-index: 90; background: var(--text); color: var(--bg); padding: .7rem 1rem; border-radius: var(--r); box-shadow: var(--shadow); max-width: min(92vw, 420px); animation: rise .2s ease-out; }
.toast.err { background: var(--err); color: #fff; }
@keyframes rise { from { transform: translateY(8px); opacity: 0; } to { transform: none; opacity: 1; } }
@media (prefers-reduced-motion: reduce) { * { animation: none !important; transition: none !important; } }

.auth { min-height: 100dvh; display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); }
.auth-story { padding: clamp(2rem, 6vw, 5rem); display: flex; flex-direction: column; justify-content: space-between; gap: 2rem; border-right: 1px solid var(--line); }
.auth-story .lead { max-width: 46ch; color: var(--muted); font-size: 1.05rem; margin-top: 1rem; }
.auth-facts { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.2rem; max-width: 560px; }
.auth-facts b { display: block; font-family: var(--mono); font-size: 1.05rem; color: var(--text); }
.auth-form { display: grid; place-items: center; padding: 2rem; }
.auth-form form { width: min(100%, 380px); display: grid; gap: .9rem; }
.brand { display: flex; align-items: center; gap: .6rem; font-weight: 650; letter-spacing: -.01em; }
.brand img { width: 28px; height: 28px; }
.seg { display: inline-flex; background: var(--surface-2); border-radius: var(--r); padding: 3px; }
.seg button { border: 0; background: transparent; padding: .35rem .8rem; border-radius: 8px; cursor: pointer; color: var(--muted); font-weight: 550; }
.seg button[aria-pressed='true'] { background: var(--surface); color: var(--text); box-shadow: var(--shadow); }
@media (max-width: 860px) { .auth { grid-template-columns: 1fr; } .auth-story { border-right: 0; border-bottom: 1px solid var(--line); } .auth-facts { grid-template-columns: repeat(2, minmax(0, 1fr)); } }

.shell { display: grid; grid-template-columns: 232px minmax(0, 1fr); min-height: 100dvh; }
.side { border-right: 1px solid var(--line); padding: 1rem .8rem; display: flex; flex-direction: column; gap: 1.2rem; position: sticky; top: 0; height: 100dvh; background: var(--bg); }
.nav { display: grid; gap: 2px; }
.nav button { text-align: left; border: 0; background: transparent; padding: .5rem .7rem; border-radius: 8px; cursor: pointer; color: var(--muted); font-weight: 550; display: flex; justify-content: space-between; align-items: center; }
.nav button:hover { background: var(--surface-2); color: var(--text); }
.nav button[aria-current='page'] { background: var(--surface); color: var(--text); box-shadow: var(--shadow); }
.side-foot { margin-top: auto; display: grid; gap: .5rem; font-size: .84rem; }
.main { padding: clamp(1rem, 2.5vw, 2rem); min-width: 0; }
.head { display: flex; justify-content: space-between; align-items: end; gap: 1rem; flex-wrap: wrap; margin-bottom: 1.4rem; }
.head p { color: var(--muted); max-width: 70ch; margin-top: .35rem; }
.topbar { display: none; }
@media (max-width: 900px) {
  .shell { grid-template-columns: 1fr; }
  .side { display: none; }
  .topbar { display: flex; position: sticky; top: 0; z-index: 20; background: var(--bg); border-bottom: 1px solid var(--line); padding: .6rem 1rem; justify-content: space-between; align-items: center; gap: .6rem; overflow-x: auto; }
  .topbar .nav { display: flex; gap: 2px; }
  .topbar .nav button { white-space: nowrap; }
}

.launch { display: grid; grid-template-columns: minmax(0, 2fr) minmax(0, 1fr); gap: 1.2rem; align-items: start; }
@media (max-width: 1100px) { .launch { grid-template-columns: 1fr; } }
.tasks { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: .6rem; }
.task { display: grid; grid-template-columns: auto 1fr; gap: .2rem .7rem; padding: .75rem .85rem; border: 1px solid var(--line); border-radius: var(--r); background: var(--surface); cursor: pointer; transition: border-color .15s, background .15s; }
.task:hover { border-color: var(--accent); }
.task input { margin-top: .2rem; accent-color: var(--accent); grid-row: span 2; }
.task b { font-weight: 600; font-size: .92rem; }
.task span { font-size: .78rem; color: var(--muted); }
.task:has(input:checked) { background: var(--accent-soft); border-color: var(--accent); }
.modes { display: grid; gap: .5rem; }
.mode { display: grid; grid-template-columns: auto 1fr; gap: .1rem .6rem; border: 1px solid var(--line); border-radius: var(--r); padding: .6rem .75rem; cursor: pointer; }
.mode input { accent-color: var(--accent); grid-row: span 2; margin-top: .25rem; }
.mode:has(input:checked) { border-color: var(--accent); background: var(--accent-soft); }

.canvas-wrap { display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: 1rem; align-items: start; }
@media (max-width: 1200px) { .canvas-wrap { grid-template-columns: 1fr; } }
.viewport { position: relative; background: var(--surface-2); border: 1px solid var(--line); border-radius: var(--r); overflow: hidden; aspect-ratio: 16 / 10; outline: none; }
.viewport.live { cursor: crosshair; }
.viewport.focus { box-shadow: 0 0 0 3px var(--accent-soft); border-color: var(--accent); }
.viewport img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; user-select: none; -webkit-user-drag: none; }
.viewport .empty { position: absolute; inset: 0; display: grid; place-items: center; text-align: center; padding: 2rem; color: var(--muted); }
.overlay { position: absolute; inset: 0; pointer-events: none; }
.box { position: absolute; border: 1.5px solid transparent; border-radius: 3px; }
.overlay.show .box.input { border-color: color-mix(in srgb, var(--accent) 70%, transparent); background: color-mix(in srgb, var(--accent) 8%, transparent); }
.overlay.show .box.button { border-color: color-mix(in srgb, var(--ok) 60%, transparent); }
.box.hot { border-color: var(--accent) !important; background: color-mix(in srgb, var(--accent) 18%, transparent) !important; }
.box.target { border: 2px solid var(--err) !important; }
.hud { position: absolute; left: .6rem; bottom: .6rem; right: .6rem; display: flex; justify-content: space-between; gap: .5rem; pointer-events: none; }
.hud span { background: color-mix(in srgb, var(--bg) 88%, transparent); border: 1px solid var(--line); padding: .15rem .5rem; border-radius: 6px; font-size: .76rem; font-family: var(--mono); max-width: 70%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.controls { display: flex; gap: .4rem; flex-wrap: wrap; margin: .7rem 0; }
.typebar { display: flex; gap: .4rem; }
.typebar .input { font-family: var(--mono); }
.panel { display: grid; gap: .8rem; }
.prompt { border: 1px solid var(--accent); background: var(--accent-soft); border-radius: var(--r); padding: .9rem 1rem; display: grid; gap: .6rem; }
.prompt dl { display: grid; grid-template-columns: auto 1fr auto; gap: .3rem .6rem; margin: 0; align-items: center; }
.prompt dt { color: var(--muted); font-size: .82rem; }
.prompt dd { margin: 0; font-family: var(--mono); font-size: .85rem; word-break: break-word; }
.steps { max-height: 360px; overflow: auto; display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--r); }
.step { display: grid; grid-template-columns: 3.2rem 1fr auto; gap: .5rem; align-items: center; padding: .4rem .6rem; background: var(--surface); font-size: .84rem; }
.step .k { font-family: var(--mono); color: var(--muted); font-size: .76rem; }
.step.cur { background: var(--accent-soft); }
.step.ok .s { color: var(--ok); }
.step.err .s { color: var(--err); }
.step.warn .s { color: var(--warn); }
.log { max-height: 260px; overflow: auto; font-family: var(--mono); font-size: .76rem; display: grid; gap: .15rem; }
.log div { display: grid; grid-template-columns: 4.3rem 1fr; gap: .5rem; }
.log .ok { color: var(--ok); }
.log .warn { color: var(--warn); }
.log .error { color: var(--err); }
.log time { color: var(--muted); }
.progress { height: 6px; background: var(--surface-2); border-radius: 99px; overflow: hidden; }
.progress i { display: block; height: 100%; background: var(--accent); transition: width .3s; }
.gallery { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: .8rem; }
.gallery figure { margin: 0; background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); overflow: hidden; }
.gallery img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; display: block; background: var(--surface-2); }
.gallery figcaption { padding: .6rem .7rem; font-size: .8rem; display: grid; gap: .35rem; }
table.t { width: 100%; border-collapse: collapse; font-size: .86rem; }
table.t th { text-align: left; font-weight: 600; color: var(--muted); font-size: .76rem; padding: .45rem .6rem; border-bottom: 1px solid var(--line); }
table.t td { padding: .45rem .6rem; vertical-align: top; }
table.t tr:nth-child(even) td { background: var(--surface-2); }
.scroll { overflow-x: auto; }
.grid2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.grid3 { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 1rem; }
@media (max-width: 1000px) { .grid2, .grid3 { grid-template-columns: 1fr; } }
.net { width: 100%; height: auto; display: block; }
.net .node rect { fill: var(--surface); stroke: var(--line); stroke-width: 1.2; }
.net .node.crit rect { stroke: var(--accent); stroke-width: 2; fill: var(--accent-soft); }
.net .node text { fill: var(--text); font: 600 12px var(--mono); }
.net .node text.d { fill: var(--muted); font: 400 10px var(--sans); }
.net path { fill: none; stroke: var(--muted); stroke-width: 1.2; }
.net path.crit { stroke: var(--accent); stroke-width: 2; }
.guide ol { padding-left: 1.2rem; display: grid; gap: .9rem; margin: 0; }
.guide pre { background: var(--surface-2); border: 1px solid var(--line); border-radius: var(--r); padding: .8rem; overflow-x: auto; font: .8rem/1.5 var(--mono); margin: .5rem 0 0; }
.kv { display: grid; grid-template-columns: max-content 1fr; gap: .35rem 1rem; font-size: .88rem; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; font-family: var(--mono); }
.center { min-height: 70dvh; display: grid; place-items: center; text-align: center; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }