/* Layout concept: a capture instrument. Library + flows read like a field notebook;
   the world viewer is full-bleed glass with readouts in a mono "survey" face. */
:root {
  /* BILD in phosphor green on black (a Matrix-inspired terminal). Dark only. Status reads by brightness and glyphs,
     not hue: everything is a shade of the same green. */
  --bg-0: #010603;          /* behind 3D views */
  --bg: #020a05;
  --bg-2: #04120a;
  --surface: #061a0d;
  --surface-2: #0a2413;
  --line: #124424;
  --fg: #c4ffd4;            /* pale phosphor: body text */
  --fg-2: #74d996;
  --fg-3: #3f9358;
  --accent: #3dff74;        /* lit phosphor: primary actions, selection */
  --accent-ink: #001806;
  --measure: #a8ffc0;       /* measurements and guides: the brightest, near white */
  --good: #3dff74;
  --warn: #d6ffa8;
  --bad: #f2fff5;
  --glass: rgba(1, 10, 4, .8);
  --glow: 0 0 6px rgba(61, 255, 116, .5), 0 0 18px rgba(61, 255, 116, .16);
  --glow-text: 0 0 6px rgba(61, 255, 116, .55);
  --shadow: 0 10px 40px rgba(0, 0, 0, .6);
  --font-display: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  --font-body: "Figtree", "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-data: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  --r-sm: 4px;
  --r-md: 6px;
  --r-lg: 10px;
  --step--1: .8125rem;
  --step-0: .9375rem;
  --step-1: 1.125rem;
  --step-2: 1.5rem;
  --step-3: 2.25rem;
  --gutter-l: max(16px, env(safe-area-inset-left, 0px));
  --gutter-r: max(16px, env(safe-area-inset-right, 0px));
  color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--fg); font: 400 var(--step-0)/1.5 var(--font-body);
  -webkit-font-smoothing: antialiased; overscroll-behavior: none;
}
body::before { content: ""; position: fixed; inset: 0 0 auto; height: env(safe-area-inset-top, 0px); z-index: 10; background: var(--bg); }
#app { min-height: 100%; display: flex; flex-direction: column; }
[hidden] { display: none !important; }
img { max-width: 100%; }
a { color: inherit; }
h1, h2, h3 { font-family: var(--font-display); font-weight: 700; line-height: 1.1; margin: 0; text-wrap: balance; letter-spacing: -.01em; }
h1 { font-size: var(--step-3); }
h2 { font-size: var(--step-2); }
h3 { font-size: var(--step-1); }
p { margin: 0; }
.muted { color: var(--fg-2); }
.faint { color: var(--fg-3); }
.mono, .data { font-family: var(--font-data); font-variant-numeric: tabular-nums; }
.eyebrow { font: 500 var(--step--1)/1 var(--font-data); letter-spacing: .08em; text-transform: uppercase; color: var(--fg-3); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ---------------------------------------------------------------- top bar */
.topbar {
  position: sticky; top: env(safe-area-inset-top, 0px); z-index: 20; display: flex; align-items: center; justify-content: space-between;
  gap: 12px; padding-block: 10px; padding-left: var(--gutter-l); padding-right: var(--gutter-r);
  background: var(--bg); border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; font: 700 1.15rem/1 var(--font-display); }
.brand-mark { width: 28px; height: 28px; color: var(--fg); }
.topnav { display: flex; align-items: center; gap: 8px; }
body.immersive .topbar { display: none; }

/* ---------------------------------------------------------------- controls */
button { font: inherit; color: inherit; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 44px; padding: 0 18px;
  border-radius: 999px; border: 1px solid var(--line); background: var(--surface); cursor: pointer;
  font-weight: 600; text-decoration: none; transition: background .15s, border-color .15s, transform .1s;
}
.btn:hover { border-color: var(--fg-3); }
.btn:active { transform: scale(.98); }
.btn.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.btn.primary:hover { filter: brightness(1.06); }
.btn.ghost { background: transparent; }
.btn.danger { color: var(--bad); }
.btn[disabled] { opacity: .5; cursor: not-allowed; }
.btn.small { min-height: 34px; padding: 0 12px; font-size: var(--step--1); }
.btn svg, .icon-btn svg, .tool svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.icon-btn {
  width: 44px; height: 44px; display: grid; place-items: center; border-radius: 50%; border: 1px solid var(--line);
  background: var(--surface); cursor: pointer;
}
.chip {
  display: inline-flex; align-items: center; gap: 6px; padding: 4px 10px; border-radius: 999px; border: 1px solid var(--line);
  background: var(--surface); font: 500 var(--step--1)/1.4 var(--font-data); cursor: pointer; white-space: nowrap;
}
.chip.on, .chip[aria-pressed="true"] { border-color: var(--accent); color: var(--accent); }
.chip.lock::after { content: "PRO"; font-size: .65rem; padding: 1px 5px; border-radius: 4px; background: var(--surface-2); color: var(--fg-3); }
.seg { display: inline-flex; padding: 3px; gap: 3px; border-radius: 999px; background: var(--surface-2); border: 1px solid var(--line); flex-wrap: wrap; }
.seg button { border: 0; background: transparent; padding: 7px 14px; border-radius: 999px; cursor: pointer; font-weight: 500; font-size: var(--step--1); }
.seg button[aria-pressed="true"] { background: var(--surface); box-shadow: 0 1px 0 var(--line), 0 0 0 1px var(--line); color: var(--fg); }
label.field { display: grid; gap: 6px; font-weight: 500; }
label.field > span { font-size: var(--step--1); color: var(--fg-2); }
input[type="text"], input[type="email"], input[type="password"], input[type="number"], input[type="url"], textarea, select {
  width: 100%; min-height: 44px; padding: 10px 12px; border-radius: var(--r-sm); border: 1px solid var(--line);
  background: var(--bg-2); color: var(--fg); font: inherit;
}
textarea { min-height: 90px; resize: vertical; }
.toggle { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 10px 0; }
.toggle input { width: 44px; height: 26px; appearance: none; border-radius: 999px; background: var(--line); position: relative; cursor: pointer; flex: none; transition: background .15s; }
.toggle input::after { content: ""; position: absolute; top: 3px; left: 3px; width: 20px; height: 20px; border-radius: 50%; background: var(--fg); transition: transform .15s; }
.toggle input:checked { background: var(--accent); }
.toggle input:checked::after { transform: translateX(18px); background: var(--accent-ink); }

/* ---------------------------------------------------------------- pages */
.page { width: 100%; max-width: 1120px; margin: 0 auto; padding-block: 28px 80px; padding-left: var(--gutter-l); padding-right: var(--gutter-r); display: grid; gap: 28px; }
.page.narrow { max-width: 640px; }
.hero { display: grid; gap: 18px; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); align-items: center; }
.hero h1 { font-size: clamp(2rem, 5vw, 3.2rem); }
.hero h1 em { font-style: normal; color: var(--accent); }
.hero .lede { font-size: var(--step-1); color: var(--fg-2); max-width: 46ch; }
.hero-actions { display: flex; gap: 10px; flex-wrap: wrap; }
.hero-art { aspect-ratio: 2 / 1; max-width: 100%; border-radius: var(--r-lg); overflow: hidden; position: relative; border: 1px solid var(--line); background: var(--bg-2); }
.hero-art canvas, .hero-art img { width: 100%; height: 100%; display: block; object-fit: cover; }
.hero-art .art-readout { position: absolute; left: 12px; bottom: 10px; font: 500 .72rem/1.4 var(--font-data); color: var(--fg); text-shadow: 0 1px 2px #000; letter-spacing: .04em; }
@media (max-width: 760px) { .hero { grid-template-columns: 1fr; } }

.section-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.grid { display: grid; gap: 14px; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
.card {
  display: grid; grid-template-rows: auto 1fr; border-radius: var(--r-md); overflow: hidden; background: var(--surface);
  border: 1px solid var(--line); text-decoration: none; cursor: pointer; transition: border-color .15s, transform .15s; min-width: 0;
}
.card:hover { border-color: var(--fg-3); transform: translateY(-2px); }
.card .thumb { aspect-ratio: 2 / 1; background: var(--bg-2) center / cover no-repeat; position: relative; }
.card .thumb .tag { position: absolute; top: 8px; left: 8px; }
.card .body { padding: 12px 14px 14px; display: grid; gap: 4px; align-content: start; }
.card .body h3 { font-size: 1rem; overflow-wrap: anywhere; }
.card .meta { font: 400 var(--step--1)/1.4 var(--font-data); color: var(--fg-3); display: flex; gap: 10px; flex-wrap: wrap; }
.tag { display: inline-flex; align-items: center; gap: 5px; padding: 3px 8px; border-radius: 6px; font: 500 .7rem/1.3 var(--font-data); letter-spacing: .05em; text-transform: uppercase; background: var(--glass); color: var(--fg); backdrop-filter: blur(6px); }
.tag.hq { color: var(--accent); }
.tag .dot { width: 7px; height: 7px; border-radius: 50%; background: currentColor; }
.tag.running .dot { animation: pulse 1.2s infinite; }
@keyframes pulse { 50% { opacity: .3; } }
.empty { padding: 28px; border: 1px dashed var(--line); border-radius: var(--r-md); color: var(--fg-2); display: grid; gap: 8px; justify-items: start; }

.tips { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.tip { padding: 16px; border-radius: var(--r-md); background: var(--bg-2); border: 1px solid var(--line); display: grid; gap: 6px; align-content: start; }
.tip .num { font: 500 var(--step--1)/1 var(--font-data); color: var(--accent); }

/* drop zone / import */
.drop {
  border: 1.5px dashed var(--line); border-radius: var(--r-lg); padding: 36px 20px; display: grid; gap: 12px; justify-items: center;
  text-align: center; background: var(--bg-2); cursor: pointer; transition: border-color .15s, background .15s;
}
.drop.over { border-color: var(--accent); background: var(--surface); }
.drop svg { width: 44px; height: 44px; stroke: var(--accent); fill: none; stroke-width: 1.5; }
.formats { display: flex; gap: 6px; flex-wrap: wrap; justify-content: center; }
.panel { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r-md); padding: 18px; display: grid; gap: 14px; min-width: 0; }
.row { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.row.spread { justify-content: space-between; }
.stack { display: grid; gap: 12px; }
.filmstrip { display: flex; gap: 6px; overflow-x: auto; padding-bottom: 6px; scrollbar-width: thin; }
.filmstrip button { flex: none; width: 112px; aspect-ratio: 2 / 1; border-radius: 8px; border: 2px solid transparent; padding: 0; overflow: hidden; background: var(--bg-2) center / cover; cursor: pointer; position: relative; }
.filmstrip button[aria-pressed="true"] { border-color: var(--accent); }
.filmstrip button .sharp { position: absolute; left: 0; right: 0; bottom: 0; height: 4px; background: var(--good); transform-origin: left; }
.kv { display: grid; grid-template-columns: auto 1fr; gap: 6px 16px; font-size: var(--step--1); }
.kv dt { color: var(--fg-3); font-family: var(--font-data); }
.kv dd { margin: 0; font-family: var(--font-data); font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }

/* progress */
.steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 2px; }
.steps li { display: grid; grid-template-columns: 22px 1fr auto; gap: 12px; align-items: center; padding: 9px 0; color: var(--fg-3); border-bottom: 1px solid var(--line); }
.steps li .ic { width: 14px; height: 14px; border-radius: 50%; border: 2px solid currentColor; justify-self: center; }
.steps li.active { color: var(--fg); }
.steps li.active .ic { border-color: var(--accent); border-top-color: transparent; animation: spin .9s linear infinite; }
.steps li.done { color: var(--fg-2); }
.steps li.done .ic { background: var(--good); border-color: var(--good); }
.steps li .t { font: 400 var(--step--1)/1 var(--font-data); }
@keyframes spin { to { transform: rotate(360deg); } }
.bar { height: 8px; border-radius: 999px; background: var(--surface-2); overflow: hidden; }
.bar > i { display: block; height: 100%; width: 0; background: var(--accent); transition: width .4s; }
.bignum { font: 500 clamp(2.4rem, 8vw, 4rem)/1 var(--font-data); letter-spacing: -.03em; font-variant-numeric: tabular-nums; }

/* plans */
.plans { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }
.plan { padding: 18px; border-radius: var(--r-md); border: 1px solid var(--line); background: var(--surface); display: grid; gap: 10px; align-content: start; }
.plan.current { border-color: var(--accent); }
.plan .price { font: 500 1.6rem/1 var(--font-data); }
.plan ul { margin: 0; padding-left: 18px; color: var(--fg-2); font-size: var(--step--1); display: grid; gap: 4px; }

/* ---------------------------------------------------------------- viewer */
.viewer { position: fixed; inset: 0; background: var(--bg-0); overflow: hidden; touch-action: none; user-select: none; -webkit-user-select: none; }
.viewer canvas.gl { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
.viewer .overlay { position: absolute; inset: 0; pointer-events: none; }
.vbar {
  position: absolute; left: 0; right: 0; display: flex; align-items: center; gap: 8px; pointer-events: none;
  padding-left: calc(var(--gutter-l) - 4px); padding-right: calc(var(--gutter-r) - 4px);
}
.vbar > * { pointer-events: auto; }
.vbar.top { top: 0; padding-top: calc(env(safe-area-inset-top, 0px) + 10px); justify-content: space-between; }
.vbar.bottom { bottom: 0; padding-bottom: calc(env(safe-area-inset-bottom, 0px) + 12px); justify-content: center; }
.vtitle { display: flex; align-items: center; gap: 10px; min-width: 0; }
.vtitle h2 { font-size: 1rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; color: var(--fg); text-shadow: 0 1px 3px rgba(0,0,0,.6); }
.glass { background: var(--glass); backdrop-filter: blur(12px) saturate(1.2); -webkit-backdrop-filter: blur(12px) saturate(1.2); border: 1px solid var(--line); }
.viewer .icon-btn { background: var(--glass); backdrop-filter: blur(12px); }
.toolbar { display: flex; gap: 4px; padding: 5px; border-radius: 999px; overflow-x: auto; max-width: 100%; scrollbar-width: none; }
.tool { display: grid; justify-items: center; gap: 2px; min-width: 58px; padding: 6px 8px; border: 0; border-radius: 999px; background: transparent; cursor: pointer; color: var(--fg-2); font: 500 .68rem/1.1 var(--font-body); }
.tool[aria-pressed="true"] { background: var(--surface-2); color: var(--accent); }
.tool:hover { color: var(--fg); }
.modes .tool { color: var(--fg); }
.modes { position: absolute; top: calc(env(safe-area-inset-top, 0px) + 64px); left: var(--gutter-l); display: grid; gap: 6px; pointer-events: auto; }
.readout { position: absolute; right: var(--gutter-r); top: calc(env(safe-area-inset-top, 0px) + 66px); padding: 8px 10px; border-radius: 10px; font: 400 .72rem/1.5 var(--font-data); color: var(--fg-2); pointer-events: none; font-variant-numeric: tabular-nums; }
.loading { position: absolute; inset: 0; display: grid; place-content: center; gap: 12px; justify-items: center; color: var(--fg); background: var(--bg-0); z-index: 3; text-align: center; padding: 20px; }
.loading .bar { width: min(280px, 70vw); }

.joystick { position: absolute; left: calc(var(--gutter-l) + 8px); bottom: calc(env(safe-area-inset-bottom, 0px) + 96px); width: 120px; height: 120px; border-radius: 50%; pointer-events: auto; touch-action: none; }
.joystick i { position: absolute; left: 50%; top: 50%; width: 48px; height: 48px; margin: -24px 0 0 -24px; border-radius: 50%; background: var(--fg); opacity: .8; }
.updown { position: absolute; right: calc(var(--gutter-r) + 8px); bottom: calc(env(safe-area-inset-bottom, 0px) + 110px); display: grid; gap: 8px; pointer-events: auto; }

.pin { position: absolute; transform: translate(-50%, -100%); pointer-events: auto; cursor: pointer; display: grid; justify-items: center; }
.pin .head { width: 28px; height: 28px; border-radius: 50% 50% 50% 0; transform: rotate(-45deg); display: grid; place-items: center; box-shadow: 0 4px 10px rgba(0,0,0,.4); border: 2px solid var(--fg); }
.pin .head b { transform: rotate(45deg); font: 700 .75rem/1 var(--font-data); color: var(--accent-ink); }
.pin .label { margin-top: 4px; padding: 2px 7px; border-radius: 6px; background: var(--glass); font: 500 .72rem/1.3 var(--font-body); white-space: nowrap; color: var(--fg); }
.mlabel { position: absolute; transform: translate(-50%, -50%); padding: 3px 7px; border-radius: 6px; background: rgba(1, 8, 3, .82); color: var(--measure); font: 500 .78rem/1.2 var(--font-data); white-space: nowrap; pointer-events: none; border: 1px solid var(--measure); font-variant-numeric: tabular-nums; }
.olabel { position: absolute; transform: translate(-50%, -100%); padding: 3px 8px; border-radius: 6px; background: var(--accent); color: var(--accent-ink); font: 600 .72rem/1.3 var(--font-body); white-space: nowrap; pointer-events: none; }
.crosshair { position: absolute; left: 50%; top: 50%; width: 18px; height: 18px; margin: -9px; pointer-events: none; }
.crosshair::before, .crosshair::after { content: ""; position: absolute; background: var(--accent); }
.crosshair::before { left: 8px; top: 0; width: 2px; height: 18px; }
.crosshair::after { top: 8px; left: 0; height: 2px; width: 18px; }
.rec { position: absolute; top: calc(env(safe-area-inset-top, 0px) + 14px); left: 50%; transform: translateX(-50%); padding: 6px 12px; border-radius: 999px; background: var(--bad); color: var(--accent-ink); font: 600 .8rem/1 var(--font-data); z-index: 4; box-shadow: var(--glow); }
.hint { position: absolute; left: 50%; bottom: calc(env(safe-area-inset-bottom, 0px) + 86px); transform: translateX(-50%); padding: 8px 14px; border-radius: 999px; font-size: var(--step--1); color: var(--fg); pointer-events: none; text-align: center; max-width: calc(100% - 32px); }

/* side panel (desktop) / bottom sheet (phone) */
.vpanel {
  position: absolute; right: calc(var(--gutter-r) - 4px); top: calc(env(safe-area-inset-top, 0px) + 64px); bottom: calc(env(safe-area-inset-bottom, 0px) + 82px);
  width: min(360px, calc(100% - 24px)); border-radius: var(--r-md); display: flex; flex-direction: column; pointer-events: auto; overflow: hidden; z-index: 2;
}
.vpanel header { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 12px 12px 10px 16px; border-bottom: 1px solid var(--line); }
.vpanel header h3 { font-size: 1rem; }
.vpanel .content { padding: 14px 16px 18px; overflow-y: auto; display: grid; gap: 14px; align-content: start; }
@media (max-width: 700px) {
  .vpanel { left: 8px; right: 8px; width: auto; top: auto; max-height: 52vh; bottom: calc(env(safe-area-inset-bottom, 0px) + 80px); }
  .readout { display: none; }
}
.list { display: grid; gap: 6px; }
.item { text-align: left; font: inherit; color: inherit; width: 100%; display: grid; grid-template-columns: auto 1fr auto; gap: 10px; align-items: center; padding: 9px 10px; border-radius: 10px; background: var(--surface-2); border: 1px solid transparent; cursor: pointer; min-width: 0; }
.item.sel { border-color: var(--accent); }
.item .sw { width: 12px; height: 12px; border-radius: 3px; }
.item .nm { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.item .sub { font: 400 .72rem/1.3 var(--font-data); color: var(--fg-3); }
.item.off { opacity: .5; }

/* sheets & toasts */
.sheet-backdrop { position: fixed; inset: 0; background: rgba(0, 0, 0, .5); z-index: 40; display: grid; align-items: end; justify-items: center; animation: fade .15s; }
.sheet {
  width: min(560px, 100%); max-height: 88vh; overflow-y: auto; background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--r-lg) var(--r-lg) 0 0; padding: 20px var(--gutter-r) calc(env(safe-area-inset-bottom, 0px) + 20px) var(--gutter-l); display: grid; gap: 16px;
  box-shadow: var(--shadow); animation: up .2s ease-out;
}
@media (min-width: 701px) { .sheet-backdrop { align-items: center; } .sheet { border-radius: var(--r-lg); } }
.sheet header { display: flex; justify-content: space-between; align-items: start; gap: 12px; }
.sheet .actions { display: flex; gap: 10px; justify-content: flex-end; flex-wrap: wrap; }
@keyframes up { from { transform: translateY(30px); opacity: 0; } }
@keyframes fade { from { opacity: 0; } }
#toasts { position: fixed; left: 50%; transform: translateX(-50%); bottom: calc(env(safe-area-inset-bottom, 0px) + 20px); z-index: 60; display: grid; gap: 8px; width: min(440px, calc(100% - 32px)); pointer-events: none; }
.toast { padding: 12px 16px; border-radius: 12px; background: var(--surface-2); border: 1px solid var(--line); box-shadow: var(--shadow); animation: up .2s; pointer-events: auto; }
.toast.bad { border-color: var(--bad); }
.toast.good { border-color: var(--good); }
.export-group { display: grid; gap: 8px; }
.export-row { display: grid; grid-template-columns: 1fr auto; gap: 10px; align-items: center; padding: 10px 12px; border-radius: 10px; background: var(--surface-2); }
.export-row .fmt { font: 500 .72rem/1 var(--font-data); color: var(--fg-3); letter-spacing: .04em; }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation: none !important; transition: none !important; } }

/* ---- house editor */
.vpanel.left { left: calc(var(--gutter-l) - 4px); right: auto; }
.props { display: grid; grid-template-columns: repeat(auto-fit, minmax(96px, 1fr)); gap: 6px; }
.props label { display: grid; gap: 2px; font-size: .75rem; color: var(--fg-2); min-width: 0; }
.props input, .props select, .vpanel input[type="text"], .vpanel select { width: 100%; font: inherit; font-size: .875rem; color: var(--fg); background: var(--surface-2); border: 1px solid var(--line); border-radius: 8px; padding: 6px 8px; }
.props input:focus, .vpanel input[type="text"]:focus, .vpanel select:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
.vpanel .toggle { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
@media (max-width: 700px) { .vpanel.left { left: 8px; right: 8px; } }

/* ---- design (CAD) editor */
.design .readout { top: calc(env(safe-area-inset-top, 0px) + 64px); }
.design .vpanel.left .content { gap: 12px; }
.design .save-state { font-size: .7rem; color: var(--fg-3); white-space: nowrap; }
.design .save-state[data-state="Not saved"] { color: var(--bad); }
.design .vbar.top > .row { flex-wrap: nowrap; }
.unit-sel { width: auto; flex: none; font: 500 .8rem var(--font-data); color: var(--fg); background: var(--glass); border: 1px solid var(--line); border-radius: 999px; padding: 7px 8px; }
.design-tools { max-width: min(100%, 900px); }
.design .tree .item { grid-template-columns: 26px 1fr auto; }
.design .ficon { width: 22px; height: 22px; color: var(--fg-2); }
.design .ficon svg { width: 22px; height: 22px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.design .ficon.error { color: var(--bad); }
.design .ficon.warn { color: var(--warn); }
.design .tag.bad { background: var(--bad); color: var(--accent-ink); }
.design .tag.warn { background: var(--warn); color: var(--accent-ink); }
.design .tip-line { font-size: .7rem; color: var(--accent); border-top: 1px dashed var(--accent); padding-top: 4px; }
.design .note { margin: 0; padding: 8px 10px; border-radius: 8px; background: var(--surface-2); font-size: .8rem; }
.design .note.error { border-left: 3px solid var(--bad); }
.design .note.warn { border-left: 3px solid var(--warn); }
.design input.bad { outline: 2px solid var(--bad); }
.design .row.wrap { flex-wrap: wrap; }
.danger-text { color: var(--bad) !important; }
.empty.small { padding: 12px; font-size: .85rem; }
.view-btns { position: absolute; right: var(--gutter-r); bottom: calc(env(safe-area-inset-bottom, 0px) + 84px); display: grid; gap: 6px; pointer-events: auto; }
.view-btns .btn { min-width: 64px; }
.edge-bar { position: absolute; left: 50%; transform: translateX(-50%); top: calc(env(safe-area-inset-top, 0px) + 64px); display: flex; gap: 10px; align-items: center; padding: 8px 10px 8px 16px; border-radius: 999px; pointer-events: auto; font-size: var(--step--1); z-index: 3; max-width: calc(100% - 24px); }
.edge-bar[hidden] { display: none; }
.plane-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.plane-grid .btn { display: grid; gap: 2px; justify-items: center; padding: 14px 8px; }
.plane-grid .btn span { font-size: .75rem; color: var(--fg-2); font-weight: 400; }
.design.sketching .overlay > *:not(.sketcher) { visibility: hidden; }
.design.sketching canvas.gl { opacity: .25; }
@media (max-width: 700px) {
  .design .vtitle { min-width: 0; flex: 1 1 auto; gap: 6px; }
  .design .vtitle h2 { min-width: 0; }
  .design .save-state { display: none; }
  .design .vbar.top > .row { gap: 4px; }
  .view-btns { bottom: auto; top: calc(env(safe-area-inset-top, 0px) + 64px); grid-auto-flow: column; right: 8px; }
  .view-btns .btn { min-width: 0; padding: 6px 9px; }
  .design .vpanel.left { max-height: 46vh; }
}

/* sketcher */
.sketcher { position: absolute; inset: 0; z-index: 5; pointer-events: auto; }
.sk-board { position: absolute; inset: 0; width: 100%; height: 100%; touch-action: none; cursor: crosshair; background: rgba(1, 8, 3, .86); }
.sk-board line, .sk-board circle, .sk-board path, .sk-board rect { vector-effect: non-scaling-stroke; }
.sk-grid line { stroke: rgba(61, 255, 116, .06); stroke-width: 1; }
.sk-grid line.maj { stroke: rgba(61, 255, 116, .14); }
.sk-axis { stroke-width: 1.2; }
.sk-axis.x { stroke: rgba(168, 255, 192, .7); }
.sk-axis.y { stroke: rgba(168, 255, 192, .7); stroke-dasharray: 8 4; }
.sk-ref { stroke: rgba(116, 217, 150, .45); stroke-width: 1; stroke-dasharray: 4 3; }
.sk-e { stroke: var(--fg-2); stroke-width: 2; fill: none; }
.sk-e.full { stroke: var(--fg); filter: drop-shadow(0 0 2px rgba(61, 255, 116, .6)); }  /* fully constrained: lit */
.sk-e.constr { stroke: var(--fg-3); stroke-dasharray: 6 4; stroke-width: 1.4; }
.sk-e.sel { stroke: var(--accent); stroke-width: 3; }
.sk-p { fill: var(--fg-2); }
.sk-p.full { fill: var(--fg); }
.sk-p.sel { fill: var(--accent); }
.sk-problem { fill: none; stroke: var(--bad); stroke-width: 2; }
.sk-cursor { fill: none; stroke: var(--measure); stroke-width: 1.5; }
.sk-cursor.snap { stroke: var(--accent); stroke-width: 2.5; }
.sk-draft { stroke: var(--measure); stroke-width: 1.5; stroke-dasharray: 5 4; fill: none; }
.sk-tip { fill: var(--measure); font: 500 12px var(--font-data); paint-order: stroke; stroke: rgba(1, 8, 3, .9); stroke-width: 3px; }
.sk-glyph { fill: var(--accent); font: 700 11px var(--font-data); cursor: pointer; paint-order: stroke; stroke: rgba(1, 8, 3, .9); stroke-width: 3px; }
.sk-glyph.sel { fill: var(--measure); }
.sk-labels { position: absolute; inset: 0; pointer-events: none; }
.sk-dim { position: absolute; transform: translate(-50%, -50%); pointer-events: auto; padding: 3px 8px; border-radius: 6px; border: 1px solid var(--measure); background: rgba(1, 8, 3, .9); color: var(--measure); font: 500 .78rem/1.2 var(--font-data); cursor: pointer; white-space: nowrap; font-variant-numeric: tabular-nums; }
.sk-dim.sel { border-color: var(--accent); color: var(--accent); }
.sk-input { position: absolute; transform: translate(-50%, -50%); pointer-events: auto; width: 120px; padding: 6px 8px; border-radius: 8px; border: 2px solid var(--accent); background: var(--surface); color: var(--fg); font: 500 .9rem var(--font-data); z-index: 2; }
.sk-status { position: absolute; left: 50%; transform: translateX(-50%); top: calc(env(safe-area-inset-top, 0px) + 62px); padding: 6px 14px; border-radius: 14px; font-size: .75rem; color: var(--fg-2); white-space: nowrap; text-align: center; line-height: 1.5; pointer-events: none; max-width: calc(100% - 24px); overflow: hidden; text-overflow: ellipsis; }
.sk-status b.ok { color: var(--good); }
.sk-status b.bad { color: var(--bad); }
.sketcher .vbar.top { z-index: 2; }
.sk-bottom { flex-direction: column; gap: 8px; }
.sk-cons[hidden] { display: none; }
.sketcher .tool svg, .design-tools .tool svg { width: 22px; height: 22px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
/* toasts float above an editor's bottom toolbar instead of covering it */
body.immersive #toasts { bottom: calc(env(safe-area-inset-bottom, 0px) + 92px); }
.sk-ref.scan { stroke: rgba(168, 255, 192, .4); stroke-dasharray: none; stroke-width: 1.2; }
.note-box { margin: 0; padding: 8px 10px; border-radius: 8px; background: var(--surface-2); border-left: 3px solid var(--accent); font-size: .82rem; gap: 8px; }
.note-box.warn { border-left-color: var(--warn); }
.pending-box { padding: 10px 12px; border-radius: 10px; background: var(--surface-2); border: 1px solid color-mix(in srgb, var(--accent) 55%, transparent); gap: 8px; }
.pending-box p { margin: 0; }
.sheet.wide { max-width: min(1100px, 96vw); width: 100%; }
.drawing-preview { background: #fff; border-radius: 8px; overflow: auto; max-height: 58vh; }
.drawing-preview svg { display: block; width: 100%; height: auto; }
.fem-legend { position: absolute; right: 16px; bottom: 96px; width: 200px; padding: 10px 12px; border-radius: 10px; display: grid; gap: 6px; font-size: .8rem; pointer-events: none; }
.fem-legend .bar { height: 10px; border-radius: 5px; background: linear-gradient(90deg, #04230e, #0d6b2c, #2bd65e, #9dffb6, #f2fff5); }
.sim-panel .content { gap: 12px; }
.macro { width: 100%; min-height: 280px; font-size: .82rem; line-height: 1.45; tab-size: 4; resize: vertical; }
.macro-out { max-height: 160px; overflow: auto; margin: 0; padding: 8px 10px; border-radius: 8px; background: var(--surface-2); font-size: .78rem; white-space: pre-wrap; }

/* ---------------------------------------------------------------- terminal layer (the Matrix-inspired theme)
   Mono for headings, labels, numbers and buttons; the sans stays for reading. Square-ish corners, phosphor glow on
   what is lit or touched, a blinking cursor after page titles. Motion goes when the device asks for less. */
h1, h2, h3 { font-family: var(--font-display); font-weight: 500; letter-spacing: -.02em; text-shadow: var(--glow-text); }
h1 { font-size: clamp(1.8rem, 4.4vw, 2.6rem); }
.btn, .chip, .seg button, .tool, .tag, label.field > span, .props label > span, .eyebrow, .vpanel header h3 { font-family: var(--font-data); }
.btn { border-radius: var(--r-sm); letter-spacing: .02em; font-weight: 500; }
.btn.primary { box-shadow: var(--glow); text-shadow: none; }
.btn:hover, .icon-btn:hover, .chip:hover, .card:hover, .tool:hover { border-color: var(--accent); box-shadow: var(--glow); }
.btn.primary:hover { filter: brightness(1.12); }
.icon-btn, .seg, .seg button, .chip, .toolbar, .tool, .tag { border-radius: var(--r-sm); }
.icon-btn { border-radius: var(--r-sm); }
:focus-visible { outline: 1px solid var(--accent); outline-offset: 2px; box-shadow: var(--glow); }
input:focus, textarea:focus, select:focus { border-color: var(--accent); box-shadow: var(--glow); outline: none; }
input, textarea, select { caret-color: var(--accent); }
.card { border-radius: var(--r-md); }
.card .thumb { filter: saturate(.85); }
.tool[aria-pressed="true"] { color: var(--accent); text-shadow: var(--glow-text); box-shadow: inset 0 0 0 1px var(--line); }
.hero h1 em { color: var(--accent); text-shadow: var(--glow); }
.brand { font-family: var(--font-data); font-weight: 500; letter-spacing: .14em; color: var(--accent); text-shadow: var(--glow-text); }
.brand-mark { color: var(--accent); filter: drop-shadow(0 0 4px rgba(61, 255, 116, .6)); }
.bar > i { box-shadow: var(--glow); }
::selection { background: var(--accent); color: var(--accent-ink); }
* { scrollbar-color: var(--line) transparent; }

/* a cursor after page titles: "> TITLE_" */
.cursor::after { content: "_"; margin-left: .08em; color: var(--accent); animation: blink 1.06s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }
.prompt::before { content: "> "; color: var(--fg-3); }

/* text that types on (js adds .typing and sets --n = characters) */
.typing { display: inline-block; overflow: hidden; white-space: nowrap; vertical-align: bottom; max-width: 0;
  animation: type calc(var(--n, 20) * 28ms) steps(var(--n, 20), end) forwards; }
@keyframes type { to { max-width: calc(var(--n, 20) * 1ch + 1ch); } }

/* code rain (js/core/matrix.js): behind loading and empty screens, never behind work */
.rain { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; z-index: 0; opacity: .55; }
.loading > :not(.rain), .empty > :not(.rain) { position: relative; z-index: 1; }
.empty { position: relative; overflow: hidden; }
.loading { background: var(--bg-0); color: var(--fg); }
.loading h3, .loading .eyebrow { color: var(--accent); }

/* launch splash: the mark resolves out of the rain (under a second) */
.splash { position: fixed; inset: 0; z-index: 100; display: grid; place-items: center; background: var(--bg-0); transition: opacity .25s; }
.splash.out { opacity: 0; pointer-events: none; }
.splash .mark { position: relative; z-index: 1; display: grid; justify-items: center; gap: 10px; font: 500 1.6rem/1 var(--font-data); letter-spacing: .3em; color: var(--accent); text-shadow: var(--glow); animation: resolve .6s ease-out both; }
.splash .mark svg { width: 64px; height: 64px; filter: drop-shadow(0 0 8px rgba(61, 255, 116, .7)); }
@keyframes resolve { from { opacity: 0; filter: blur(6px); letter-spacing: .8em; } to { opacity: 1; filter: none; } }

/* toasts read like terminal lines */
#toasts > * { font-family: var(--font-data); font-size: .82rem; border-radius: var(--r-sm); }

@media (prefers-reduced-motion: reduce) {
  .cursor::after, .tag.running .dot, .steps li.active .ic { animation: none; }
  .typing { animation: none; max-width: none; }
  .splash { display: none; }
  .rain { display: none; }
  .btn:active { transform: none; }
}
.sim-panel .content { overflow-x: hidden; }
.sim-panel .props { grid-template-columns: repeat(auto-fit, minmax(96px, 1fr)); }
.sim-panel input[type="range"] { width: 100%; }