/* Layout: the site's navy masthead over a tool shell — stage rail on the left, working stage on the right. Drawings stay black-on-white paper in both themes. */
:root {
  --navy: #1F2549; --navy-2: #2A3160; --gold: #8C806A; --gold-soft: #C2B697;
  --bg: #F6F4F0; --surface: #FFFFFF; --ink: #1A1E38; --muted: #5E6178; --line: #E2DED6; --chip: #EEEAE2;
  --accent: #1F2549; --accent-ink: #FFFFFF; --accent-soft: #ECE8DF; --eyebrow: #8C806A;
  --ok: #2E7D4F; --err: #B3261E; --paper: #FFFFFF; --sheet-bg: #DCD8D0; --viewport: #DFE6EA;
  --display: "Montserrat", system-ui, sans-serif;
  --body: "IBM Plex Sans", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --r: 14px; --r-s: 9px;
  --shadow: 0 1px 2px rgba(20, 24, 50, .06), 0 12px 32px -16px rgba(20, 24, 50, .22);
  --gut-l: max(16px, env(safe-area-inset-left, 0px)); --gut-r: max(16px, env(safe-area-inset-right, 0px));
  color-scheme: light;
  padding-top: env(safe-area-inset-top, 0px); padding-bottom: env(safe-area-inset-bottom, 0px);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0F1226; --surface: #181C38; --ink: #ECEAF2; --muted: #A3A6BE; --line: #2C3155; --chip: #20254A;
    --accent: #C2B697; --accent-ink: #141831; --accent-soft: #2A2F52; --eyebrow: #C2B697;
    --ok: #5CC08A; --err: #F08A80; --sheet-bg: #22264A; --viewport: #1C2140;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 12px 32px -16px rgba(0, 0, 0, .6); color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0F1226; --surface: #181C38; --ink: #ECEAF2; --muted: #A3A6BE; --line: #2C3155; --chip: #20254A;
  --accent: #C2B697; --accent-ink: #141831; --accent-soft: #2A2F52; --eyebrow: #C2B697;
  --ok: #5CC08A; --err: #F08A80; --sheet-bg: #22264A; --viewport: #1C2140;
  --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 12px 32px -16px rgba(0, 0, 0, .6); color-scheme: dark;
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body { font: 400 15px/1.55 var(--body); background: var(--bg); color: var(--ink); min-height: 100vh; -webkit-font-smoothing: antialiased; }
body::before { content: ""; position: fixed; inset: 0 0 auto; height: env(safe-area-inset-top, 0px); z-index: 10; background: var(--navy); }
[hidden] { display: none !important; }
h1, h2, h3 { font-family: var(--display); margin: 0; text-wrap: balance; }
h1 { font-size: clamp(1.45rem, 3vw, 1.9rem); font-weight: 800; letter-spacing: -.025em; line-height: 1.12; }
h2 { font-size: 1.25rem; font-weight: 800; letter-spacing: -.015em; }
h3 { font: 700 .72rem var(--body); text-transform: uppercase; letter-spacing: .12em; color: var(--muted); margin: 0 0 12px; }
p { margin: 0; }
a { color: var(--accent); }
.eyebrow { font: 700 .72rem var(--body); letter-spacing: .14em; text-transform: uppercase; color: var(--eyebrow); margin-bottom: 8px; }
.muted { color: var(--muted); }
.small { font-size: 12.5px; }
.num { font-family: var(--mono); font-variant-numeric: tabular-nums; }
.err { color: var(--err); font-size: 12.5px; }
:focus-visible { outline: 2px solid var(--gold); outline-offset: 2px; }

/* masthead (matches the main site) */
.top { position: sticky; top: env(safe-area-inset-top, 0px); z-index: 9; background: var(--navy); color: #fff; }
.top-inner { display: flex; align-items: center; gap: 18px; min-height: 60px; padding-block: 8px; padding-left: var(--gut-l); padding-right: var(--gut-r); }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; color: #fff; min-width: 0; }
.brand img { height: 32px; width: auto; display: block; }
.brand .logo { width: 30px; height: 30px; color: var(--gold-soft); }
.brand-tag { font: 600 .7rem var(--body); letter-spacing: .16em; text-transform: uppercase; color: var(--gold-soft); border-inline-start: 1px solid rgba(255, 255, 255, .25); padding-inline-start: 12px; white-space: nowrap; }
.sitenav { display: flex; gap: 20px; font-size: .88rem; }
.sitenav a { color: rgba(255, 255, 255, .8); text-decoration: none; }
.sitenav a:hover { color: #fff; }
.project-pill { margin-inline-start: auto; font-size: .82rem; color: rgba(255, 255, 255, .65); max-width: 30vw; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.project-pill b { color: #fff; font-weight: 600; }
.top-actions { display: flex; gap: 8px; }

/* layout */
.shell { display: grid; grid-template-columns: 240px minmax(0, 1fr); min-height: calc(100vh - 60px); }
.steps { border-inline-end: 1px solid var(--line); padding: 18px 12px; background: var(--surface); }
.steps ol { list-style: none; margin: 0; padding: 0; display: grid; gap: 2px; }
.steps li { display: flex; gap: 10px; align-items: flex-start; padding: 10px; border-radius: var(--r-s); cursor: pointer; }
.steps li:hover { background: var(--bg); }
.steps li.active { background: var(--accent-soft); }
.steps li b { display: block; font: 600 .92rem var(--display); letter-spacing: -.01em; }
.steps li small { color: var(--muted); font-size: 12px; }
.dot { width: 12px; height: 12px; border-radius: 50%; border: 2px solid var(--line); margin-top: 5px; flex: none; }
.steps li.done .dot { background: var(--ok); border-color: var(--ok); }
.steps li.active .dot { border-color: var(--gold); }
.pipeline-summary { margin-top: 18px; padding: 14px 10px 0; border-top: 1px solid var(--line); font-size: 12.5px; color: var(--muted); display: grid; gap: 4px; }
.pipeline-summary b { color: var(--ink); font-family: var(--mono); font-weight: 500; }
main { padding-block: 28px 48px; padding-left: max(24px, var(--gut-l)); padding-right: max(24px, var(--gut-r)); min-width: 0; }
.stage-head { margin-bottom: 20px; display: grid; gap: 6px; }
.stage-head p { color: var(--muted); max-width: 68ch; }

.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); padding: 20px; box-shadow: var(--shadow); min-width: 0; }
.card + .card { margin-top: 16px; }
.grid-2 { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: 16px; align-items: start; }
.grid-review { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr); gap: 16px; align-items: start; }
.grid-2 .card + .card, .grid-review .card + .card { margin-top: 0; }
.row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; margin-top: 14px; }
.row.flush { margin-top: 0; }
.row.end { justify-content: flex-end; }
.row.between { justify-content: space-between; }
.sep { width: 1px; height: 22px; background: var(--line); margin: 0 4px; }

/* forms */
.form { display: grid; gap: 12px; margin-bottom: 18px; }
.form .form { margin-bottom: 0; }
.form.cols-2, .cols-2 { grid-template-columns: 1fr 1fr; }
.span-2 { grid-column: span 2; }
label { display: grid; gap: 5px; font-size: 12.5px; font-weight: 500; color: var(--muted); }
label small { font-weight: 400; }
input, select, textarea { font: inherit; font-size: 14px; color: var(--ink); background: var(--bg); border: 1px solid var(--line); border-radius: var(--r-s); padding: 9px 11px; width: 100%; }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--gold); outline-offset: -1px; }
textarea { font-family: var(--mono); font-size: 12px; resize: vertical; }
.check { display: inline-flex; align-items: center; gap: 7px; font-size: 13.5px; color: var(--ink); font-weight: 400; }
.check input { width: auto; accent-color: var(--gold); }

button, .button { font: 600 .9rem var(--body); border-radius: var(--r-s); padding: 10px 16px; border: 1px solid transparent; cursor: pointer; display: inline-flex; align-items: center; justify-content: center; gap: 6px; text-decoration: none; white-space: nowrap; }
.primary { background: var(--accent); color: var(--accent-ink); }
.primary:hover { filter: brightness(1.1); }
.primary:disabled { opacity: .5; cursor: progress; }
.ghost { background: transparent; border-color: var(--line); color: var(--ink); }
.ghost:hover { background: var(--bg); }
.ghost.onnavy { color: #fff; border-color: rgba(255, 255, 255, .3); padding: 7px 12px; font-size: .82rem; }
.ghost.onnavy:hover { background: rgba(255, 255, 255, .1); }
.sm { padding: 6px 11px; font-size: 13px; }
@media (prefers-reduced-motion: no-preference) {
  button, .button { transition: transform .12s ease, filter .15s ease, background-color .15s ease; }
  button:active, .button:active { transform: scale(.97); }
}

.banner { display: flex; flex-wrap: wrap; gap: 8px 14px; align-items: center; justify-content: space-between; background: var(--accent-soft); border: 1px solid var(--line); border-radius: var(--r-s); padding: 10px 14px; margin-bottom: 18px; font-size: 13.5px; }
.button[aria-disabled] { opacity: .5; pointer-events: none; }

/* upload */
.drop { display: block; border: 2px dashed var(--line); border-radius: var(--r); min-height: 320px; cursor: pointer; position: relative; overflow: hidden; background: var(--bg); color: var(--muted); }
.drop.over { border-color: var(--gold); background: var(--accent-soft); }
.drop-empty { position: absolute; inset: 0; display: grid; place-content: center; text-align: center; gap: 6px; padding: 20px; }
.drop-empty svg { width: 46px; height: 46px; margin: 0 auto; color: var(--gold); }
.drop-empty b { color: var(--ink); font-family: var(--display); }
#sketchCanvas { display: block; width: 100%; height: auto; }

/* tabs */
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--line); margin-bottom: 16px; overflow-x: auto; }
.tab { background: none; border: 0; border-bottom: 2px solid transparent; border-radius: 0; padding: 9px 14px; color: var(--muted); }
.tab.active { color: var(--ink); border-bottom-color: var(--gold); }
.badge { font: 700 .62rem var(--body); letter-spacing: .08em; text-transform: uppercase; color: var(--eyebrow); border: 1px solid currentColor; border-radius: 999px; padding: 1px 6px; margin-inline-start: 4px; }
.status { margin-top: 12px; font-size: 13.5px; white-space: pre-wrap; }
.status.error { color: var(--err); }
.status.ok { color: var(--ok); }
.preview-card img { max-width: 100%; border-radius: var(--r-s); display: block; }

/* trace */
.toolbar { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; margin-bottom: 12px; }
.toolbar select { width: auto; padding: 6px 8px; font-size: 13px; }
.tool { background: var(--bg); border: 1px solid var(--line); color: var(--ink); padding: 6px 11px; font-size: 13px; }
.tool.active { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.trace-bar { margin: 0 0 12px; }
.trace-wrap { background: var(--paper); border: 1px solid var(--line); border-radius: var(--r-s); overflow: auto; max-height: 70vh; }
#traceCanvas { display: block; width: 100%; cursor: crosshair; }

/* review */
.plan-preview { background: var(--paper); padding: 10px; }
.plan-preview svg { width: 100%; height: auto; display: block; }
.table-wrap { max-height: 380px; overflow: auto; border: 1px solid var(--line); border-radius: var(--r-s); }
table.data { width: 100%; border-collapse: collapse; font-size: 13px; }
table.data th { text-align: start; font-weight: 700; font-size: 10.5px; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); background: var(--bg); position: sticky; top: 0; }
table.data th, table.data td { padding: 6px 8px; border-bottom: 1px solid var(--line); }
table.data input, table.data select { padding: 4px 6px; font-size: 13px; }
table.data td.num { text-align: end; }
.icon-btn { background: none; border: 0; color: var(--muted); padding: 4px 6px; }
.icon-btn:hover { color: var(--err); }
.notes { font-size: 12.5px; color: var(--muted); margin-top: 12px; }
.notes ul { margin: 4px 0 0; padding-inline-start: 18px; }
details { margin-top: 14px; }
summary { cursor: pointer; font-size: 13px; color: var(--muted); }
details textarea { margin-top: 8px; }

/* sheets */
.sheets { display: grid; grid-template-columns: 200px minmax(0, 1fr); gap: 16px; }
.sheet-list { display: grid; gap: 8px; align-content: start; }
.sheet-thumb { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r-s); padding: 6px; text-align: start; display: block; width: 100%; color: var(--ink); font-weight: 400; white-space: normal; }
.sheet-thumb.active { outline: 2px solid var(--gold); }
.sheet-thumb .thumb { background: var(--paper); border-radius: 4px; overflow: hidden; aspect-ratio: 420/297; max-width: 100%; }
.sheet-thumb .thumb svg { width: 100%; height: 100%; display: block; }
.sheet-thumb span { display: block; font-size: 12px; margin-top: 4px; }
.sheet-thumb span b { margin-inline-end: 4px; font-family: var(--mono); font-weight: 500; }
.sheet-view { padding: 0; overflow: hidden; }
.sheet-bar { margin: 0; padding: 10px 14px; border-bottom: 1px solid var(--line); }
.sheet-canvas { background: var(--sheet-bg); overflow: auto; height: calc(100vh - 250px); min-height: 420px; padding: 20px; }
.sheet-canvas .paper { background: var(--paper); box-shadow: 0 2px 12px rgba(0, 0, 0, .18); margin: 0 auto; }
.sheet-canvas .paper svg { display: block; width: 100%; height: 100%; }

/* render */
.render-card { padding: 12px; }
.seg { display: inline-flex; border: 1px solid var(--line); border-radius: var(--r-s); overflow: hidden; }
.seg button { border-radius: 0; background: var(--surface); color: var(--ink); padding: 6px 11px; font-size: 13px; border: 0; border-inline-end: 1px solid var(--line); }
.seg button:last-child { border-inline-end: 0; }
.seg button.active { background: var(--accent); color: var(--accent-ink); }
.viewport { height: 62vh; min-height: 380px; border-radius: var(--r-s); overflow: hidden; background: var(--viewport); }
.viewport canvas { display: block; width: 100% !important; height: 100% !important; }
#promptRoom { width: auto; }
#renderPrompt { margin-top: 10px; font-family: var(--body); font-size: 13.5px; }

/* export */
.quote { display: flex; flex-wrap: wrap; gap: 16px 24px; align-items: center; justify-content: space-between; background: var(--navy); color: #fff; border-color: transparent; margin-bottom: 16px; }
.quote-txt { display: grid; gap: 6px; min-width: 0; max-width: 64ch; }
.quote-txt p { color: rgba(255, 255, 255, .75); font-size: 14px; }
.quote-act { display: flex; gap: 8px; flex-wrap: wrap; }
.quote .primary { background: #1F7A4D; color: #fff; }
.quote .ghost { color: #fff; border-color: rgba(255, 255, 255, .35); }
.quote .ghost:hover { background: rgba(255, 255, 255, .1); }
.export-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 12px; }
.export { display: grid; text-align: start; gap: 4px; padding: 18px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); color: var(--ink); box-shadow: var(--shadow); white-space: normal; justify-content: stretch; }
.export b { font-family: var(--display); font-size: .98rem; }
.export:hover { border-color: var(--gold); }
.export span { font-size: 12.5px; color: var(--muted); font-weight: 400; }

dialog { border: 1px solid var(--line); border-radius: var(--r); background: var(--surface); color: var(--ink); padding: 18px; width: min(360px, calc(100vw - 32px)); box-shadow: 0 10px 40px rgba(0, 0, 0, .25); }
dialog::backdrop { background: rgba(10, 12, 24, .45); }
dialog label { color: var(--ink); font-size: 14px; margin-bottom: 8px; }
.toast { position: fixed; left: 50%; bottom: calc(20px + env(safe-area-inset-bottom, 0px)); transform: translateX(-50%); background: var(--ink); color: var(--bg); padding: 10px 16px; border-radius: 999px; font-size: 13.5px; z-index: 40; max-width: calc(100% - 32px); }

@media (max-width: 1100px) { .sitenav { display: none; } }
@media (max-width: 960px) {
  .shell { grid-template-columns: minmax(0, 1fr); }
  .steps { border-inline-end: 0; border-bottom: 1px solid var(--line); padding: 8px; overflow-x: auto; }
  .steps ol { display: flex; }
  .steps li { flex: none; }
  .steps li small, .pipeline-summary { display: none; }
  .grid-2, .grid-review, .sheets { grid-template-columns: minmax(0, 1fr); }
  .sheet-list { grid-auto-flow: column; grid-auto-columns: 150px; overflow-x: auto; }
  main { padding-left: var(--gut-l); padding-right: var(--gut-r); padding-block: 20px 40px; }
  .project-pill { display: none; }
}
@media (max-width: 560px) {
  .form.cols-2, .cols-2 { grid-template-columns: minmax(0, 1fr); }
  .span-2 { grid-column: auto; }
  .brand-tag { display: none; }
  .top-actions { margin-inline-start: auto; }
  .hide-sm { display: none; }
}