/* AeroSculpt design system. Two themes (dark default for the app, light available everywhere),
   one stylesheet for site and app. Colours are tokens; components never hard-code them. */
:root {
  color-scheme: dark;
  --bg: #0a0d13;
  --bg-grad: radial-gradient(1200px 600px at 70% -10%, rgba(57, 135, 229, 0.10), transparent 60%);
  --surface-1: #12161e;
  --surface-2: #181d27;
  --surface-3: #202734;
  --surface-4: #29313f;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.15);
  --text: #f3f5f8;
  --text-2: #c3c8d2;
  --muted: #8b93a3;
  --accent: #3987e5;
  --accent-hover: #5598e7;
  --accent-ink: #9cc6f5;
  --accent-soft: rgba(57, 135, 229, 0.14);
  --accent-line: rgba(57, 135, 229, 0.45);
  --series-1: #3987e5;
  --series-2: #d95926;
  --series-3: #199e70;
  --good: #0ca30c;
  --good-text: #2bc22b;
  --warning: #fab219;
  --warning-text: #f5c65a;
  --critical: #d03b3b;
  --critical-text: #f07070;
  --protect: #fab219;
  --keep: #199e70;
  --design: #3987e5;
  --rc: #2fbf8f;
  --rc-soft: rgba(47, 191, 143, 0.14);
  --heat: #f0803c;
  --heat-soft: rgba(240, 128, 60, 0.14);
  --material: #b38af2;
  --grid: #222a35;
  --axis: #3a4250;
  --vp-bg: radial-gradient(ellipse at 50% 30%, #1a2434 0%, #0b0f16 72%);
  --vp-grid: #2a3342;
  --vp-grid-2: #1a212b;
  --cmap-mid: #3a3a3d;
  --chip: rgba(20, 25, 34, 0.88);
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 12px 32px rgba(0, 0, 0, 0.38);
  --font: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "Cascadia Mono", Consolas, monospace;
}
:root[data-theme="light"] {
  color-scheme: light;
  --bg: #f5f7fa;
  --bg-grad: radial-gradient(1200px 600px at 70% -10%, rgba(42, 120, 214, 0.08), transparent 60%);
  --surface-1: #ffffff;
  --surface-2: #f3f5f8;
  --surface-3: #e9edf2;
  --surface-4: #dde3ea;
  --border: rgba(15, 23, 42, 0.09);
  --border-strong: rgba(15, 23, 42, 0.17);
  --text: #0f172a;
  --text-2: #334155;
  --muted: #64748b;
  --accent: #2a78d6;
  --accent-hover: #256abf;
  --accent-ink: #1c5cab;
  --accent-soft: rgba(42, 120, 214, 0.10);
  --accent-line: rgba(42, 120, 214, 0.45);
  --series-1: #2a78d6;
  --series-2: #eb6834;
  --series-3: #1baf7a;
  --good-text: #006300;
  --warning-text: #8a5a00;
  --critical-text: #b42318;
  --protect: #d99000;
  --keep: #12865c;
  --design: #2a78d6;
  --rc: #12865c;
  --rc-soft: rgba(18, 134, 92, 0.10);
  --heat: #d9581e;
  --heat-soft: rgba(217, 88, 30, 0.10);
  --material: #7c45c9;
  --grid: #e6e9ee;
  --axis: #c3c7cf;
  --vp-bg: radial-gradient(ellipse at 50% 30%, #ffffff 0%, #e3e8ef 75%);
  --vp-grid: #c9d0da;
  --vp-grid-2: #dde2e9;
  --cmap-mid: #d4d6db;
  --chip: rgba(255, 255, 255, 0.92);
  --shadow: 0 12px 32px rgba(15, 23, 42, 0.12);
}
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    color-scheme: light;
    --bg: #f5f7fa;
    --bg-grad: radial-gradient(1200px 600px at 70% -10%, rgba(42, 120, 214, 0.08), transparent 60%);
    --surface-1: #ffffff;
    --surface-2: #f3f5f8;
    --surface-3: #e9edf2;
    --surface-4: #dde3ea;
    --border: rgba(15, 23, 42, 0.09);
    --border-strong: rgba(15, 23, 42, 0.17);
    --text: #0f172a;
    --text-2: #334155;
    --muted: #64748b;
    --accent: #2a78d6;
    --accent-hover: #256abf;
    --accent-ink: #1c5cab;
    --accent-soft: rgba(42, 120, 214, 0.10);
    --accent-line: rgba(42, 120, 214, 0.45);
    --series-1: #2a78d6;
    --series-2: #eb6834;
    --series-3: #1baf7a;
    --good-text: #006300;
    --warning-text: #8a5a00;
    --critical-text: #b42318;
    --protect: #d99000;
    --keep: #12865c;
    --design: #2a78d6;
    --rc: #12865c;
    --rc-soft: rgba(18, 134, 92, 0.10);
    --heat: #d9581e;
    --heat-soft: rgba(217, 88, 30, 0.10);
    --material: #7c45c9;
    --grid: #e6e9ee;
    --axis: #c3c7cf;
    --vp-bg: radial-gradient(ellipse at 50% 30%, #ffffff 0%, #e3e8ef 75%);
    --vp-grid: #c9d0da;
    --vp-grid-2: #dde2e9;
    --cmap-mid: #d4d6db;
    --chip: rgba(255, 255, 255, 0.92);
    --shadow: 0 12px 32px rgba(15, 23, 42, 0.12);
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body { background: var(--bg); background-image: var(--bg-grad); background-repeat: no-repeat; color: var(--text);
  font-family: var(--font); font-size: 15px; line-height: 1.55; -webkit-font-smoothing: antialiased; }
a { color: var(--accent-hover); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4 { line-height: 1.2; margin: 0 0 0.5em; letter-spacing: -0.01em; }
h1 { font-size: clamp(34px, 5vw, 58px); font-weight: 760; letter-spacing: -0.03em; }
h2 { font-size: clamp(25px, 3vw, 36px); font-weight: 720; letter-spacing: -0.02em; }
h3 { font-size: 17px; font-weight: 650; }
p { margin: 0 0 1em; color: var(--text-2); }
small, .small { font-size: 13px; }
.muted { color: var(--muted); }
.mono { font-family: var(--mono); }
.num { font-variant-numeric: tabular-nums; }
.hidden { display: none !important; }
hr { border: 0; border-top: 1px solid var(--border); margin: 24px 0; }
code { font-family: var(--mono); font-size: 0.88em; background: var(--surface-2); border: 1px solid var(--border); padding: 1px 6px; border-radius: 5px; }
pre { font-family: var(--mono); font-size: 13px; background: var(--surface-1); border: 1px solid var(--border);
  padding: 14px 16px; border-radius: var(--radius); overflow-x: auto; color: var(--text-2); }
::selection { background: var(--accent-soft); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ---- layout ---------------------------------------------------------------------- */
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.narrow { max-width: 780px; }
.row { display: flex; gap: 12px; align-items: center; }
.row.wrap { flex-wrap: wrap; }
.spread { justify-content: space-between; }
.grow { flex: 1; min-width: 0; }
.stack > * + * { margin-top: 12px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
@media (max-width: 900px) { .grid-3, .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 620px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; } }

/* ---- top navigation -------------------------------------------------------------- */
.nav { position: sticky; top: 0; z-index: 50; background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(12px); border-bottom: 1px solid var(--border); }
.nav-inner { display: flex; align-items: center; gap: 24px; height: 62px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 760; font-size: 17px; color: var(--text); letter-spacing: -0.02em; }
.brand:hover { text-decoration: none; }
.brand img { width: 28px; height: 28px; }
.nav-links { display: flex; gap: 20px; }
.nav-links a { color: var(--text-2); font-size: 14px; font-weight: 500; }
.nav-links a:hover { color: var(--text); text-decoration: none; }
.nav-right { margin-left: auto; display: flex; gap: 8px; align-items: center; }
@media (max-width: 820px) { .nav-links { display: none; } }

/* ---- buttons --------------------------------------------------------------------- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; height: 38px; padding: 0 16px;
  border-radius: var(--radius-sm); border: 1px solid var(--border-strong); background: var(--surface-2);
  color: var(--text); font: 600 14px var(--font); cursor: pointer; white-space: nowrap; transition: background .15s, border-color .15s, transform .05s; }
.btn:hover { background: var(--surface-3); text-decoration: none; }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { background: var(--accent-hover); }
.btn.ghost { background: transparent; border-color: transparent; color: var(--text-2); }
.btn.ghost:hover { background: var(--surface-2); color: var(--text); }
.btn.danger { background: transparent; border-color: color-mix(in srgb, var(--critical) 50%, transparent); color: var(--critical-text); }
.btn.danger:hover { background: color-mix(in srgb, var(--critical) 12%, transparent); }
.btn.sm { height: 30px; padding: 0 11px; font-size: 13px; }
.btn.xs { height: 26px; padding: 0 9px; font-size: 12px; border-radius: 6px; }
.btn.lg { height: 50px; padding: 0 26px; font-size: 16px; border-radius: var(--radius); }
.btn.block { width: 100%; }
.btn .spin, .spin { width: 14px; height: 14px; border: 2px solid rgba(255,255,255,.35); border-top-color: #fff; border-radius: 50%;
  animation: spin .8s linear infinite; display: inline-block; }
@keyframes spin { to { transform: rotate(360deg); } }
.icon-btn { width: 32px; height: 32px; display: inline-flex; align-items: center; justify-content: center; border-radius: 8px;
  border: 1px solid transparent; background: transparent; color: var(--text-2); cursor: pointer; }
.icon-btn:hover { background: var(--surface-3); color: var(--text); }
svg.i { width: 18px; height: 18px; stroke: currentColor; fill: none; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; flex: none; }
svg.i.sm { width: 15px; height: 15px; }

/* ---- forms ----------------------------------------------------------------------- */
label.field { display: block; margin-bottom: 14px; }
label.field > span, .label { display: block; font-size: 12.5px; color: var(--text-2); margin-bottom: 6px; font-weight: 600; }
input[type=text], input[type=email], input[type=password], input[type=number], select, textarea {
  width: 100%; height: 36px; padding: 0 10px; border-radius: var(--radius-sm); border: 1px solid var(--border-strong);
  background: var(--surface-2); color: var(--text); font: 14px var(--font); outline: none; transition: border-color .15s, background .15s; }
textarea { height: auto; padding: 10px 11px; resize: vertical; }
input:focus, select:focus, textarea:focus { border-color: var(--accent); background: var(--surface-1); }
input.invalid { border-color: var(--critical); }
.field-error { color: var(--critical-text); font-size: 13px; margin-top: 5px; }
input[type=checkbox] { accent-color: var(--accent); width: 16px; height: 16px; }
input[type=range] { width: 100%; accent-color: var(--accent); }
.input-unit { position: relative; }
.input-unit input { padding-right: 44px; }
.input-unit .unit { position: absolute; right: 10px; top: 50%; transform: translateY(-50%); color: var(--muted); font-size: 12px; pointer-events: none; }
.check { display: flex; gap: 10px; align-items: flex-start; font-size: 14px; color: var(--text-2); cursor: pointer; }
.check input { margin-top: 3px; }
.seg { display: inline-flex; background: var(--surface-2); border: 1px solid var(--border-strong); border-radius: var(--radius-sm); padding: 2px; }
.seg button { border: 0; background: transparent; color: var(--text-2); font: 600 13px var(--font); padding: 0 10px; height: 30px; border-radius: 6px; cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center; gap: 4px; white-space: nowrap; }
.seg button.on { background: var(--surface-1); color: var(--text); box-shadow: 0 1px 2px rgba(0,0,0,.15); }
:root[data-theme="dark"] .seg button.on, :root:not([data-theme="light"]) .seg button.on { background: var(--surface-4); }
.seg button:disabled { opacity: .45; cursor: not-allowed; }
.seg button svg.i { width: 13px; height: 13px; }
/* range triplet: min - max - points */
.range3 { display: grid; grid-template-columns: 1fr 1fr 72px; gap: 8px; align-items: end; }
.range3 .label { margin-bottom: 4px; }
.range-preview { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 8px; }
.range-preview span { font-size: 11.5px; font-variant-numeric: tabular-nums; padding: 2px 7px; border-radius: 99px; background: var(--surface-2); border: 1px solid var(--border); color: var(--text-2); }
.range-preview span.mirror { border-style: dashed; color: var(--muted); }

/* ---- surfaces -------------------------------------------------------------------- */
.card { background: var(--surface-1); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; }
.card.pad-lg { padding: 28px; }
.card h3 { margin-bottom: 6px; }
.badge { display: inline-flex; align-items: center; gap: 6px; height: 22px; padding: 0 8px; border-radius: 999px; font-size: 12px;
  font-weight: 650; background: var(--surface-2); color: var(--text-2); border: 1px solid var(--border); white-space: nowrap; }
.badge svg.i { width: 13px; height: 13px; }
.badge.accent { background: var(--accent-soft); color: var(--accent-ink); border-color: var(--accent-line); }
.badge.good { color: var(--good-text); }
.badge.warn { color: var(--warning-text); }
.badge.bad { color: var(--critical-text); }
.badge .dot { width: 7px; height: 7px; border-radius: 50%; background: currentColor; }
.notice { display: flex; gap: 12px; align-items: flex-start; padding: 12px 14px; border-radius: var(--radius); background: var(--surface-2);
  border: 1px solid var(--border); color: var(--text-2); font-size: 14px; }
.notice.warn { border-color: color-mix(in srgb, var(--warning) 45%, transparent); }
.notice.warn svg { color: var(--warning); }
.notice.info svg { color: var(--accent-hover); }
.notice.bad { border-color: color-mix(in srgb, var(--critical) 45%, transparent); }
.notice.bad svg { color: var(--critical-text); }
table.tbl { width: 100%; border-collapse: collapse; font-size: 13.5px; }
table.tbl th { text-align: left; color: var(--muted); font-weight: 600; font-size: 11.5px; text-transform: uppercase; letter-spacing: .04em;
  padding: 8px 10px; border-bottom: 1px solid var(--border); white-space: nowrap; }
table.tbl td { padding: 8px 10px; border-bottom: 1px solid var(--border); color: var(--text-2); }
table.tbl td.r, table.tbl th.r { text-align: right; font-variant-numeric: tabular-nums; }
table.tbl tr.best td { color: var(--text); background: var(--accent-soft); }
table.tbl tr.sel td { background: var(--surface-2); }
table.tbl.compact td, table.tbl.compact th { padding: 6px 8px; }
.meter { height: 8px; border-radius: 99px; background: var(--accent-soft); overflow: hidden; }
.meter > div { height: 100%; background: var(--accent); border-radius: 99px; transition: width .4s; }
.meter.warn > div { background: var(--warning); }
.meter.bad > div { background: var(--critical); }

/* ---- marketing ------------------------------------------------------------------- */
.hero { position: relative; overflow: hidden; padding: 104px 0 84px; border-bottom: 1px solid var(--border); }
.hero canvas.flow-bg { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero .container { position: relative; }
.eyebrow { display: inline-flex; gap: 8px; align-items: center; font-size: 13px; font-weight: 600; color: var(--accent-ink); background: var(--accent-soft);
  border: 1px solid var(--accent-line); padding: 4px 12px; border-radius: 999px; margin-bottom: 22px; }
.hero h1 { max-width: 760px; }
.hero p.lead { font-size: clamp(17px, 2vw, 20px); max-width: 640px; color: var(--text-2); }
.hero .cta { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 30px; }
.gradient-text { background: linear-gradient(90deg, var(--accent), #2fc4c0); -webkit-background-click: text; -webkit-background-clip: text; background-clip: text; color: transparent; }
section.block { padding: 84px 0; border-bottom: 1px solid var(--border); }
.kicker { color: var(--accent-ink); font-weight: 700; font-size: 12.5px; text-transform: uppercase; letter-spacing: .09em; margin-bottom: 10px; }
.section-head { max-width: 720px; margin-bottom: 36px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.feature { padding: 22px; }
.feature .ico { width: 42px; height: 42px; border-radius: 11px; display: flex; align-items: center; justify-content: center;
  background: var(--accent-soft); color: var(--accent-ink); margin-bottom: 14px; }
.feature p { margin: 0; font-size: 14px; }
.usecase { padding: 0; overflow: hidden; }
.usecase .art { height: 170px; background: var(--vp-bg); border-bottom: 1px solid var(--border); display: flex; align-items: center; justify-content: center; }
.usecase .art svg { width: 82%; height: auto; }
.usecase .body { padding: 22px 24px 24px; }
.usecase ul { margin: 12px 0 0; padding-left: 18px; color: var(--text-2); font-size: 14px; }
.usecase li { margin-bottom: 6px; }
.steps { counter-reset: step; }
.step { position: relative; padding-left: 54px; }
.step::before { counter-increment: step; content: counter(step); position: absolute; left: 0; top: 0; width: 36px; height: 36px;
  border-radius: 50%; background: var(--accent-soft); border: 1px solid var(--accent-line); color: var(--accent-ink); display: flex; align-items: center;
  justify-content: center; font-weight: 750; }
.step h3 { margin-bottom: 4px; }
.step p { font-size: 14.5px; }
.logos { display: flex; flex-wrap: wrap; gap: 10px; }
.chip { padding: 6px 12px; border-radius: 999px; border: 1px solid var(--border-strong); color: var(--text-2); font-size: 13px; background: var(--surface-1); }
.price-card { display: flex; flex-direction: column; padding: 28px; }
.price-card.featured { border-color: var(--accent-line); box-shadow: 0 0 0 1px var(--accent-soft), var(--shadow); }
.price-card .price { font-size: 44px; font-weight: 760; letter-spacing: -0.03em; color: var(--text); }
.price-card .price small { font-size: 15px; color: var(--muted); font-weight: 500; letter-spacing: 0; }
.price-card ul { list-style: none; padding: 0; margin: 18px 0 24px; flex: 1; }
.price-card li { display: flex; gap: 10px; align-items: flex-start; padding: 5px 0; color: var(--text-2); font-size: 14px; }
.price-card li svg { color: var(--good-text); margin-top: 3px; width: 16px; height: 16px; }
.faq details { border-bottom: 1px solid var(--border); padding: 16px 0; }
.faq summary { cursor: pointer; font-weight: 600; color: var(--text); list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq details p { margin: 10px 0 0; }
.stat-band { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.stat-band .v { font-size: 30px; font-weight: 760; letter-spacing: -0.02em; color: var(--text); }
.stat-band .l { font-size: 13px; color: var(--muted); }
@media (max-width: 760px) { .stat-band { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
footer.site { padding: 44px 0 60px; color: var(--muted); font-size: 14px; }
footer.site .cols { display: flex; gap: 40px; flex-wrap: wrap; justify-content: space-between; }
footer.site a { color: var(--text-2); display: block; padding: 3px 0; }
.prose h2 { margin-top: 36px; font-size: 24px; }
.prose h3 { margin-top: 24px; }
.prose li { color: var(--text-2); margin-bottom: 6px; }
.prose p { line-height: 1.7; }

/* ---- auth ------------------------------------------------------------------------- */
.auth-wrap { min-height: calc(100vh - 62px); display: flex; align-items: center; justify-content: center; padding: 40px 16px; }
.auth-card { width: 100%; max-width: 420px; }
.auth-card h1 { font-size: 28px; }

/* ---- app shell -------------------------------------------------------------------- */
.app-top { height: 54px; display: flex; align-items: center; gap: 14px; padding: 0 14px; border-bottom: 1px solid var(--border);
  background: var(--surface-1); position: relative; z-index: 20; }
.crumbs { display: flex; align-items: center; gap: 8px; color: var(--muted); font-size: 14px; min-width: 0; }
.crumbs a { color: var(--text-2); }
.crumbs input.title-edit { height: 30px; width: 300px; max-width: 40vw; background: transparent; border-color: transparent; font-weight: 650; color: var(--text); }
.crumbs input.title-edit:hover { border-color: var(--border-strong); }
.top-right { margin-left: auto; display: flex; align-items: center; gap: 10px; }
.credits-pill { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text-2); padding: 0 10px; height: 30px;
  border-radius: 999px; border: 1px solid var(--border); background: var(--surface-2); }
.credits-pill:hover { text-decoration: none; border-color: var(--border-strong); }
.credits-pill .meter { width: 64px; height: 6px; }
.menu { position: relative; }
.menu-pop { position: absolute; right: 0; top: 40px; min-width: 230px; background: var(--surface-1); border: 1px solid var(--border-strong);
  border-radius: var(--radius); box-shadow: var(--shadow); padding: 6px; z-index: 100; }
.menu-pop a, .menu-pop button { display: flex; width: 100%; gap: 10px; align-items: center; padding: 8px 10px; border-radius: 6px; color: var(--text-2);
  font: 14px var(--font); background: none; border: 0; cursor: pointer; text-align: left; }
.menu-pop a:hover, .menu-pop button:hover { background: var(--surface-2); color: var(--text); text-decoration: none; }
.menu-pop .who { padding: 8px 10px 10px; border-bottom: 1px solid var(--border); margin-bottom: 6px; font-size: 13px; color: var(--muted); }
.avatar { width: 30px; height: 30px; border-radius: 50%; background: linear-gradient(135deg, #3987e5, #199e70); display: flex; align-items: center;
  justify-content: center; font-weight: 700; font-size: 13px; color: #fff; border: 0; cursor: pointer; }
.page-app { padding: 28px 0 64px; }
.trial-banner { display: flex; flex-wrap: wrap; gap: 8px 12px; align-items: center; justify-content: center; padding: 7px 14px; font-size: 13px;
  background: var(--accent-soft); border-bottom: 1px solid var(--border); color: var(--text-2); text-align: center; }
.trial-banner svg { color: var(--accent-ink); }
.demo-banner { background: color-mix(in srgb, var(--warning) 14%, transparent); }

/* dashboard */
.dropzone { border: 1.5px dashed var(--border-strong); border-radius: var(--radius); padding: 30px; text-align: center; cursor: pointer;
  transition: border-color .15s, background .15s; background: var(--surface-1); }
.dropzone:hover, .dropzone.over { border-color: var(--accent); background: var(--accent-soft); }
.dropzone .big { font-size: 16px; font-weight: 650; color: var(--text); margin: 8px 0 4px; }
.proj-card { display: flex; flex-direction: column; padding: 0; overflow: hidden; cursor: pointer; transition: border-color .15s, transform .15s, box-shadow .15s; }
.proj-card:hover { border-color: var(--border-strong); transform: translateY(-2px); box-shadow: var(--shadow); }
.proj-card .thumb { aspect-ratio: 16 / 10; background: var(--vp-bg); display: flex; align-items: center; justify-content: center; color: var(--muted); }
.proj-card .thumb img { width: 100%; height: 100%; object-fit: cover; }
.proj-card .body { padding: 14px 16px; }
.proj-card .name { font-weight: 650; color: var(--text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.sample-card { padding: 16px; cursor: pointer; transition: border-color .15s, transform .15s; }
.sample-card:hover { border-color: var(--accent-line); transform: translateY(-2px); }
.sample-card .tag { font-size: 11px; text-transform: uppercase; letter-spacing: .07em; color: var(--muted); font-weight: 700; }
.stat-tile .label { font-size: 12.5px; color: var(--muted); margin-bottom: 4px; font-weight: 500; }
.stat-tile .value { font-size: 26px; font-weight: 720; color: var(--text); letter-spacing: -0.02em; }
.stat-tile .delta { font-size: 13px; font-weight: 600; margin-top: 2px; }
.delta.good { color: var(--good-text); }
.delta.bad { color: var(--critical-text); }

/* ---- workspace ------------------------------------------------------------------- */
body.ws { height: 100vh; overflow: hidden; display: flex; flex-direction: column; background-image: none; }
.ws-main { flex: 1; min-height: 0; display: grid; grid-template-columns: 360px minmax(0, 1fr) 400px; }
.panel { background: var(--surface-1); border-right: 1px solid var(--border); overflow-y: auto; min-height: 0; }
.panel.right { border-right: 0; border-left: 1px solid var(--border); }
.panel-head { position: sticky; top: 0; z-index: 2; background: var(--surface-1); border-bottom: 1px solid var(--border); display: flex; gap: 2px; padding: 6px; }
.tab { flex: 1; height: 32px; border: 0; background: transparent; color: var(--muted); font: 600 13px var(--font); border-radius: 7px; cursor: pointer; }
.tab:hover { color: var(--text-2); background: var(--surface-2); }
.tab.on { color: var(--text); background: var(--surface-3); }
/* numbered steps in the setup panel */
.sec { border-bottom: 1px solid var(--border); }
.sec-h { display: flex; align-items: center; gap: 10px; padding: 14px 16px; cursor: pointer; user-select: none; }
.sec-h .n { width: 24px; height: 24px; border-radius: 50%; background: var(--accent-soft); border: 1px solid var(--accent-line); color: var(--accent-ink);
  font-size: 12px; font-weight: 750; display: flex; align-items: center; justify-content: center; flex: none; }
.sec-h .t { font-weight: 680; font-size: 14px; color: var(--text); white-space: nowrap; }
.sec-h .s { margin-left: auto; min-width: 0; font-size: 12px; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 150px; }
.sec-h .chev { color: var(--muted); transition: transform .15s; display: inline-flex; }
.sec.closed .chev { transform: rotate(-90deg); }
.sec.closed .sec-b { display: none; }
.sec-b { padding: 0 16px 18px; }
.sec-b .lead { font-size: 13px; color: var(--muted); margin: -4px 0 14px; line-height: 1.5; }
.kv { display: grid; grid-template-columns: 1fr auto; gap: 4px 12px; font-size: 13px; }
.kv .k { color: var(--muted); }
.kv .v { color: var(--text-2); text-align: right; font-variant-numeric: tabular-nums; }
.two { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.aspect { display: flex; gap: 10px; padding: 10px; border: 1px solid var(--border); border-radius: var(--radius-sm); margin-bottom: 8px;
  cursor: pointer; background: var(--surface-2); transition: border-color .15s, background .15s; }
.aspect:hover { border-color: var(--border-strong); }
.aspect.on { border-color: var(--accent-line); background: var(--accent-soft); }
.aspect.locked { opacity: .55; }
.aspect .t { font-weight: 600; font-size: 13.5px; color: var(--text); }
.aspect .d { font-size: 12.5px; color: var(--muted); line-height: 1.4; }
.slider-row { display: flex; align-items: center; gap: 10px; }
.slider-row output { min-width: 48px; text-align: right; font-variant-numeric: tabular-nums; color: var(--text); font-size: 13px; font-weight: 600; }
.est { font-size: 12.5px; color: var(--muted); margin-top: 8px; }
/* protected regions */
.zone { border: 1px solid var(--border); border-left: 3px solid var(--zc, var(--protect)); border-radius: var(--radius-sm); padding: 10px 10px 8px; margin-bottom: 8px; background: var(--surface-2); }
.zone.sel { box-shadow: 0 0 0 1px var(--zc); }
.zone .zh { display: flex; align-items: center; gap: 8px; }
.zone .zh input { height: 28px; font-weight: 600; background: transparent; border-color: transparent; padding: 0 4px; }
.zone .zh input:hover, .zone .zh input:focus { border-color: var(--border-strong); background: var(--surface-1); }
.zone .zgrid { display: grid; grid-template-columns: 54px repeat(3, minmax(0, 1fr)); gap: 4px 6px; align-items: center; margin-top: 8px; font-size: 12px; color: var(--muted); }
.zone .zgrid input { height: 28px; font-size: 12.5px; padding: 0 6px; font-variant-numeric: tabular-nums; }
.zone .zgrid .ax { text-align: center; font-weight: 700; font-size: 11px; }
.zone .zfoot { margin-top: 6px; font-size: 11.5px; }
.zone [data-edit] svg { width: 13px; height: 13px; }
.zone-tools { position: absolute; top: calc(var(--tb-h, 40px) + 22px); left: 50%; transform: translateX(-50%); z-index: 8; display: flex; align-items: center; gap: 6px;
  background: var(--chip); backdrop-filter: blur(8px); border: 1px solid var(--accent-line); border-radius: 12px; padding: 5px 6px 5px 12px;
  box-shadow: var(--shadow); white-space: nowrap; max-width: calc(100% - 24px); }
.zone-tools .zt-name { font-weight: 600; font-size: 12.5px; color: var(--text); max-width: 140px; overflow: hidden; text-overflow: ellipsis; }
.zone-tools .seg button { display: inline-flex; align-items: center; gap: 5px; height: 28px; }
.zone-tools .btn.on { background: color-mix(in srgb, var(--accent) 16%, transparent); color: var(--text); border-color: var(--accent-line); }
.zone-tools svg { width: 13px; height: 13px; }
.viewport:has(.zone-tools:not(.hidden)) .run-card { top: calc(var(--tb-h, 40px) + 72px); }
@container (max-width: 640px) { .zone-tools .zt-name, .zone-tools #zt-reset { display: none; } }
.zone-type { display: inline-flex; align-items: center; gap: 6px; font-size: 11.5px; font-weight: 700; text-transform: uppercase; letter-spacing: .05em; color: var(--zc); }
.zone-add { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 6px; }
.zone-add .btn.sm { height: auto; min-height: 64px; padding: 8px 6px; flex-direction: column; justify-content: flex-start; gap: 3px;
  font-size: 12px; white-space: normal; text-align: center; line-height: 1.25; border-top: 3px solid var(--zc); }
.zone-add .btn.sm .muted { font-size: 11px; }
.zone-add .btn.sm .dot { display: none; }
.picking { cursor: crosshair !important; }
.pick-hint { position: absolute; top: calc(var(--tb-h, 40px) + 22px); left: 50%; transform: translateX(-50%); z-index: 8; background: var(--chip); border: 1px solid var(--accent-line);
  border-radius: 99px; padding: 6px 14px; font-size: 13px; color: var(--text); box-shadow: var(--shadow); }

.viewport { position: relative; min-width: 0; min-height: 0; background: var(--vp-bg); container-type: inline-size; }
.viewport canvas { display: block; width: 100%; height: 100%; }
.vp-toolbar { position: absolute; top: 12px; left: 12px; right: 12px; display: flex; gap: 8px; flex-wrap: wrap; z-index: 5; pointer-events: none; }
.vp-toolbar > * { pointer-events: auto; }
.vp-group { display: flex; gap: 2px; background: var(--chip); border: 1px solid var(--border); border-radius: 10px; padding: 3px; backdrop-filter: blur(8px); }
.vp-group .vbtn { height: 30px; padding: 0 10px; border: 0; background: transparent; color: var(--text-2); font: 600 12.5px var(--font);
  border-radius: 7px; cursor: pointer; display: inline-flex; gap: 6px; align-items: center; white-space: nowrap; }
.vp-group .vbtn:hover { background: var(--surface-3); color: var(--text); }
.vp-group .vbtn.on { background: var(--accent-soft); color: var(--accent-ink); }
.vp-group .vbtn:disabled { opacity: .4; cursor: not-allowed; }
.vp-group select { height: 30px; border: 0; background: transparent; font-weight: 600; font-size: 12.5px; padding: 0 6px; width: auto; color: var(--text-2); }
.vp-corner { position: absolute; right: 12px; bottom: 12px; z-index: 5; display: flex; flex-direction: column; gap: 8px; align-items: flex-end; }
.colorbar { background: var(--chip); border: 1px solid var(--border); border-radius: 10px; padding: 9px 11px; width: 230px; }
.colorbar .t { font-size: 12px; color: var(--text-2); margin-bottom: 6px; font-weight: 600; }
.colorbar .bar { height: 10px; border-radius: 3px; }
.colorbar .ticks { display: flex; justify-content: space-between; font-size: 11px; color: var(--muted); margin-top: 4px; font-variant-numeric: tabular-nums; }
.vp-info { position: absolute; left: 12px; bottom: 12px; z-index: 5; font-size: 12px; color: var(--muted); background: var(--chip);
  border: 1px solid var(--border); border-radius: 8px; padding: 6px 10px; max-width: 55%; }
.vp-cond { position: absolute; left: 12px; bottom: 12px; z-index: 6; display: flex; gap: 8px 10px; align-items: center; flex-wrap: wrap; max-width: calc(100% - 270px);
  background: var(--chip); border: 1px solid var(--border); border-radius: 12px; padding: 6px 10px; box-shadow: var(--shadow); font-size: 12.5px; color: var(--text-2); }
.vp-cond .seg button { height: 26px; font-size: 12px; padding: 0 8px; }
.vp-cond:not(.hidden) ~ .vp-info, .vp-info:has(~ .vp-cond:not(.hidden)) { display: none; }
@container (max-width: 640px) { .vp-cond { max-width: calc(100% - 24px); bottom: 90px; } .colorbar { width: 200px; } }
/* live run card: what the tunnel is doing while a job runs */
.run-card { position: absolute; left: 12px; top: calc(var(--tb-h, 40px) + 22px); z-index: 7; width: 300px; background: var(--chip); backdrop-filter: blur(8px);
  border: 1px solid var(--border); border-radius: 12px; box-shadow: var(--shadow); padding: 12px 14px; font-size: 12.5px; color: var(--text-2);
  display: flex; flex-direction: column; gap: 9px; animation: toastin .25s ease-out; }
.run-card .rc-head { display: flex; align-items: center; gap: 8px; color: var(--text); }
.run-card .rc-head .muted { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; min-width: 0; }
.run-card .rc-pct { font: 600 13px var(--mono); color: var(--text); }
.rc-pulse { width: 9px; height: 9px; border-radius: 50%; background: var(--accent); flex: none; box-shadow: 0 0 0 0 var(--accent);
  animation: rcpulse 1.4s ease-out infinite; }
@keyframes rcpulse { 0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--accent) 60%, transparent); } 100% { box-shadow: 0 0 0 9px transparent; } }
.rc-steps { display: flex; flex-wrap: wrap; gap: 4px 6px; }
.rc-step { display: inline-flex; align-items: center; gap: 4px; font-size: 11.5px; color: var(--muted); padding: 2px 7px 2px 5px; border-radius: 99px;
  border: 1px solid var(--border); }
.rc-step i { width: 7px; height: 7px; border-radius: 50%; border: 1.5px solid currentColor; display: inline-block; }
.rc-step svg { width: 11px; height: 11px; }
.rc-step.done { color: var(--good-text); border-color: color-mix(in srgb, var(--good) 40%, var(--border)); }
.rc-step.now { color: var(--text); border-color: var(--accent); background: color-mix(in srgb, var(--accent) 12%, transparent); }
.rc-step.now i { background: var(--accent); border-color: var(--accent); animation: glow 1.1s ease-in-out infinite; }
.rc-now { color: var(--text); line-height: 1.35; }
.rc-dots { display: flex; flex-wrap: wrap; gap: 4px; }
.rc-dots span { width: 12px; height: 12px; border-radius: 3px; background: var(--surface-3, var(--border)); position: relative; overflow: hidden; }
.rc-dots span.done { background: var(--accent); }
.rc-dots span.now { background: var(--border); outline: 1.5px solid var(--accent); outline-offset: 1px; }
.rc-dots span.now::after { content: ""; position: absolute; left: 0; bottom: 0; width: 100%; height: calc(var(--f, 0) * 100%); background: var(--accent);
  transition: height .8s ease; }
.rc-meter { width: 100%; }
.rc-row { display: flex; justify-content: space-between; gap: 8px; }
.rc-row .k { color: var(--muted); }
.rc-row .v { font-family: var(--mono); color: var(--text); display: inline-flex; align-items: center; gap: 4px; }
.rc-row .v svg { width: 12px; height: 12px; color: var(--good-text); }
.rc-spark { display: block; margin-top: -4px; }
.rc-spark.empty { color: var(--muted); font-size: 12px; margin: 0; }
.rc-foot { display: flex; justify-content: space-between; color: var(--muted); font-size: 11.5px; border-top: 1px solid var(--border); padding-top: 7px; }
.rc-foot svg { width: 12px; height: 12px; vertical-align: -2px; }
@media (prefers-reduced-motion: reduce) { .rc-pulse, .rc-step.now i { animation: none; } }
@container (max-width: 640px) {
  .run-card { width: auto; right: 12px; padding: 9px 12px; gap: 6px; }
  .run-card .rc-steps, .run-card .rc-spark, .run-card .rc-row { display: none; }
  /* phones: one scrollable row of view tools instead of four wrapped rows over the model */
  .vp-toolbar { flex-wrap: nowrap; overflow-x: auto; pointer-events: auto; scrollbar-width: none; padding-bottom: 2px; }
  .vp-toolbar::-webkit-scrollbar { display: none; }
  .vp-toolbar .vp-group { flex: none; }
}

.vp-empty { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; flex-direction: column; color: var(--muted); gap: 10px; }
.vp-empty .spin { border-color: var(--border-strong); border-top-color: var(--accent); width: 22px; height: 22px; border-width: 3px; }

.statusbar { height: 46px; flex: none; border-top: 1px solid var(--border); background: var(--surface-1); display: flex; align-items: center; gap: 14px; padding: 0 14px; font-size: 13px; }
.statusbar .prog { width: 240px; }
.statusbar .stage { color: var(--text-2); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.log-drawer { position: absolute; left: 360px; right: 400px; bottom: 46px; height: 220px; background: var(--surface-1); border-top: 1px solid var(--border-strong);
  z-index: 25; overflow: auto; padding: 10px 14px; font: 12px/1.5 var(--mono); color: var(--text-2); white-space: pre-wrap; }

.kpis { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.kpi { background: var(--surface-2); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 10px 12px; }
.kpi .label { font-size: 11.5px; color: var(--muted); font-weight: 600; margin: 0; }
.kpi .value { font-size: 20px; font-weight: 720; color: var(--text); font-variant-numeric: tabular-nums; letter-spacing: -0.01em; }
.kpi .sub { font-size: 11.5px; color: var(--muted); }
.hero-num { font-size: 46px; font-weight: 760; letter-spacing: -0.03em; line-height: 1.05; color: var(--text); }
.split-bar { display: flex; height: 12px; border-radius: 4px; overflow: hidden; gap: 2px; background: var(--surface-1); }
.split-bar > div { height: 100%; }
.legend { display: flex; gap: 14px; flex-wrap: wrap; font-size: 12px; color: var(--text-2); }
.legend .sw { display: inline-block; width: 10px; height: 10px; border-radius: 3px; margin-right: 6px; vertical-align: -1px; }
.legend .ln { display: inline-block; width: 14px; height: 2px; border-radius: 2px; margin-right: 6px; vertical-align: 3px; }
.legend .ln.dash { background-image: linear-gradient(90deg, currentColor 50%, transparent 50%) !important; background-size: 6px 2px; }
.charts { display: grid; grid-template-columns: 1fr; gap: 14px; }
.chart-card { background: var(--surface-2); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 10px 12px 8px; }
.chart-card .ct { font-size: 12.5px; font-weight: 650; color: var(--text); margin-bottom: 4px; display: flex; justify-content: space-between; gap: 8px; }
.chart-card .ct span { font-weight: 500; color: var(--muted); }
.joblist .job { display: flex; gap: 10px; align-items: center; padding: 10px 12px; border: 1px solid var(--border); border-radius: var(--radius-sm);
  margin-bottom: 8px; cursor: pointer; background: var(--surface-2); }
.joblist .job:hover { border-color: var(--border-strong); }
.joblist .job.on { border-color: var(--accent-line); }
.rel-bar { height: 8px; border-radius: 0 4px 4px 0; background: var(--series-1); }
.section-title { font-size: 11.5px; text-transform: uppercase; letter-spacing: .07em; color: var(--muted); font-weight: 700; margin: 18px 0 8px; }
@media (max-width: 1200px) {
  .ws-main { grid-template-columns: 330px minmax(0, 1fr) 360px; }
  .log-drawer { left: 330px; right: 360px; }
}
@media (max-width: 1050px) {
  .ws-main { grid-template-columns: 320px minmax(0, 1fr); }
  .panel.right { display: none; }
  .ws-main.show-right .panel.right { display: block; position: absolute; right: 0; top: 54px; bottom: 46px; width: 380px; z-index: 15; box-shadow: var(--shadow); }
  .log-drawer { right: 0; left: 320px; }
}
@media (max-width: 720px) {
  body.ws { overflow: auto; height: auto; }
  .ws-main { display: flex; flex-direction: column; }
  .viewport { height: 58vh; order: -1; }
  .panel { border-right: 0; }
  .ws-main .panel.right { display: block; position: static; width: auto; }
  .log-drawer { left: 0; }
}

/* ---- charts ----------------------------------------------------------------------- */
.chart { position: relative; }
.chart svg { display: block; width: 100%; overflow: visible; }
.chart .tick { fill: var(--muted); font-size: 10.5px; font-variant-numeric: tabular-nums; }
.chart .gridline { stroke: var(--grid); stroke-width: 1; }
.chart .axisline { stroke: var(--axis); stroke-width: 1; }
.chart .axis-title { fill: var(--muted); font-size: 10.5px; }
.tooltip { position: absolute; pointer-events: none; background: var(--surface-1); border: 1px solid var(--border-strong); border-radius: 8px;
  padding: 7px 10px; font-size: 12px; color: var(--text); box-shadow: var(--shadow); white-space: nowrap; z-index: 40; }
.tooltip .tt-row { display: flex; gap: 8px; align-items: center; color: var(--text-2); }
.tooltip .tt-row b { color: var(--text); font-weight: 650; margin-left: auto; padding-left: 12px; font-variant-numeric: tabular-nums; }
.tooltip .key { width: 10px; height: 3px; border-radius: 2px; display: inline-block; }

/* ---- overlays --------------------------------------------------------------------- */
.modal-back { position: fixed; inset: 0; background: rgba(4, 6, 10, 0.6); z-index: 200; display: flex; align-items: center; justify-content: center; padding: 16px; }
.modal { width: 100%; max-width: 480px; background: var(--surface-1); border: 1px solid var(--border-strong); border-radius: 14px; box-shadow: var(--shadow); padding: 24px; }
.modal h3 { font-size: 19px; }
.modal .actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 20px; }
.toasts { position: fixed; right: 16px; bottom: 16px; z-index: 300; display: flex; flex-direction: column; gap: 8px; max-width: 380px; }
.toast { background: var(--surface-1); border: 1px solid var(--border-strong); border-radius: var(--radius); padding: 11px 14px; font-size: 14px;
  color: var(--text); box-shadow: var(--shadow); display: flex; gap: 10px; align-items: flex-start; animation: toastin .2s ease-out; }
.toast.bad { border-color: color-mix(in srgb, var(--critical) 50%, transparent); }
.toast.good { border-color: color-mix(in srgb, var(--good) 50%, transparent); }
@keyframes toastin { from { transform: translateY(8px); opacity: 0; } }
.skeleton { background: linear-gradient(90deg, var(--surface-2), var(--surface-3), var(--surface-2)); background-size: 200% 100%;
  animation: shimmer 1.3s infinite; border-radius: 8px; }
@keyframes shimmer { to { background-position: -200% 0; } }

/* ---- print (reports) --------------------------------------------------------------- */
@media print {
  :root { --bg: #fff; --surface-1: #fff; --surface-2: #f5f6f8; --text: #0b0b0b; --text-2: #333; --muted: #666; --border: #ddd; --border-strong: #ccc; --grid: #e5e5e5; --axis: #bbb; }
  body { background: #fff; color: #000; }
  .no-print { display: none !important; }
  .card, .chart-card { break-inside: avoid; }
}

/* ---- tunnels: workspace ----------------------------------------------------------------- */
.notice.good { border-color: color-mix(in srgb, var(--good) 40%, transparent); }
.notice.good svg { color: var(--good-text); }
.badge.heat { background: var(--heat-soft); color: var(--heat); border-color: color-mix(in srgb, var(--heat) 45%, transparent); }
.badge.rc { background: var(--rc-soft); color: var(--rc); border-color: color-mix(in srgb, var(--rc) 45%, transparent); }
.tunnel-bar { padding: 12px 14px 2px; border-bottom: 1px solid var(--border); background: var(--surface-1); position: sticky; top: 0; z-index: 3; }
.tunnel-switch { display: flex; gap: 3px; background: var(--surface-2); border: 1px solid var(--border-strong); border-radius: 10px; padding: 3px; }
.tunnel-switch button { flex: 1; height: 32px; border: 0; background: transparent; color: var(--text-2); font: 650 13px var(--font); border-radius: 7px;
  display: inline-flex; align-items: center; justify-content: center; gap: 7px; cursor: pointer; transition: background .15s, color .15s; }
.tunnel-switch button:hover { color: var(--text); }
.tunnel-switch button.on { background: var(--surface-1); color: var(--text); box-shadow: 0 1px 2px rgba(0,0,0,.18); }
.tunnel-switch .tdot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); }
.tunnel-switch [data-t="rc"] .tdot { background: var(--rc); }
.tunnel-switch [data-t="supersonic"] .tdot { background: var(--heat); }
.tunnel-switch [data-t="general"].on { box-shadow: inset 0 -2px 0 var(--accent), 0 1px 2px rgba(0,0,0,.18); }
.tunnel-switch [data-t="rc"].on { box-shadow: inset 0 -2px 0 var(--rc), 0 1px 2px rgba(0,0,0,.18); }
.tunnel-switch [data-t="supersonic"].on { box-shadow: inset 0 -2px 0 var(--heat), 0 1px 2px rgba(0,0,0,.18); }
.tunnel-note { font-size: 12.5px; color: var(--muted); margin: 8px 2px 10px; line-height: 1.45; }
.prop-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 6px; }
.prop-grid label > span { display: block; font-size: 11.5px; color: var(--muted); margin-bottom: 3px; font-weight: 600; }
.prop-grid input { width: 100%; }
body[data-tunnel="supersonic"] .sec-h .n { background: var(--heat-soft); border-color: color-mix(in srgb, var(--heat) 45%, transparent); color: var(--heat); }
body[data-tunnel="rc"] .sec-h .n { background: var(--rc-soft); border-color: color-mix(in srgb, var(--rc) 45%, transparent); color: var(--rc); }
#retr-row.muted { opacity: .55; }

/* ---- tunnels: home page ----------------------------------------------------------------- */
.hero-tunnels { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 28px; }
.hero-tunnels .ht { display: inline-flex; align-items: center; gap: 9px; padding: 10px 14px; border-radius: 12px; border: 1px solid var(--border-strong);
  background: var(--chip); color: var(--text); font-weight: 650; font-size: 14px; backdrop-filter: blur(6px); transition: border-color .15s, transform .15s; }
.hero-tunnels .ht:hover { text-decoration: none; transform: translateY(-1px); }
.hero-tunnels .ht small { color: var(--muted); font-weight: 500; font-size: 12.5px; }
.hero-tunnels .tdot, .tc-chip .tdot { width: 9px; height: 9px; border-radius: 50%; background: var(--tc, var(--accent)); box-shadow: 0 0 0 3px color-mix(in srgb, var(--tc, var(--accent)) 22%, transparent); }
.ht.rc, .tunnel-card.rc { --tc: var(--rc); }
.ht.general, .tunnel-card.general { --tc: var(--accent); }
.ht.hyper, .tunnel-card.hyper { --tc: var(--heat); }
.hero-tunnels .ht:hover { border-color: var(--tc); }

.speed-ruler { max-width: 900px; margin: 0 auto 34px; display: grid; gap: 8px; }
.speed-ruler .lane { display: grid; grid-template-columns: 92px 1fr; align-items: center; gap: 12px; }
.speed-ruler .lane-l { font-size: 12.5px; font-weight: 650; color: var(--text-2); text-align: right; }
.speed-ruler .track { position: relative; height: 22px; border-radius: 6px; background: var(--surface-2); border: 1px solid var(--border); }
.speed-ruler .band { position: absolute; top: 3px; bottom: 3px; border-radius: 4px; }
.speed-ruler .band.rc { background: linear-gradient(90deg, color-mix(in srgb, var(--rc) 35%, transparent), var(--rc)); }
.speed-ruler .band.general { background: linear-gradient(90deg, color-mix(in srgb, var(--accent) 35%, transparent), var(--accent)); }
.speed-ruler .band.hyper { background: linear-gradient(90deg, #f6b93b, var(--heat) 45%, #bd4446 75%, #6a1b5e); }
.speed-ruler .band.gap { background: repeating-linear-gradient(135deg, transparent 0 5px, var(--border-strong) 5px 7px); }
.speed-ruler .band.estimate { background: repeating-linear-gradient(135deg, color-mix(in srgb, var(--accent) 55%, transparent) 0 5px, color-mix(in srgb, #f6b93b 55%, transparent) 5px 9px); }
.speed-ruler .caption { grid-column: 1 / -1; text-align: center; font-size: 12.5px; color: var(--muted); margin-top: 4px; }
.speed-ruler .caption .hatch { display: inline-block; width: 22px; height: 10px; border-radius: 2px; vertical-align: -1px; margin-right: 6px;
  background: repeating-linear-gradient(135deg, color-mix(in srgb, var(--accent) 55%, transparent) 0 4px, color-mix(in srgb, #f6b93b 55%, transparent) 4px 7px); border: 1px solid var(--border); }
.speed-ruler .band span { position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%); white-space: nowrap; font-size: 11px; color: var(--muted); font-weight: 600; }
.speed-ruler .band.hyper .sub { left: auto; color: #fff; text-shadow: 0 1px 2px rgba(0,0,0,.4); transform: translateY(-50%); }
.speed-ruler .axis .track { background: none; border: 0; height: 16px; }
.speed-ruler .axis .track span { position: absolute; top: 0; transform: translateX(-50%); font-size: 11.5px; color: var(--muted); font-variant-numeric: tabular-nums; white-space: nowrap; }
.speed-ruler .axis .track span:first-child { transform: none; }
.speed-ruler .axis .track span:last-child { transform: translateX(-100%); }

.tunnel-cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.tunnel-card { display: flex; flex-direction: column; background: var(--surface-1); border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; border-top: 3px solid var(--tc); transition: transform .2s, box-shadow .2s; scroll-margin-top: 80px; }
.tunnel-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.tc-art { height: 168px; background: radial-gradient(ellipse at 30% 50%, color-mix(in srgb, var(--tc) 14%, transparent), transparent 70%), var(--vp-bg);
  border-bottom: 1px solid var(--border); display: flex; align-items: center; justify-content: center; }
.tc-art svg { width: 94%; height: 92%; }
.tc-body { padding: 20px 20px 18px; display: flex; flex-direction: column; flex: 1; }
.tc-top { display: flex; justify-content: space-between; align-items: center; gap: 10px; margin-bottom: 12px; }
.tc-chip { display: inline-flex; align-items: center; gap: 8px; font-size: 12.5px; font-weight: 700; color: var(--tc); letter-spacing: .02em; text-transform: uppercase; }
.tc-range { font: 600 12.5px var(--mono); color: var(--text-2); background: var(--surface-2); border: 1px solid var(--border); padding: 3px 8px; border-radius: 6px; }
.tunnel-card h3 { font-size: 21px; margin-bottom: 8px; }
.tunnel-card p { font-size: 14.5px; color: var(--text-2); margin: 0 0 12px; }
.tunnel-card ul { margin: 0 0 18px; padding-left: 18px; font-size: 14px; color: var(--text-2); display: grid; gap: 5px; }
.tunnel-card li::marker { color: var(--tc); }
.tc-foot { margin-top: auto; display: flex; justify-content: space-between; align-items: center; gap: 10px; flex-wrap: wrap;
  padding-top: 14px; border-top: 1px solid var(--border); }
.tc-physics { font-size: 12px; color: var(--muted); font-weight: 600; }
.tunnel-card .btn { border-color: color-mix(in srgb, var(--tc) 55%, transparent); }
.tunnel-card .btn:hover { background: color-mix(in srgb, var(--tc) 14%, transparent); }

/* animated art: spinning blades seen edge-on, moving slipstream and streamlines, pulsing shock */
.tc-art .blade { transform-box: fill-box; transform-origin: center; animation: blade 0.22s linear infinite; }
.tc-art .blade.b2 { animation-delay: -0.055s; }
@keyframes blade { 0% { transform: scaleY(1); } 50% { transform: scaleY(-1); } 100% { transform: scaleY(1); } }
.tc-art .slip path { stroke-dasharray: 7 9; animation: flowdash 0.7s linear infinite; opacity: .8; }
.tc-art .slip path.s2 { opacity: .45; animation-duration: 0.55s; }
.tc-art .flow path { stroke-dasharray: 10 12; animation: flowdash 1.6s linear infinite; opacity: .45; }
@keyframes flowdash { to { stroke-dashoffset: -32; } }
.tc-art .shock { animation: shock 2.4s ease-in-out infinite; }
.tc-art .glow { animation: glow 2.4s ease-in-out infinite; transform-box: fill-box; transform-origin: center; }
@keyframes shock { 0%, 100% { opacity: .65; } 50% { opacity: 1; } }
@keyframes glow { 0%, 100% { transform: scale(.94); opacity: .9; } 50% { transform: scale(1.06); opacity: 1; } }
@media (prefers-reduced-motion: reduce) {
  .tc-art .blade, .tc-art .slip path, .tc-art .flow path, .tc-art .shock, .tc-art .glow { animation: none; }
}

.compare-wrap { padding: 6px 4px; overflow-x: auto; }
.compare { width: 100%; border-collapse: collapse; font-size: 14px; min-width: 720px; }
.compare th, .compare td { padding: 12px 14px; text-align: left; vertical-align: top; border-bottom: 1px solid var(--border); }
.compare tbody tr:last-child th, .compare tbody tr:last-child td { border-bottom: 0; }
.compare tbody th { color: var(--muted); font-weight: 600; font-size: 13px; width: 150px; }
.compare td { color: var(--text-2); }
.compare thead th { font-size: 13px; text-transform: uppercase; letter-spacing: .04em; }
.compare .c-rc { color: var(--rc); box-shadow: inset 0 -2px 0 var(--rc); }
.compare .c-general { color: var(--accent-hover); box-shadow: inset 0 -2px 0 var(--accent); }
.compare .c-hyper { color: var(--heat); box-shadow: inset 0 -2px 0 var(--heat); }
@media (max-width: 960px) {
  .tunnel-cards { grid-template-columns: 1fr; max-width: 560px; margin: 0 auto; }
  .speed-ruler .lane { grid-template-columns: 70px 1fr; }
}
@media (max-width: 560px) {
  .speed-ruler .band.gap span, .speed-ruler .band.hyper .sub { display: none; }
  .speed-ruler .axis .track span:nth-child(2), .speed-ruler .axis .track span:nth-child(5) { display: none; }
}

/* ---- tunnels: dashboard ------------------------------------------------------------------ */
.tunnel-pick { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; margin-bottom: 12px; }
.tunnel-pick .tp { --tc: var(--accent); display: flex; align-items: center; gap: 12px; text-align: left; padding: 12px 14px; cursor: pointer;
  background: var(--surface-1); border: 1px solid var(--border); border-radius: var(--radius); color: var(--text-2); font: inherit; transition: border-color .15s, background .15s; }
.tunnel-pick .tp.rc { --tc: var(--rc); }
.tunnel-pick .tp.hyper { --tc: var(--heat); }
.tunnel-pick .tp:hover { border-color: color-mix(in srgb, var(--tc) 50%, transparent); }
.tunnel-pick .tp.on { border-color: var(--tc); background: color-mix(in srgb, var(--tc) 10%, var(--surface-1)); box-shadow: inset 0 0 0 1px var(--tc); }
.tunnel-pick .tp b { display: block; color: var(--text); font-size: 14.5px; }
.tunnel-pick .tp small { display: block; color: var(--muted); font-size: 12.5px; margin-top: 1px; }
.tunnel-pick .tp-ico { width: 38px; height: 38px; flex: none; border-radius: 10px; display: flex; align-items: center; justify-content: center;
  color: var(--tc); background: color-mix(in srgb, var(--tc) 14%, transparent); }
.tunnel-pick .tp-ico svg { width: 20px; height: 20px; }
.tchip { --tc: var(--accent); display: inline-flex; align-items: center; gap: 6px; font-size: 11.5px; font-weight: 700; color: var(--tc);
  text-transform: uppercase; letter-spacing: .03em; white-space: nowrap; }
.tchip.rc { --tc: var(--rc); }
.tchip.hyper { --tc: var(--heat); }
.tchip .tdot { width: 7px; height: 7px; border-radius: 50%; background: var(--tc); }
.sample-head { margin: 18px 0 10px; }
.sample-head:first-child { margin-top: 4px; }
@media (max-width: 760px) { .tunnel-pick { grid-template-columns: 1fr; } }
.val-group { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin: 6px 0 4px; scroll-margin-top: 80px; }
#case-groups td:first-child { min-width: 240px; } #case-groups td:nth-child(2), #case-groups td:nth-child(3) { min-width: 120px; }
.prop-sec { font-size: 11.5px; font-weight: 700; letter-spacing: .04em; text-transform: uppercase; color: var(--rc); margin: 12px 0 6px; }
.prop-fam { display: flex; width: 100%; }
.prop-fam button { flex: 1; }
.nudge { display: flex; gap: 3px; }
.nudge button { flex: 1; height: 26px; border: 1px solid var(--border-strong); background: var(--surface-1); color: var(--text-2); border-radius: 6px;
  font: 700 14px var(--font); cursor: pointer; }
.nudge button:hover { color: var(--text); border-color: var(--rc); }
.step-pick { display: inline-flex; align-items: center; gap: 6px; margin-left: auto; }
.step-pick select { height: 28px; padding: 0 6px; width: auto; }
.prop-est table { margin-top: 2px; }

/* ---- design parameters (template projects) ---- */
.three { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 8px; }
.dp-tools { display: flex; align-items: center; gap: 6px; margin: -2px 0 8px; }
.dp-tools .small { flex: 1; }
.dp-group { border-top: 1px solid var(--border); padding: 8px 0 2px; }
.dp-gh { display: flex; justify-content: space-between; align-items: baseline; gap: 8px; font: 700 12px var(--font); letter-spacing: .04em;
  text-transform: uppercase; color: var(--muted); margin-bottom: 6px; }
.dp-derived { font: 500 12px var(--font); text-transform: none; letter-spacing: 0; color: var(--text-2); text-align: right; }
.dp-row { margin: 0 0 10px; }
.dp-top { display: flex; align-items: center; gap: 8px; }
.dp-l { flex: 1; font-size: 13px; color: var(--text); cursor: help; min-width: 0; }
.dp-num { width: 118px; flex: none; }
.dp-num input { height: 30px; font-size: 13px; padding: 0 6px; }
.dp-lock { flex: none; width: 30px; height: 30px; border-radius: 6px; border: 1px solid var(--border-strong); background: var(--surface-2);
  color: var(--muted); cursor: pointer; display: grid; place-items: center; }
.dp-lock:hover { color: var(--text); }
.dp-lock.on { color: var(--warning-text); border-color: color-mix(in srgb, var(--warning) 45%, var(--border-strong)); }
.dp-lock svg.i { width: 14px; height: 14px; }
.dp-row input[type=range] { width: 100%; margin: 6px 0 2px; }
.dp-bounds { display: flex; align-items: center; gap: 6px; font-size: 11.5px; color: var(--muted); }
.dp-bounds input { width: 70px; height: 24px; font-size: 12px; padding: 0 5px; }
.dp-bounds.dim { opacity: .45; }
.dp-seg { display: flex; flex-wrap: wrap; width: 100%; margin-top: 6px; }
.dp-seg button { flex: 1 1 auto; height: 28px; padding: 0 8px; font-size: 12px; }
.opt-limits { margin: 4px 0 12px; }
.opt-limits summary { cursor: pointer; }

/* ---- screening ranking ---- */
.rank-row { display: grid; grid-template-columns: minmax(90px, 34%) 1fr 58px 64px; align-items: center; gap: 8px; margin: 5px 0; font-size: 12.5px; }
.rank-l { color: var(--text-2); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.rank-row.sel .rank-l { color: var(--text); font-weight: 600; }
.rank-bar { position: relative; height: 10px; background: var(--surface-2); border-radius: 3px; }
.rank-fill { height: 100%; border-radius: 3px; }
.rank-fill.good { background: var(--good); }
.rank-fill.bad { background: var(--series-2); }
.rank-row.noise .rank-fill { opacity: .45; }
.rank-eps { position: absolute; top: -3px; bottom: -3px; border-left: 2px dashed var(--muted); }
.rank-v { text-align: right; font-variant-numeric: tabular-nums; color: var(--text); }
.rank-tag { font-size: 11px; color: var(--muted); }
.rank-row.sel .rank-tag { color: var(--accent-hover); font-weight: 600; }
@media (max-width: 520px) { .three { grid-template-columns: 1fr; } .rank-row { grid-template-columns: 1fr 1fr 52px; } .rank-tag { display: none; } }
.center-page { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 16px; background: var(--bg); }

/* landing: engineering cards end with one measured number */
.eng .feature { display: flex; flex-direction: column; }
.eng .feature p { flex: 1; }
.eng-num { margin-top: 14px; padding-top: 12px; border-top: 1px solid var(--border); font-size: 13px; color: var(--text-2); }
.eng-num b { font: 700 18px var(--mono); color: var(--text); margin-right: 6px; }
.eng-num span { display: block; color: var(--muted); font-size: 12px; margin-top: 2px; }
.btn.busy { opacity: .7; pointer-events: none; }
.guest-box .or { display: flex; align-items: center; gap: 10px; color: var(--muted); font-size: 12px; margin: 18px 0 14px; }
.guest-box .or::before, .guest-box .or::after { content: ""; flex: 1; height: 1px; background: var(--border); }

/* shape features */
.ft-kind { display: flex; align-items: flex-start; gap: 8px; margin: 0 0 8px; }
.ft-kl { flex: none; width: 58px; font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); padding-top: 7px; }
.ft-add { display: flex; flex-wrap: wrap; gap: 6px; }
.ft-add .btn { gap: 6px; }
.ft-add .btn svg { width: 14px; height: 14px; }
.ft-list { margin-top: 12px; display: flex; flex-direction: column; gap: 8px; }
.ft-card { border: 1px solid var(--border); border-left: 3px solid var(--accent); border-radius: var(--radius-sm); background: var(--surface-2); }
.ft-card.sel { border-color: var(--accent-line); box-shadow: 0 0 0 1px var(--accent-line); }
.ft-card.off { opacity: .55; border-left-color: var(--border-strong); }
.ft-h { display: flex; align-items: center; gap: 6px; padding: 7px 8px; cursor: pointer; }
.ft-h input { flex: 1; min-width: 0; height: 28px; font-weight: 600; background: transparent; border-color: transparent; padding: 0 4px; }
.ft-h input:hover, .ft-h input:focus { border-color: var(--border-strong); background: var(--surface-1); }
.ft-h .ft-n { flex: none; width: 18px; height: 18px; border-radius: 50%; background: var(--surface-3); font: 700 10.5px var(--mono); display: flex; align-items: center; justify-content: center; color: var(--text-2); }
.ft-h svg.up { transform: rotate(180deg); }
.ft-h .badge { flex: none; }
.ft-b { display: none; padding: 0 10px 8px; }
.ft-card.open .ft-b { display: block; }
.ft-gen { display: flex; flex-direction: column; gap: 6px; padding: 10px; margin: 0 0 12px; border: 1px dashed var(--accent-line);
  border-radius: var(--radius-sm); background: color-mix(in srgb, var(--accent) 6%, transparent); }
.ft-gen .btn { align-self: flex-start; gap: 6px; }
.ft-opt { display: flex; align-items: center; gap: 8px; margin: 2px 0 8px; font-size: 12.5px; }
.ft-ai { display: flex; flex-direction: column; gap: 6px; margin-top: 6px; padding-top: 8px; border-top: 1px solid var(--border); }
.ft-ai textarea { width: 100%; resize: vertical; font: inherit; font-size: 12.5px; padding: 6px 8px; border-radius: 6px;
  border: 1px solid var(--border-strong); background: var(--surface-1); color: var(--text); }
.ft-ai .btn { align-self: flex-start; gap: 6px; }

/* collapsible results panel (wide layouts) */
.panel-head { display: flex; align-items: center; }
#right-collapse svg { transform: rotate(-90deg); }
.ws-main.right-collapsed { grid-template-columns: 360px minmax(0, 1fr) 0; }
.ws-main.right-collapsed .panel.right { display: none; }
.right-open { position: absolute; right: 0; top: calc(var(--tb-h, 40px) + 22px); z-index: 7; display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 10px 8px 12px; border: 1px solid var(--border); border-right: 0; border-radius: 10px 0 0 10px; background: var(--chip);
  color: var(--text); font: 600 12.5px var(--font); cursor: pointer; box-shadow: var(--shadow); backdrop-filter: blur(8px); }
.right-open:hover { background: var(--surface-2); }
.right-open svg { width: 14px; height: 14px; }
@media (max-width: 1050px) { #right-collapse, .right-open { display: none !important; } .ws-main.right-collapsed { grid-template-columns: 320px minmax(0, 1fr); } }

/* "before you run" checklist and folded advanced settings */
.ready { margin: 10px 14px 4px; padding: 10px 12px; border: 1px solid var(--border); border-radius: var(--radius-sm); background: var(--surface-2); font-size: 12.5px; }
.ready .rh { display: flex; align-items: center; gap: 8px; font-weight: 700; color: var(--text); margin-bottom: 6px; }
.ready .rh .grow { flex: 1; }
.ready .steps { color: var(--muted); font-size: 11.5px; margin: 0 0 8px; }
.ready ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 6px; }
.ready li { display: grid; grid-template-columns: 18px 1fr; gap: 6px; align-items: start; color: var(--text-2); line-height: 1.35; }
.ready li svg { width: 15px; height: 15px; margin-top: 1px; }
.ready li.ok svg { color: var(--good-text); }
.ready li.warn svg { color: var(--warning-text); }
.ready li.bad svg { color: var(--critical-text); }
.ready li.tip svg { color: var(--accent); }
.ready li .fix { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 4px; }
.ready li .fix .btn { height: 24px; padding: 0 8px; font-size: 11.5px; }
.ready.all-ok { border-color: color-mix(in srgb, var(--good) 40%, var(--border)); }
details.adv { margin: 8px 0 12px; border-top: 1px dashed var(--border); padding-top: 8px; }
details.adv > summary { cursor: pointer; font-size: 12.5px; font-weight: 600; color: var(--text-2); list-style: revert; }
details.adv > summary .muted { font-weight: 400; margin-left: 4px; }

/* simple view for beginners: advanced parts appear with the switch */
.ws-main:not(.adv) .adv-only, .ws-main:not(.adv) details.adv { display: none !important; }
.adv-switch { display: flex; align-items: center; gap: 8px; margin: 6px 14px 8px; font-size: 12.5px; color: var(--text-2); cursor: pointer; user-select: none; }
.adv-switch input { position: absolute; opacity: 0; pointer-events: none; }
.adv-switch .sw { width: 30px; height: 17px; border-radius: 99px; background: var(--border-strong); position: relative; flex: none; transition: background .15s; }
.adv-switch .sw::after { content: ""; position: absolute; top: 2px; left: 2px; width: 13px; height: 13px; border-radius: 50%; background: var(--surface-1); transition: transform .15s; }
.adv-switch input:checked + .sw { background: var(--accent); }
.adv-switch input:checked + .sw::after { transform: translateX(13px); }
.adv-switch input:focus-visible + .sw { outline: 2px solid var(--accent); outline-offset: 2px; }
.adv-switch #adv-hint { margin-left: auto; }
.check { display: flex; gap: 8px; align-items: flex-start; font-size: 12.5px; color: var(--text-2); margin: 6px 0; cursor: pointer; }
.check input { margin-top: 2px; accent-color: var(--accent); }
.road-block { margin: 10px 0 4px; padding: 8px 10px; border: 1px solid var(--border); border-radius: 8px; }
.field.sm > span { font-size: 11.5px; }
.field.sm input { padding: 5px 8px; font-size: 12.5px; }
.mission-in .field.sm { width: 104px; margin: 0; }
svg .ax { font: 10px var(--sans, sans-serif); fill: var(--muted); }
.joblist .cmp { margin-right: 4px; accent-color: var(--accent); }
.rounds { margin: 0 0 12px; padding: 0; list-style: none; display: flex; flex-direction: column; gap: 4px; font-size: 12.5px; }
.rounds li { display: flex; gap: 8px; align-items: baseline; }
.rounds .rn { flex: none; font: 600 11px var(--mono); color: var(--muted); width: 56px; }

/* rockets: the Flight tab */
.rk-sil svg { width: 100%; height: auto; display: block; }
.rk-sil .ax { font: 10px var(--font); fill: var(--muted); }
.rk-checks { list-style: none; padding: 0; margin: 4px 0 0; display: grid; gap: 6px; }
.rk-checks li { display: flex; gap: 8px; align-items: flex-start; font-size: 13px; color: var(--text-2); }
.rk-checks li svg { flex: none; width: 16px; height: 16px; margin-top: 1px; }
.rk-checks li b { color: var(--text); font-weight: 600; }
.rk-checks li.ok svg { color: var(--good-text); }
.rk-checks li.bad svg { color: var(--critical-text); }
.rk-checks li.warn svg { color: var(--warning); }
.rk-items input { width: 100%; min-width: 0; padding: 4px 6px; font-size: 13px; }
.rk-items td { padding: 4px 6px; }
#rk-chute-opts.muted { opacity: .5; }