/* Equatum — "drafting table": blueprint ink for the frame, vellum for the work, a teal trace for fitted curves,
   amber reserved for measurements that do not fit. Barlow (DIN-like engineering grotesk) for text, a real math
   font for equations. Self-hosted: no request leaves this site. */

@font-face { font-family: "Barlow"; font-style: normal; font-weight: 400; font-display: swap; src: url(/fonts/barlow-latin-400-normal.woff2) format("woff2"); unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD; }
@font-face { font-family: "Barlow"; font-style: normal; font-weight: 400; font-display: swap; src: url(/fonts/barlow-latin-ext-400-normal.woff2) format("woff2"); unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF; }
@font-face { font-family: "Barlow"; font-style: italic; font-weight: 400; font-display: swap; src: url(/fonts/barlow-latin-400-italic.woff2) format("woff2"); unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+2000-206F, U+2212; }
@font-face { font-family: "Barlow"; font-style: italic; font-weight: 400; font-display: swap; src: url(/fonts/barlow-latin-ext-400-italic.woff2) format("woff2"); unicode-range: U+0100-02BA, U+1E00-1E9F; }
@font-face { font-family: "Barlow"; font-style: normal; font-weight: 500; font-display: swap; src: url(/fonts/barlow-latin-500-normal.woff2) format("woff2"); unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+2000-206F, U+2212; }
@font-face { font-family: "Barlow"; font-style: normal; font-weight: 500; font-display: swap; src: url(/fonts/barlow-latin-ext-500-normal.woff2) format("woff2"); unicode-range: U+0100-02BA, U+1E00-1E9F; }
@font-face { font-family: "Barlow"; font-style: normal; font-weight: 600; font-display: swap; src: url(/fonts/barlow-latin-600-normal.woff2) format("woff2"); unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+2000-206F, U+2212; }
@font-face { font-family: "Barlow"; font-style: normal; font-weight: 600; font-display: swap; src: url(/fonts/barlow-latin-ext-600-normal.woff2) format("woff2"); unicode-range: U+0100-02BA, U+1E00-1E9F; }
@font-face { font-family: "Barlow Semi Condensed"; font-style: normal; font-weight: 500; font-display: swap; src: url(/fonts/barlow-semi-condensed-latin-500-normal.woff2) format("woff2"); unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+2000-206F, U+2212; }
@font-face { font-family: "Barlow Semi Condensed"; font-style: normal; font-weight: 500; font-display: swap; src: url(/fonts/barlow-semi-condensed-latin-ext-500-normal.woff2) format("woff2"); unicode-range: U+0100-02BA, U+1E00-1E9F; }
@font-face { font-family: "Barlow Semi Condensed"; font-style: normal; font-weight: 600; font-display: swap; src: url(/fonts/barlow-semi-condensed-latin-600-normal.woff2) format("woff2"); unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+2000-206F, U+2212; }
@font-face { font-family: "Barlow Semi Condensed"; font-style: normal; font-weight: 600; font-display: swap; src: url(/fonts/barlow-semi-condensed-latin-ext-600-normal.woff2) format("woff2"); unicode-range: U+0100-02BA, U+1E00-1E9F; }
@font-face { font-family: "Barlow Semi Condensed"; font-style: normal; font-weight: 700; font-display: swap; src: url(/fonts/barlow-semi-condensed-latin-700-normal.woff2) format("woff2"); unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+2000-206F, U+2212; }
@font-face { font-family: "Barlow Semi Condensed"; font-style: normal; font-weight: 700; font-display: swap; src: url(/fonts/barlow-semi-condensed-latin-ext-700-normal.woff2) format("woff2"); unicode-range: U+0100-02BA, U+1E00-1E9F; }

:root {
  --blueprint: #0b2440;      /* frame: header, hero, footer */
  --blueprint-2: #12355b;
  --line: #8fb8dc;           /* blueprint lines on dark */
  --on-dark: #e8f0f7;
  --on-dark-2: #a9c1d6;
  --paper: #f2f5f7;          /* vellum: the working surface */
  --sheet: #ffffff;
  --ink: #0f1d2b;
  --ink-2: #4a5b6c;
  --rule: #d3dde6;
  --rule-strong: #b4c3d0;
  --trace: #0b7a72;          /* fitted curve, primary action (white text on it: 5.2:1) */
  --trace-strong: #08615b;
  --on-trace: #ffffff;       /* text on a trace-coloured surface */
  --trace-wash: #e2f3f1;
  --signal: #d97f0b;         /* a measurement that does not fit */
  --signal-ink: #8f5200;
  --signal-wash: #fdf1e1;
  --danger: #b4321f;
  --danger-wash: #fbe9e6;
  --focus: #3b9ae1;
  --radius: 4px;
  --shadow: 0 1px 2px rgba(11, 36, 64, .06), 0 4px 16px rgba(11, 36, 64, .06);
  --font: "Barlow", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-display: "Barlow Semi Condensed", "Barlow", system-ui, sans-serif;
  --font-mono: ui-monospace, "Cascadia Mono", "SF Mono", Consolas, "Liberation Mono", monospace;
  --font-math: "STIX Two Math", "Cambria Math", "Latin Modern Math", math, serif;
  --measure: 70ch;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #0d1823;
    --sheet: #132231;
    --ink: #e4ecf3;
    --ink-2: #9db0c2;
    --rule: #233649;
    --rule-strong: #34506b;
    --trace: #29b3a7;
    --trace-strong: #49c9bd;
    --on-trace: #04201d;
    --trace-wash: #10322f;
    --signal: #f0a03a;
    --signal-ink: #f5b867;
    --signal-wash: #33240f;
    --danger: #ef7a66;
    --danger-wash: #3a1b16;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 4px 16px rgba(0, 0, 0, .25);
    color-scheme: dark;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font: 400 1rem/1.55 var(--font);
  color: var(--ink);
  background: var(--paper);
  font-feature-settings: "kern", "liga";
}
main { flex: 1; }
img, svg { max-width: 100%; }
a { color: var(--trace-strong); text-underline-offset: .18em; }
a:hover { color: var(--trace); }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; border-radius: 2px; }
h1, h2, h3 { font-family: var(--font-display); font-weight: 600; line-height: 1.15; letter-spacing: -.005em; margin: 0 0 .5em; text-wrap: balance; }
h1 { font-size: clamp(1.9rem, 1.4rem + 1.6vw, 2.5rem); }
h2 { font-size: clamp(1.35rem, 1.15rem + .7vw, 1.65rem); }
h3 { font-size: 1.15rem; }
p { margin: 0 0 1em; max-width: var(--measure); }
small, .meta { font-size: .875rem; color: var(--ink-2); }
code, pre, kbd { font-family: var(--font-mono); font-size: .9em; }
math { font-family: var(--font-math); }
.visually-hidden { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: -999px; top: 0; background: var(--sheet); padding: .5rem 1rem; z-index: 10; }
.skip:focus { left: 1rem; }

.wrap { width: min(1180px, 100% - 2rem); margin-inline: auto; }
.wrap-narrow { width: min(560px, 100% - 2rem); margin-inline: auto; }

/* ---------------------------------------------------------------- frame */

.top {
  background: var(--blueprint);
  color: var(--on-dark);
  border-bottom: 1px solid rgba(143, 184, 220, .18);
}
.top .wrap { display: flex; align-items: center; gap: 1.5rem; min-height: 60px; flex-wrap: wrap; }
.brand { display: inline-flex; align-items: center; gap: .55rem; color: var(--on-dark); text-decoration: none; font-family: var(--font-display); font-weight: 600; font-size: 1.3rem; letter-spacing: .01em; }
.brand:hover { color: #fff; }
.brand svg { flex: none; }
.nav { display: flex; align-items: center; gap: .25rem 1.25rem; margin-left: auto; flex-wrap: wrap; }
.nav a, .nav button.linklike { color: var(--on-dark-2); text-decoration: none; font-weight: 500; padding: .35rem 0; }
.nav a:hover, .nav button.linklike:hover, .nav a[aria-current="page"] { color: #fff; }
.nav a[aria-current="page"] { box-shadow: inset 0 -2px 0 var(--trace); }
.nav form { margin: 0; }
button.linklike { background: none; border: 0; font: inherit; cursor: pointer; }
.nav .btn { padding: .4rem .9rem; }
.nav a.btn, .nav a.btn:hover { color: var(--on-trace); }

.foot { background: var(--blueprint); color: var(--on-dark-2); font-size: .875rem; margin-top: 4rem; }
.foot .wrap { display: flex; gap: 1rem 2rem; flex-wrap: wrap; padding-block: 1.75rem; align-items: baseline; }
.foot a { color: var(--on-dark); }
.foot .spacer { flex: 1; }

/* ---------------------------------------------------------------- controls */

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  font: 600 1rem/1.2 var(--font); padding: .7rem 1.25rem; border-radius: var(--radius);
  border: 1px solid transparent; cursor: pointer; text-decoration: none; white-space: nowrap;
  background: var(--trace); color: var(--on-trace);
}
.btn:hover { background: var(--trace-strong); color: var(--on-trace); }
.btn-quiet { background: transparent; color: var(--ink); border-color: var(--rule-strong); }
.btn-quiet:hover { background: var(--sheet); color: var(--ink); border-color: var(--ink-2); }
.btn-ghost-dark { background: transparent; color: var(--on-dark); border-color: rgba(232, 240, 247, .35); }
.btn-ghost-dark:hover { background: rgba(255, 255, 255, .08); color: #fff; }
.btn-danger { background: transparent; color: var(--danger); border-color: currentColor; }
.btn-danger:hover { background: var(--danger-wash); color: var(--danger); }
.btn-small { padding: .4rem .75rem; font-size: .9rem; }
.btn[disabled], .btn[aria-disabled="true"] { opacity: .55; cursor: not-allowed; }

label { font-weight: 500; }
.field { display: grid; gap: .35rem; margin-bottom: 1.1rem; }
.field .hint { font-size: .875rem; color: var(--ink-2); font-weight: 400; }
input[type=text], input[type=email], input[type=password], input[type=search], select, textarea {
  font: inherit; color: var(--ink); background: var(--sheet);
  border: 1px solid var(--rule-strong); border-radius: var(--radius); padding: .6rem .75rem; width: 100%;
}
textarea { font-family: var(--font-mono); font-size: .875rem; line-height: 1.45; min-height: 14rem; resize: vertical; tab-size: 12; }
input:focus, select:focus, textarea:focus { border-color: var(--focus); outline: none; box-shadow: 0 0 0 3px rgba(59, 154, 225, .25); }
input[aria-invalid="true"] { border-color: var(--danger); }
.check { display: flex; gap: .55rem; align-items: flex-start; font-weight: 400; }
.check input { margin-top: .3rem; accent-color: var(--trace); }
fieldset { border: 0; padding: 0; margin: 0 0 1.25rem; min-width: 0; }
legend { font-weight: 600; padding: 0; margin-bottom: .45rem; }
.choices { display: grid; gap: .45rem; }
.choice { display: grid; grid-template-columns: auto 1fr; gap: .1rem .6rem; align-items: start; padding: .65rem .8rem; border: 1px solid var(--rule); border-radius: var(--radius); background: var(--sheet); font-weight: 400; cursor: pointer; }
.choice input { margin-top: .3rem; accent-color: var(--trace); }
.choice strong { font-weight: 600; }
.choice span { grid-column: 2; font-size: .875rem; color: var(--ink-2); }
.choice:has(input:checked) { border-color: var(--trace); box-shadow: inset 3px 0 0 var(--trace); }
.segmented { display: inline-flex; border: 1px solid var(--rule-strong); border-radius: var(--radius); overflow: hidden; flex-wrap: wrap; }
.segmented label { padding: .45rem .8rem; cursor: pointer; font-weight: 500; border-right: 1px solid var(--rule); }
.segmented label:last-child { border-right: 0; }
.segmented input { position: absolute; opacity: 0; pointer-events: none; }
.segmented label:has(input:checked) { background: var(--trace); color: var(--on-trace); }
.segmented label:has(input:focus-visible) { outline: 3px solid var(--focus); outline-offset: -3px; }

.alert { padding: .8rem 1rem; border-radius: var(--radius); border: 1px solid var(--rule); background: var(--sheet); margin-bottom: 1.25rem; }
.alert-error { border-color: var(--danger); background: var(--danger-wash); }
.alert-warn { border-color: var(--signal); background: var(--signal-wash); }
.alert-ok { border-color: var(--trace); background: var(--trace-wash); }
.alert ul { margin: .25rem 0 0; padding-left: 1.2rem; }
.validation-summary-valid { display: none; }
.field-validation-error { color: var(--danger); font-size: .875rem; }

/* ---------------------------------------------------------------- landing */

.hero {
  position: relative; color: var(--on-dark); background-color: var(--blueprint); overflow: hidden;
  background-image:
    linear-gradient(rgba(143, 184, 220, .07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(143, 184, 220, .07) 1px, transparent 1px),
    linear-gradient(rgba(143, 184, 220, .12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(143, 184, 220, .12) 1px, transparent 1px);
  background-size: 24px 24px, 24px 24px, 120px 120px, 120px 120px;
}
.hero::before {
  /* The supplied formula photograph, as a faint layer under the grid: atmosphere, not content. */
  content: ""; position: absolute; inset: 0; z-index: 0;
  background: url(/img/formulas.jpg) center / cover no-repeat;
  opacity: .22; filter: blur(1.5px) saturate(.8);
  mask-image: linear-gradient(90deg, transparent 0%, #000 45%, #000 100%);
}
.hero .wrap { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr); gap: 3rem; align-items: center; padding-block: clamp(3rem, 7vw, 6rem); }
.hero h1 { font-size: clamp(2.4rem, 1.6rem + 3vw, 3.6rem); font-weight: 600; line-height: 1.04; letter-spacing: -.015em; margin-bottom: .45em; }
.hero p.lead { font-size: 1.2rem; color: var(--on-dark-2); max-width: 34rem; }
.hero .actions { display: flex; gap: .75rem; flex-wrap: wrap; margin-top: 1.75rem; }
.hero .note { margin-top: 1rem; font-size: .875rem; color: var(--on-dark-2); }

.plate { background: rgba(5, 20, 36, .55); border: 1px solid rgba(143, 184, 220, .28); border-radius: 6px; padding: 1.1rem 1.1rem .9rem; backdrop-filter: blur(2px); }
.plate svg { display: block; width: 100%; height: auto; }
.plate .eq { font-family: var(--font-math); font-size: clamp(1.25rem, 1rem + .9vw, 1.7rem); color: #fff; margin: .2rem 0 .6rem; }
.plate .eq math { color: #fff; }
.plate figcaption { font-size: .85rem; color: var(--on-dark-2); display: flex; gap: .4rem 1.2rem; flex-wrap: wrap; margin-top: .4rem; }
.key { display: inline-flex; align-items: center; gap: .4rem; }
.key i { display: inline-block; width: 14px; height: 3px; background: var(--trace); border-radius: 2px; }
.key i.dot { width: 7px; height: 7px; border-radius: 50%; background: var(--on-dark); }
.key i.ring { width: 11px; height: 11px; border-radius: 50%; background: transparent; border: 2px solid var(--signal); }

.band { padding-block: clamp(3rem, 6vw, 5rem); }
.band + .band { border-top: 1px solid var(--rule); }
.band h2 { margin-bottom: .35em; }
.band .intro { color: var(--ink-2); font-size: 1.1rem; margin-bottom: 2.25rem; }

.deliverables { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0; border-top: 2px solid var(--ink); }
.deliverables > div { padding: 1.4rem 1.5rem 1.2rem 0; }
.deliverables > div + div { padding-left: 1.5rem; border-left: 1px solid var(--rule); }
.deliverables h3 { font-size: 1.25rem; }
.deliverables p { color: var(--ink-2); }
.deliverables .sample { margin-top: 1rem; padding: .8rem .9rem; background: var(--sheet); border: 1px solid var(--rule); border-radius: var(--radius); font-size: .9rem; }
.deliverables .sample math { font-size: 1.15rem; }
.sample table { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; }
.sample td { padding: .15rem 0; }
.sample td:last-child { text-align: right; }
.sample tr.flag td { color: var(--signal-ink); font-weight: 600; }

.steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 2rem; counter-reset: step; }
.steps li { counter-increment: step; position: relative; padding-top: 3.1rem; }
.steps li::before {
  content: counter(step); position: absolute; top: 0; left: 0; width: 2.2rem; height: 2.2rem; border-radius: 50%;
  border: 2px solid var(--trace); color: var(--trace-strong); font: 600 1.05rem/2rem var(--font-display); text-align: center;
}
.steps li:not(:last-child)::after { content: ""; position: absolute; top: 1.1rem; left: 2.9rem; right: -1.4rem; border-top: 2px dotted var(--rule-strong); }
.steps h3 { margin-bottom: .35rem; }
.steps p { color: var(--ink-2); font-size: .975rem; }

.facts { display: grid; grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr)); gap: 1.25rem 2rem; }
.facts div { border-left: 3px solid var(--trace); padding-left: 1rem; }
.facts strong { display: block; font-family: var(--font-display); font-size: 1.1rem; font-weight: 600; margin-bottom: .2rem; }
.facts span { color: var(--ink-2); font-size: .95rem; }

/* who is behind the site: heading in the margin, prose beside it, like a note in a textbook */
.about .wrap { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.6fr); gap: 1.5rem 4rem; align-items: start; }
.about h2 { margin: 0; font-size: clamp(1.5rem, 1.1rem + 1.4vw, 2.1rem); max-width: 18ch; }
.about-text p { color: var(--ink-2); font-size: 1.05rem; max-width: 62ch; }
.about-text p + p { margin-top: 1rem; }
.about-text .about-contact { color: var(--ink); border-top: 1px solid var(--rule); padding-top: 1rem; }

.cta {
  position: relative; color: var(--on-dark); background: var(--blueprint); overflow: hidden;
}
.cta::before {
  content: ""; position: absolute; inset: 0; background: url(/img/wave.jpg) center 60% / cover no-repeat; opacity: .55;
  mask-image: linear-gradient(90deg, transparent, #000 60%);
}
.cta .wrap { position: relative; padding-block: clamp(3rem, 6vw, 4.5rem); }
.cta h2 { font-size: clamp(1.6rem, 1.2rem + 1.5vw, 2.3rem); max-width: 22ch; }
.cta p { color: var(--on-dark-2); }
main:has(> .cta:last-child) + .foot { margin-top: 0; }

/* ---------------------------------------------------------------- app pages */

.page { padding-block: 2.25rem 1rem; }
.page-head { display: flex; align-items: flex-end; gap: 1rem 2rem; flex-wrap: wrap; margin-bottom: 1.5rem; }
.page-head h1 { margin: 0; }
.page-head .spacer { flex: 1; }
.page-head .meta { width: 100%; margin: .2rem 0 0; }

.sheet { background: var(--sheet); border: 1px solid var(--rule); border-radius: 6px; padding: clamp(1rem, 2.5vw, 1.75rem); margin-bottom: 1.5rem; box-shadow: var(--shadow); }
.sheet > h2:first-child, .sheet > h3:first-child { margin-top: 0; }
.sheet-flat { box-shadow: none; }

.grid-2 { display: grid; grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr); gap: 1.5rem; align-items: start; }

table.data { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; font-size: .95rem; }
table.data th, table.data td { text-align: left; padding: .55rem .75rem; border-bottom: 1px solid var(--rule); vertical-align: top; }
table.data th { font-weight: 600; font-size: .85rem; color: var(--ink-2); border-bottom: 1px solid var(--rule-strong); white-space: nowrap; }
table.data td.num, table.data th.num { text-align: right; white-space: nowrap; }
table.data tbody tr:hover { background: color-mix(in srgb, var(--trace-wash) 50%, transparent); }
table.data a.row-link { color: var(--ink); font-weight: 600; text-decoration: none; }
table.data a.row-link:hover { color: var(--trace-strong); text-decoration: underline; }
.table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.formula-cell { font-family: var(--font-mono); font-size: .82rem; color: var(--ink-2); max-width: 32rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.status { display: inline-flex; align-items: center; gap: .4rem; font-size: .85rem; font-weight: 600; white-space: nowrap; }
.status::before { content: ""; width: .55rem; height: .55rem; border-radius: 50%; background: var(--ink-2); }
.status-queued::before, .status-submitted::before { background: transparent; border: 2px solid var(--ink-2); }
.status-running::before { background: var(--trace); animation: pulse 1.4s ease-in-out infinite; }
.status-completed::before { background: var(--trace); }
.status-failed { color: var(--danger); }
.status-failed::before { background: var(--danger); }
.status-cancelled { color: var(--ink-2); }
.tag-suspect { color: var(--signal-ink); font-weight: 600; }
@keyframes pulse { 50% { opacity: .35; } }

.empty { text-align: left; padding: 2.5rem; border: 1px dashed var(--rule-strong); border-radius: 6px; background: var(--sheet); }
.empty h2 { margin-bottom: .3rem; }

/* new analysis */
.preview { margin-top: 1rem; }
.preview .summary { font-size: .9rem; color: var(--ink-2); margin: .5rem 0; display: flex; gap: .5rem 1rem; flex-wrap: wrap; align-items: baseline; }
.preview table { font-size: .85rem; }
.preview th { vertical-align: bottom; min-width: 7rem; }
.preview th .colname { display: block; color: var(--ink); font-weight: 600; font-size: .9rem; margin-bottom: .35rem; white-space: normal; }
.preview th .role { display: grid; gap: .15rem; font-weight: 400; color: var(--ink-2); font-size: .8rem; }
.preview th .role label { font-weight: 400; display: flex; gap: .35rem; align-items: center; cursor: pointer; }
.preview th .role input { accent-color: var(--trace); }
.preview th.is-target { box-shadow: inset 0 -3px 0 var(--trace); }
.preview th.is-ignored, .preview td.is-ignored { opacity: .45; }
.preview td.missing { color: var(--signal-ink); }
.drop { border: 1px dashed var(--rule-strong); border-radius: var(--radius); padding: .75rem; display: flex; gap: .75rem; align-items: center; flex-wrap: wrap; background: var(--paper); margin-bottom: .75rem; }
.drop.dragging { border-color: var(--trace); background: var(--trace-wash); }
.drop input[type=file] { font: inherit; font-size: .9rem; max-width: 100%; }
.drop select { width: auto; flex: 1 1 14rem; }
details.advanced summary { cursor: pointer; font-weight: 600; margin-bottom: .75rem; }
.ops { display: flex; flex-wrap: wrap; gap: .35rem .9rem; }
.ops label { font-family: var(--font-mono); font-weight: 400; display: inline-flex; gap: .3rem; align-items: center; }
.quota { font-size: .875rem; color: var(--ink-2); margin-top: .75rem; }

/* results */
.verdict { display: grid; grid-template-columns: auto 1fr; gap: .25rem 1rem; align-items: start; }
.verdict .mark { width: 2.4rem; height: 2.4rem; border-radius: 50%; display: grid; place-items: center; color: var(--on-trace); background: var(--trace); font-weight: 700; }
.verdict .mark.warn { background: var(--signal); color: #2b1700; }
.verdict .mark.bad { background: var(--danger); }
.verdict h2 { margin: .15rem 0 .25rem; }
.verdict p { margin-bottom: .4rem; color: var(--ink-2); }

.equation { padding: 1.25rem 0 1rem; overflow-x: auto; }
.equation math { font-size: clamp(1.35rem, 1.05rem + 1.1vw, 2rem); }
.equation.small math { font-size: 1.15rem; }
.equation.long math { font-size: clamp(1rem, .9rem + .4vw, 1.25rem); }
.equation { scrollbar-width: thin; }
.stats { display: flex; flex-wrap: wrap; gap: .5rem 2rem; margin: .5rem 0 1rem; padding: 0; list-style: none; }
.stats li { display: grid; }
.stats li span { font-size: .8rem; color: var(--ink-2); }
.stats li strong { font-family: var(--font-display); font-size: 1.25rem; font-weight: 600; font-variant-numeric: tabular-nums; }

.tabs { display: flex; gap: 0; border-bottom: 1px solid var(--rule); margin-top: .5rem; flex-wrap: wrap; }
.tabs button { font: 500 .9rem var(--font); background: none; border: 0; border-bottom: 2px solid transparent; padding: .5rem .85rem; color: var(--ink-2); cursor: pointer; margin-bottom: -1px; }
.tabs button[aria-selected="true"] { color: var(--ink); border-bottom-color: var(--trace); }
.code { position: relative; }
.code pre { margin: 0; background: var(--paper); border: 1px solid var(--rule); border-top: 0; padding: .9rem 1rem; overflow-x: auto; white-space: pre-wrap; word-break: break-all; font-size: .82rem; line-height: 1.5; border-radius: 0 0 var(--radius) var(--radius); }
.code .copy { position: absolute; top: .5rem; right: .5rem; }
.code .hint { font-size: .8rem; color: var(--ink-2); margin: .4rem 0 0; }
.precision { font-size: .875rem; margin-top: .75rem; padding-left: .75rem; border-left: 3px solid var(--trace); }
.precision.warn { border-left-color: var(--signal); }

.chart-toolbar { display: flex; align-items: center; gap: .5rem 1rem; flex-wrap: wrap; margin-bottom: .5rem; }
.chart-toolbar .label { font-size: .875rem; color: var(--ink-2); }
.model-pick { display: flex; flex-wrap: wrap; gap: .35rem; }
.model-pick button { font: 500 .85rem var(--font); padding: .3rem .65rem; border-radius: 999px; border: 1px solid var(--rule-strong); background: var(--sheet); color: var(--ink); cursor: pointer; }
.model-pick button[aria-pressed="true"] { background: var(--ink); color: var(--sheet); border-color: var(--ink); }
.model-pick button .rec { color: var(--trace-strong); font-weight: 700; }
.model-pick button[aria-pressed="true"] .rec { color: inherit; }
.chart { width: 100%; min-height: 380px; }
.chart.short { min-height: 240px; }
.chart-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 1rem; }
.chart-note { font-size: .85rem; color: var(--ink-2); margin: .25rem 0 0; }

.progress { display: grid; gap: .6rem; }
.progress .bar { height: 4px; background: var(--rule); border-radius: 2px; overflow: hidden; }
.progress .bar i { display: block; height: 100%; width: 35%; background: var(--trace); animation: slide 1.6s ease-in-out infinite; }
@keyframes slide { 0% { transform: translateX(-100%); } 100% { transform: translateX(300%); } }
.progress .line { font-family: var(--font-mono); font-size: .85rem; color: var(--ink-2); min-height: 1.4em; }

.toc { display: flex; gap: .4rem 1.2rem; flex-wrap: wrap; font-size: .9rem; margin: -.5rem 0 1.25rem; }
.actions-row { display: flex; gap: .6rem; flex-wrap: wrap; align-items: center; }
.actions-row form { margin: 0; }

/* auth pages */
.auth { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); min-height: calc(100vh - 61px); }
.auth-art { position: relative; background: var(--blueprint); color: var(--on-dark); overflow: hidden; display: flex; align-items: flex-end; padding: 3rem; }
.auth-art::before { content: ""; position: absolute; inset: 0; background: url(/img/wave.jpg) center / cover; opacity: .8; }
.auth-art::after { content: ""; position: absolute; inset: 0; background: linear-gradient(0deg, rgba(11, 36, 64, .92), rgba(11, 36, 64, .15) 60%); }
.auth-art blockquote { position: relative; z-index: 1; margin: 0; max-width: 26rem; font-size: 1.15rem; color: var(--on-dark); }
.auth-art blockquote span { display: block; margin-top: .75rem; font-size: .875rem; color: var(--on-dark-2); }
.auth-form { padding: clamp(2rem, 6vw, 4.5rem) clamp(1rem, 5vw, 4rem); display: flex; flex-direction: column; justify-content: center; }
.auth-form form { max-width: 26rem; }
.auth-form h1 { margin-bottom: .3em; }
.auth-form .sub { color: var(--ink-2); margin-bottom: 1.75rem; }
.auth + .foot { margin-top: 0; }

.prose { max-width: var(--measure); }
.prose h2 { margin-top: 2rem; }
.prose li { margin-bottom: .35rem; }
.todo { background: var(--signal-wash); border: 1px dashed var(--signal); padding: .1rem .35rem; border-radius: 3px; }

/* ---------------------------------------------------------------- responsive */

@media (max-width: 900px) {
  .hero .wrap { grid-template-columns: 1fr; gap: 2rem; }
  .deliverables { grid-template-columns: 1fr; }
  .deliverables > div + div { padding-left: 0; border-left: 0; border-top: 1px solid var(--rule); }
  .steps { grid-template-columns: 1fr; gap: 1.5rem; }
  .steps li:not(:last-child)::after { display: none; }
  .grid-2 { grid-template-columns: 1fr; }
  .about .wrap { grid-template-columns: 1fr; gap: 1rem; }
  .about h2 { max-width: none; }
  .auth { grid-template-columns: 1fr; }
  .auth-art { min-height: 9rem; padding: 1.5rem; }
  .auth-art blockquote { font-size: 1rem; }
}
@media (max-width: 560px) {
  .top .wrap { gap: .5rem 1rem; padding-block: .5rem; }
  .nav { gap: .25rem .9rem; margin-left: 0; width: 100%; }
  table.data th, table.data td { padding: .5rem .5rem; }
  .hide-small { display: none; }
  /* the analyses list: one card per analysis instead of five squeezed columns */
  table.stack-small thead { display: none; }
  table.stack-small, table.stack-small tbody, table.stack-small tr, table.stack-small td { display: block; }
  table.stack-small tr { padding: .6rem .9rem .75rem; border-bottom: 1px solid var(--rule); }
  table.stack-small td { padding: .15rem 0; border: 0; }
  table.stack-small td.formula-cell { max-width: none; white-space: normal; overflow-wrap: anywhere; }
  table.stack-small td.hide-small { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}
@media print {
  .top, .foot, .nav, .actions-row, .tabs, .copy, .model-pick, .no-print { display: none !important; }
  body { background: #fff; }
  .sheet { box-shadow: none; border: 0; padding: 0; }
}