/* Joints. Colours and type as the other apps (apps.onurkoc.net, SettlementTrough).
   Colour scheme: the system setting (prefers-color-scheme), unless
   data-theme="light" or "dark" is set on <html> by the switch in the
   header (app/ui/theme.js). All colours of the graphics are variables:
   the SVG text of the plots refers to them, nothing is drawn in a fixed colour. */
:root, [data-theme="light"] {
  --bg: #f6f5f2;
  --surface: #ffffff;
  --text: #1c1b19;
  --muted: #5f5c55;
  --line: #dedbd3;
  --grid: #eeece6;
  --accent: #c2410c;
  --accent-soft: #fbe9df;
  --shadow: 0 1px 2px rgba(0,0,0,.04), 0 8px 24px rgba(0,0,0,.06);
  --error: #b42318;
  --ok: #2e7d4f;
  /* plots */
  --net: #cdc9c0;
  --net-rim: #6f6b63;
  --plot-bg: #fbfaf8;
  --profile-fill: rgba(95, 92, 85, .13);
  --halo: #ffffff;
  /* joint sets in this order: green, red, blue, orange, turquoise; tunnel: violet */
  --joint1: #2f9e44;
  --joint2: #d9363e;
  --joint3: #2563eb;
  --joint4: #e8730c;
  --joint5: #0d9488;
  --tunnel: #7c3aed;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-plot: system-ui, "Segoe UI", Roboto, Arial, sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #141413;
    --surface: #1d1c1a;
    --text: #f1efe9;
    --muted: #a6a29a;
    --line: #34322e;
    --grid: #2a2926;
    --accent: #f07a3e;
    --accent-soft: #3a2418;
    --shadow: 0 1px 2px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.35);
    --error: #f97066;
    --ok: #4cc27f;
    --net: #3f3d38;
    --net-rim: #8f8b83;
    --plot-bg: #181715;
    --profile-fill: rgba(166, 162, 154, .16);
    --halo: #1d1c1a;
    --joint1: #4cc27f;
    --joint2: #f97066;
    --joint3: #60a5fa;
    --joint4: #fb923c;
    --joint5: #2dd4bf;
    --tunnel: #a78bfa;
    color-scheme: dark;
  }
}

/* dark colours chosen in the header, also with a light system */
:root[data-theme="dark"] {
  --bg: #141413;
  --surface: #1d1c1a;
  --text: #f1efe9;
  --muted: #a6a29a;
  --line: #34322e;
  --grid: #2a2926;
  --accent: #f07a3e;
  --accent-soft: #3a2418;
  --shadow: 0 1px 2px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.35);
  --error: #f97066;
  --ok: #4cc27f;
  --net: #3f3d38;
  --net-rim: #8f8b83;
  --plot-bg: #181715;
  --profile-fill: rgba(166, 162, 154, .16);
  --halo: #1d1c1a;
  --joint1: #4cc27f;
  --joint2: #f97066;
  --joint3: #60a5fa;
  --joint4: #fb923c;
  --joint5: #2dd4bf;
  --tunnel: #a78bfa;
  color-scheme: dark;
}

* { box-sizing: border-box; }
/* hidden wins over display: grid/flex of the layout rules */
[hidden] { display: none !important; }
html, body { margin: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
.wrap { max-width: 1440px; margin: 0 auto; padding: 0 16px; }
a { color: var(--accent); }
button, input { font: inherit; color: inherit; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }

/* header */
.top { border-bottom: 1px solid var(--line); background: var(--surface); }
.top-row { display: flex; align-items: flex-end; justify-content: space-between; gap: 8px 16px; padding-top: 20px; flex-wrap: wrap; }
.eyebrow {
  font-size: 12px; letter-spacing: .12em; text-transform: uppercase;
  color: var(--accent); font-weight: 600; margin: 0 0 4px;
}
h1 { font-size: clamp(24px, 4vw, 32px); line-height: 1.1; margin: 0 0 12px; letter-spacing: -.02em; }
.top-actions { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; justify-content: flex-end; margin-bottom: 12px; }
.back { font-size: 14px; font-weight: 600; text-decoration: none; white-space: nowrap; }
.seg.theme-switch { margin: 0; }
.seg.theme-switch span { padding: 3px 10px; font-size: 12px; }

main { padding-top: 16px; padding-bottom: 40px; }
.card {
  background: var(--surface); border: 1px solid var(--line); border-radius: 14px;
  box-shadow: var(--shadow);
}

/* layout: inputs left, plots and results right; one column on a phone */
.calc { display: grid; gap: 16px; grid-template-columns: minmax(0, 1fr); }
@media (min-width: 900px) {
  .calc { grid-template-columns: 370px minmax(0, 1fr); align-items: start; }
  .inputs { position: sticky; top: 12px; max-height: calc(100vh - 24px); overflow: auto; }
  .inputs > summary { display: none; }
}
.main { display: grid; gap: 16px; min-width: 0; grid-template-columns: minmax(0, 1fr); }

/* inputs */
.inputs { padding: 4px 14px 14px; }
.inputs > summary { cursor: pointer; font-weight: 700; padding: 10px 0; list-style-position: inside; }
fieldset { border: 0; border-top: 1px solid var(--line); margin: 10px 0 0; padding: 10px 0 0; min-width: 0; }
fieldset:first-of-type { border-top: 0; }
legend { font-weight: 700; font-size: 15px; padding: 0; }
.field { margin: 8px 0; min-width: 0; }
.field label { display: block; font-size: 13px; color: var(--muted); }
.unit { color: var(--muted); }
.two { display: grid; grid-template-columns: 1fr 1fr; gap: 0 12px; }
.pair { display: grid; grid-template-columns: minmax(0, 1fr) 72px; gap: 10px; align-items: center; }
.pair input[type="range"] { width: 100%; accent-color: var(--accent); }
input[type="text"] {
  width: 100%; padding: 4px 6px; border: 1px solid var(--line); border-radius: 6px;
  background: var(--bg); text-align: right;
}
input[type="text"]:focus-visible { outline: 2px solid var(--accent); outline-offset: -1px; }
input[type="text"].invalid { border-color: var(--error); outline: 1px solid var(--error); }
.err { color: var(--error); font-size: 12px; }
.err:empty { display: none; }

/* joint table in the form */
.table-wrap { overflow-x: auto; }
table.joints { border-collapse: collapse; width: 100%; font-size: 13px; }
table.joints th { text-align: left; font-weight: 600; color: var(--muted); font-size: 12px; padding: 2px 4px 4px; vertical-align: bottom; }
table.joints td { padding: 2px 3px; }
table.joints td.err { padding: 0 3px 4px; }
table.joints input[type="text"] { padding: 3px 4px; text-align: right; }
table.joints td:nth-child(2) input { text-align: left; }
table.joints th:nth-child(n+3):nth-child(-n+5) { text-align: right; }
table.joints td:nth-child(3), table.joints td:nth-child(4), table.joints td:nth-child(5) { width: 58px; }
.col-color { width: 18px; }
.col-rm { width: 26px; }
.swatch { display: inline-block; width: 12px; height: 12px; border-radius: 3px; vertical-align: -1px; margin-right: 6px; }
.col-color .swatch { margin: 0; }
button.rm {
  width: 24px; height: 24px; padding: 0; line-height: 1; font-size: 16px;
  border: 1px solid var(--line); background: var(--bg); border-radius: 6px; cursor: pointer; color: var(--muted);
}
button.rm:hover { border-color: var(--error); color: var(--error); }

/* buttons */
.actions { display: flex; gap: 8px; }
.form-actions { justify-content: flex-end; margin-top: 12px; }
.form-actions.left { justify-content: flex-start; margin-top: 8px; }
.actions button {
  border: 1px solid var(--line); background: var(--bg); border-radius: 8px; padding: 6px 12px;
  cursor: pointer; font-size: 14px; font-weight: 600;
}
.actions button:hover:not(:disabled) { border-color: var(--accent); color: var(--accent); }
.actions button:disabled { opacity: .5; cursor: default; }

/* segmented switch (theme) */
.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; margin: 6px 0 2px; }
.seg label { position: relative; }
.seg input { position: absolute; opacity: 0; inset: 0; cursor: pointer; }
.seg span { display: block; padding: 4px 12px; font-size: 13px; }
.seg input:checked + span { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.seg input:focus-visible + span { outline: 2px solid var(--accent); outline-offset: -2px; }

.msg {
  border: 1px solid var(--error); color: var(--error); background: var(--surface);
  border-radius: 10px; padding: 8px 12px; font-weight: 600;
}

/* plots: two side by side when there is room */
.plots { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(min(100%, 440px), 1fr)); align-items: start; }
.plot-card { padding: 12px 14px 8px; min-width: 0; }
.plot-card h2 { font-size: 15px; margin: 0 0 6px; }
.plot { width: 100%; max-width: 680px; margin: 0 auto; min-width: 0; }
.plot svg { display: block; max-width: 100%; height: auto; }
.plot-msg { color: var(--error); font-weight: 600; padding: 16px 0; margin: 0; }
.plot svg text { font-family: var(--font-plot); font-size: 12px; fill: var(--text); }

/* stereonet */
svg.net .grid { fill: none; stroke: var(--net); stroke-width: 1; }
svg.net .rim { fill: none; stroke: var(--net-rim); stroke-width: 1.5; }
svg.net .cardinal { font-weight: 700; font-size: 13px; }
svg.net .tunnel-line { stroke: var(--tunnel); stroke-width: 2.5; }
svg.net .tunnel-head { fill: var(--tunnel); stroke: var(--tunnel); stroke-width: 1; stroke-linejoin: round; }
svg.net .labels { pointer-events: none; }
svg.net .tunnel-label { fill: var(--tunnel); font-weight: 600; paint-order: stroke; stroke: var(--halo); stroke-width: 4px; stroke-linejoin: round; }
svg.net .joint .gc { fill: none; stroke: var(--c); stroke-width: 2; }
svg.net .joint .hit { fill: none; stroke: transparent; stroke-width: 12; pointer-events: stroke; }
svg.net .joint .pole { fill: var(--c); stroke: var(--halo); stroke-width: 1.5; }
svg.net .joint .hit-pole { fill: transparent; }
svg.net .plabel { fill: var(--c); font-weight: 600; paint-order: stroke; stroke: var(--halo); stroke-width: 4px; stroke-linejoin: round; }
svg.net .joint:hover .gc { stroke-width: 3.5; }
svg.net .joint:hover .pole { r: 7; }

/* cross-section */
svg.section .frame { fill: var(--plot-bg); stroke: var(--line); stroke-width: 1; }
svg.section .set .trace { fill: none; stroke: var(--c); stroke-width: 1.5; }
svg.section .set .hit { fill: none; stroke: transparent; stroke-width: 12; pointer-events: stroke; }
svg.section .set:hover .trace { stroke-width: 3; }
svg.section .profile { fill: var(--profile-fill); stroke: var(--text); stroke-width: 3.5; stroke-linejoin: round; pointer-events: none; }
svg.section .side { fill: var(--muted); font-weight: 600; }
svg.section .scalebar path { fill: none; stroke: var(--text); stroke-width: 1.5; }
svg.section .scalebar text { fill: var(--text); }

.tip {
  position: fixed; z-index: 10; pointer-events: none; white-space: pre-line;
  background: var(--surface); color: var(--text); border: 1px solid var(--line); border-radius: 8px;
  box-shadow: var(--shadow); padding: 6px 10px; font-size: 13px; line-height: 1.4; max-width: 320px;
}
.tip::first-line { font-weight: 700; }

/* results */
.results { padding: 12px 16px 16px; }
.results h2 { font-size: 18px; margin: 0 0 6px; }
table.data { border-collapse: collapse; font-size: 14px; margin: 6px 0; width: 100%; }
table.data th, table.data td { text-align: left; padding: 5px 14px 5px 0; border-bottom: 1px solid var(--grid); white-space: nowrap; }
table.data th { color: var(--muted); font-weight: 600; }
table.data td.num, table.results-table td.num { font-variant-numeric: tabular-nums; }
table.data td.note { white-space: normal; color: var(--muted); }
.muted { color: var(--muted); }
.convention { font-size: 13px; color: var(--muted); margin: 10px 0 0; max-width: 90ch; }

footer { border-top: 1px solid var(--line); padding: 20px 0 32px; color: var(--muted); font-size: 14px; }
footer a { color: inherit; }

/* plot cards: title and export buttons */
.plot-head { display: flex; justify-content: space-between; align-items: center; gap: 8px; flex-wrap: wrap; margin: 0 0 6px; }
.plot-head h2 { margin: 0; }
.plot-head .actions button { padding: 3px 10px; font-size: 13px; }
.plots-actions { justify-content: flex-end; margin: -4px 0 0; }