/* PileReport shared design system — "survey plate" direction.
   Drafting-paper ground, ink linework, one survey-orange accent (the datum line),
   monospace annotations like a drawing title block. No external requests at all. */

:root {
  color-scheme: light;
  --paper: #f5f6f3;
  --paper-2: #eceee9;
  --ink: #191d1a;
  --ink-2: #4a524c;
  --ink-3: #7d867e;
  --rule: #c9cfc8;
  --rule-2: #a7aea6;
  --accent: #d9480f;      /* survey orange — datum lines, focus, key highlights */
  --accent-2: #b03a0c;
  --ramp-lo: #a8c3ad;     /* hypsometric low  (SVG only) */
  --ramp-hi: #e3d3a3;     /* hypsometric high (SVG only) */
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 15.5px/1.6 var(--sans);
  letter-spacing: -0.003em;
}
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 20px; }

a { color: var(--ink); text-decoration: underline; text-decoration-color: var(--rule-2); text-underline-offset: 3px; }
a:hover { text-decoration-color: var(--accent); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ---- title block (drawing corner) ---- */
.titleblock {
  display: flex; flex-wrap: wrap; align-items: stretch;
  border: 1.5px solid var(--ink); border-top: none;
  font: 11px/1.4 var(--mono); text-transform: uppercase; letter-spacing: 0.08em;
}
.titleblock > div {
  padding: 8px 12px; border-right: 1px solid var(--rule-2);
  display: flex; align-items: center; gap: 8px;
}
.titleblock > div:last-child { border-right: none; margin-left: auto; }
.tb-logo { font-weight: 700; font-size: 12px; }
.tb-logo .accent { color: var(--accent); }
.tb-note { color: var(--ink-2); }

/* ---- hero ---- */
.hero { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 6fr); gap: 36px; align-items: center; padding: 52px 0 40px; }
.hero h1 { font-size: clamp(30px, 4.6vw, 46px); line-height: 1.04; font-weight: 700; letter-spacing: -0.03em; margin: 14px 0 16px; text-wrap: balance; }
.hero .lede { color: var(--ink-2); font-size: 17px; margin: 0 0 22px; max-width: 46ch; }
.hero .lede b { color: var(--ink); }
.cta-row { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.btn {
  display: inline-block; font: 600 15px var(--sans); letter-spacing: -0.01em;
  background: var(--ink); color: var(--paper); text-decoration: none;
  padding: 10px 18px; border: 1.5px solid var(--ink); border-radius: 2px;
}
.btn:hover { background: #000; text-decoration: none; }
.btn-ghost { background: transparent; color: var(--ink); }
.btn-ghost:hover { background: var(--paper-2); }
.hero-meta { margin-top: 20px; font: 11px/1.7 var(--mono); color: var(--ink-3); text-transform: uppercase; letter-spacing: 0.06em; }
.xsec { width: 100%; height: auto; display: block; }

/* ---- sheets ---- */
.sheet { border-top: 1.5px solid var(--ink); padding: 26px 0 44px; }
.sheet-label {
  font: 11px var(--mono); text-transform: uppercase; letter-spacing: 0.14em;
  color: var(--ink-3); margin: 0 0 18px; display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
}
.sheet-label .no { color: var(--accent); font-weight: 700; }
.sheet h2 { font-size: 24px; font-weight: 700; letter-spacing: -0.02em; margin: 0 0 16px; }
.sheet p.sub { color: var(--ink-2); max-width: 62ch; margin: 0 0 20px; }

/* ---- tool panel (shared by DSM tool + calculators) ---- */
.panels { display: flex; gap: 28px; flex-wrap: wrap; align-items: flex-start; }
.panel { flex: 1 1 420px; min-width: 0; }
canvas {
  border: 1.5px solid var(--ink); background: var(--paper-2);
  max-width: 100%; cursor: crosshair; touch-action: none; display: block;
}
button, input[type=file], input[type=number], select { font: inherit; }
button.ctl { padding: 6px 14px; background: var(--paper); border: 1.5px solid var(--ink); border-radius: 2px; cursor: pointer; }
button.ctl:hover:not(:disabled) { background: var(--paper-2); }
button.ctl:disabled { opacity: .4; cursor: default; }
button.primary { background: var(--ink); color: var(--paper); }
button.primary:hover:not(:disabled) { background: #000; }
.controls p { margin: 8px 0; }
input[type=number] { width: 110px; padding: 3px 6px; border: 1px solid var(--rule-2); background: #fff; border-radius: 2px; }
select { padding: 3px 6px; border: 1px solid var(--rule-2); background: #fff; border-radius: 2px; }
input[type=file] { max-width: 100%; }
label { display: inline-block; min-width: 130px; color: var(--ink-2); }

.muted { color: var(--ink-3); font-size: 12px; }
.err { color: var(--accent-2); }

#pilelist { margin: 6px 0; }
#pilelist span { margin-right: 10px; white-space: nowrap; }
.swatch { display: inline-block; width: 10px; height: 10px; border-radius: 2px; margin-right: 4px; vertical-align: middle; }

/* ---- results: survey table ---- */
.okbox { border: 1.5px solid var(--ink); border-radius: 2px; padding: 14px 18px; margin-top: 14px; background: #fff; }
table { border-collapse: collapse; }
td, th { border-bottom: 1px solid var(--rule); padding: 5px 12px 5px 0; text-align: left; font-size: 14.5px; }
th { border-bottom: 1.5px solid var(--ink); font-weight: 600; }
tr:last-child td, tr:last-child th { border-bottom: none; }
.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; font-family: var(--mono); font-size: 13.5px; }
td.muted, .muted td { color: var(--ink-3); }

/* ---- datum methods ---- */
.methods { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }
.method { border: 1px solid var(--rule-2); border-radius: 2px; padding: 14px 16px; background: #fff; }
.method h3 { margin: 0 0 6px; font-size: 15px; font-weight: 600; }
.method p { margin: 0; color: var(--ink-2); font-size: 13.5px; }
.method .tag { font: 10px var(--mono); text-transform: uppercase; letter-spacing: 0.1em; color: var(--accent); display: block; margin-bottom: 6px; }

/* ---- materials index ---- */
.mat-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(210px, 1fr)); gap: 10px; }
a.mat {
  display: block; text-decoration: none; border: 1px solid var(--rule-2); border-radius: 2px;
  padding: 10px 12px; background: #fff; font-size: 14px;
}
a.mat:hover { border-color: var(--ink); }
a.mat .d { display: block; font: 11px var(--mono); color: var(--ink-3); margin-top: 2px; }

.disclaimer { color: var(--ink-3); font-size: 11.5px; margin-top: 10px; }

footer { border-top: 1.5px solid var(--ink); margin-top: 24px; padding: 18px 0 60px; font: 11px/1.7 var(--mono); color: var(--ink-3); text-transform: uppercase; letter-spacing: 0.06em; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }

@media (max-width: 860px) {
  .hero { grid-template-columns: 1fr; padding-top: 36px; }
  .titleblock > div:last-child { margin-left: 0; border-right: none; border-top: 1px solid var(--rule-2); width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}