/* Copyright 2024 Graz University of Technology -- GPL-3.0 */

:root {
  --bg: #f4f2ee;
  --panel: #ffffff;
  --ink: #222;
  --muted: #6b6b6b;
  --accent: #8a6d3b;
  --accent-dark: #6d5430;
  --border: #ddd8cf;
  --govern: #b5462f;
}

* { box-sizing: border-box; }

.print-only { display: none; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.5;
}

header, footer {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1.5rem 1.5rem 0;
}

header h1 {
  font-size: 1.4rem;
  margin: 0 0 .3rem;
}

.subtitle { color: var(--muted); margin: 0; max-width: 60ch; }

main {
  max-width: 1100px;
  margin: 1.5rem auto;
  padding: 0 1.5rem;
  display: grid;
  grid-template-columns: 340px 1fr 360px;
  gap: 1.25rem;
  align-items: start;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.1rem 1.2rem 1.3rem;
}

.panel h2 {
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: .04em;
  color: var(--accent-dark);
  margin: 0 0 .9rem;
}

/* inputs */
.inputs label {
  display: block;
  font-size: .82rem;
  font-weight: 600;
  margin: .8rem 0 .25rem;
}
.inputs label:first-of-type { margin-top: 0; }
.inputs .unit { font-weight: 400; color: var(--muted); }

.inputs select,
.inputs input {
  width: 100%;
  padding: .5rem .6rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: .95rem;
  background: #fff;
}

/* box-constraint (variable bounds) fields */
.bounds {
  margin: 1.1rem 0 0;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: .5rem .7rem .7rem;
}
.bounds legend {
  font-size: .82rem;
  font-weight: 600;
  padding: 0 .3rem;
}
.bound-head,
.bound-row {
  display: grid;
  grid-template-columns: 1fr 4rem 4rem 4rem;
  gap: .4rem;
  align-items: center;
}
.bound-head {
  font-size: .7rem;
  color: var(--muted);
  text-align: center;
  margin-bottom: .3rem;
}
.bound-row + .bound-row { margin-top: .35rem; }
.bounds .bound-row label {
  display: block;
  font-size: .78rem;
  font-weight: 500;
  margin: 0;
}
.bounds input {
  width: 100%;
  padding: .3rem .35rem;
  border: 1px solid var(--border);
  border-radius: 5px;
  font-size: .85rem;
  background: #fff;
}
/* raster on/off toggle inside the bounds fieldset */
.bounds button.toggle {
  width: 100%;
  margin: .1rem 0 .7rem;
  padding: .4rem .6rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #fff;
  font-size: .82rem;
  font-weight: 600;
  color: #333;
  text-align: left;
  cursor: pointer;
}
.bounds button.toggle::before { content: "○ "; }
.bounds button.toggle[aria-pressed="true"] {
  border-color: var(--accent);
  background: #f6f1e7;
  color: var(--accent-dark);
}
.bounds button.toggle[aria-pressed="true"]::before { content: "● "; }
/* dim the Schritt column while the raster is off */
.bounds:not(.raster-on) .bound-head span:last-child,
.bounds:not(.raster-on) .bnd-step { opacity: .4; }

button#calc {
  margin-top: 1.3rem;
  width: 100%;
  padding: .65rem;
  border: 0;
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
}
button#calc:hover:not(:disabled) { background: var(--accent-dark); }
button#calc:disabled { opacity: .55; cursor: progress; }

.pdf-btn {
  margin-top: 1rem;
  width: 100%;
  padding: .55rem;
  border: 1px solid var(--accent);
  border-radius: 6px;
  background: #fff;
  color: var(--accent-dark);
  font-size: .92rem;
  font-weight: 600;
  cursor: pointer;
}
.pdf-btn:hover { background: #f6f1e7; }

.status {
  margin: .9rem 0 0;
  font-size: .8rem;
  color: var(--muted);
}
.status.ready { color: #2e7d32; }
.status.error { color: var(--govern); }

/* results */
.result-empty { color: var(--muted); }

.results .info { margin: 0 0 .6rem; color: var(--muted); }

.dims {
  list-style: none;
  margin: 0 0 .8rem;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
}
.dims li {
  background: #f6f1e7;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: .35rem .6rem;
}
.dims li span { display: block; font-size: .72rem; color: var(--muted); }
.dims li b { font-size: 1rem; }

.desc { margin: .4rem 0 1rem; }
.props { margin: .2rem 0 1rem; }

.results h3 {
  font-size: .85rem;
  text-transform: uppercase;
  letter-spacing: .03em;
  color: var(--accent-dark);
  margin: 1rem 0 .5rem;
}

table.util { width: 100%; border-collapse: collapse; }
table.util td { padding: .3rem .4rem; vertical-align: middle; font-size: .9rem; }
table.util td:first-child { white-space: nowrap; }
.bar-cell { width: 100%; }
.bar {
  display: block;
  height: 12px;
  background: #eee6d8;
  border-radius: 6px;
  overflow: hidden;
}
.bar-fill {
  display: block;
  height: 100%;
  background: var(--accent);
}
tr.governing .bar-fill { background: var(--govern); }
tr.governing { font-weight: 600; }
.pct { text-align: right; white-space: nowrap; }

.error { color: var(--govern); font-weight: 600; }
.msg { color: var(--muted); font-size: .85rem; }

.warn {
  background: #fbf3e0;
  border: 1px solid #e6c478;
  border-radius: 6px;
  padding: .55rem .7rem;
  margin: 0 0 .8rem;
  color: #8a5a00;
  font-size: .88rem;
}
.warn b { color: #7a4f00; }

/* drawing */
.drawing canvas {
  width: 100%;
  height: auto;
  background: #fbfaf7;
  border: 1px solid var(--border);
  border-radius: 6px;
}
.drawing canvas + h2 { margin-top: 1.1rem; }

footer {
  color: var(--muted);
  font-size: .82rem;
  padding-bottom: 2rem;
}
footer a { color: var(--accent-dark); }
footer .note { margin-top: .2rem; }

@media (max-width: 900px) {
  main { grid-template-columns: 1fr; }
}

/* ---- print / save-as-PDF report ------------------------------------- */
@media print {
  body { background: #fff; }
  header, footer, main {
    max-width: none;
    margin: 0;
    padding: 0;
  }
  header { padding-bottom: .5rem; border-bottom: 1px solid #999; }
  main {
    display: block;
    margin-top: 1rem;
  }

  /* hide interactive chrome */
  .inputs, #status, .pdf-btn, button#calc { display: none !important; }
  .print-only { display: block; }
  .print-date { color: #444; font-size: .85rem; margin: .3rem 0 0; }

  /* flatten panels into report sections */
  .panel {
    border: none;
    border-radius: 0;
    padding: 0;
    margin: 0 0 1rem;
    break-inside: avoid;
  }
  .panel h2, .results h3, .panel h2 { color: #000; }

  /* keep utilisation-bar and wood colours when printing */
  .bar, .bar-fill, tr.governing .bar-fill, canvas {
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }
  .drawing canvas {
    border: 1px solid #ccc;
    max-width: 80mm;
  }
}