/* ============================================================
   Hanging Bike Rack calculator — drafting-table plan sheet look
   ============================================================ */

:root {
  --paper: #f2ecdc;
  --paper-deep: #eae1c8;
  --grid: rgba(35, 83, 158, 0.10);
  --grid-major: rgba(35, 83, 158, 0.16);
  --ink: #22303a;
  --ink-soft: #57646d;
  --blue: #23539e;
  --blue-deep: #173a70;
  --orange: #d95d1e;
  --orange-soft: #f5e3d4;
  --line: rgba(34, 48, 58, 0.28);
  --sheet: #faf6ea;
  --font-display: "Big Shoulders Display", "Arial Narrow", sans-serif;
  --font-body: "IBM Plex Sans", "Helvetica Neue", sans-serif;
  --font-mono: "IBM Plex Mono", "Courier New", monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  background-color: var(--paper);
  background-image:
    linear-gradient(var(--grid-major) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-major) 1px, transparent 1px),
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 120px 120px, 120px 120px, 24px 24px, 24px 24px;
}

a { color: var(--blue); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { color: var(--orange); }

/* ---------- masthead ---------- */

.masthead {
  border-bottom: 3px solid var(--ink);
  background:
    repeating-linear-gradient(-45deg,
      transparent 0 26px,
      rgba(217, 93, 30, 0.08) 26px 30px);
}

.masthead-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 40px 24px 30px;
}

.masthead-kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--orange);
  margin: 0 0 6px;
}

.masthead h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(52px, 8vw, 96px);
  line-height: 0.92;
  letter-spacing: 0.01em;
  text-transform: uppercase;
  margin: 0 0 12px;
  color: var(--ink);
}

.masthead-sub {
  max-width: 60ch;
  margin: 0;
  color: var(--ink-soft);
}

/* ---------- layout ---------- */

.layout {
  max-width: 1180px;
  margin: 34px auto 80px;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 330px 1fr;
  gap: 28px;
  align-items: start;
}

/* let grid items shrink below their content (tables would otherwise
   force the whole column wide and cause page-level horizontal scroll) */
.layout > * { min-width: 0; }

@media (max-width: 880px) {
  .layout { grid-template-columns: 1fr; }
  .inputs { position: static !important; }
}

/* ---------- input panel ---------- */

.panel {
  border: 2px solid var(--ink);
  background: var(--sheet);
  box-shadow: 6px 6px 0 rgba(34, 48, 58, 0.18);
}

.inputs { position: sticky; top: 18px; }

.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 14px 18px;
  border-bottom: 2px solid var(--ink);
  background: var(--paper-deep);
}

h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 24px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  margin: 0;
}

h3 {
  font-family: var(--font-display);
  font-size: 19px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin: 0 0 8px;
}

.unit-toggle {
  display: flex;
  border: 2px solid var(--ink);
  background: var(--sheet);
}

.unit-toggle button {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  padding: 4px 12px;
  border: none;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
}

.unit-toggle button.active {
  background: var(--ink);
  color: var(--sheet);
}

#bike-form { padding: 16px 18px 4px; }

.field { margin-bottom: 16px; }

label {
  display: block;
  font-weight: 600;
  font-size: 14px;
  margin-bottom: 4px;
}

.hint {
  font-weight: 400;
  font-size: 12.5px;
  color: var(--ink-soft);
  margin: 4px 0 0;
}

.unit-suffix {
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 12px;
  color: var(--orange);
}

input[type="number"], select {
  width: 100%;
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--ink);
  padding: 8px 10px;
  border: 2px solid var(--line);
  border-radius: 0;
  background: #fff;
}

input[type="number"]:focus, select:focus,
.unit-toggle button:focus-visible, #print-btn:focus-visible {
  outline: 3px solid var(--orange);
  outline-offset: 1px;
}

.field-error {
  margin: 4px 0 0;
  font-size: 12.5px;
  font-weight: 600;
  color: #a4300a;
  min-height: 0;
}
.field-error:empty { display: none; }

input.invalid { border-color: #a4300a; background: #fbeee7; }

fieldset.optional {
  border: 1px dashed var(--line);
  padding: 12px 14px 2px;
  margin: 4px 0 16px;
}

fieldset.optional legend {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
  padding: 0 6px;
}

.print-row { padding: 0 18px 18px; }

#print-btn {
  width: 100%;
  font-family: var(--font-display);
  font-size: 20px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 10px;
  border: 2px solid var(--ink);
  background: var(--orange);
  color: #fff;
  cursor: pointer;
  box-shadow: 3px 3px 0 var(--ink);
  transition: transform 80ms ease, box-shadow 80ms ease;
}
#print-btn:hover { transform: translate(-1px, -1px); box-shadow: 4px 4px 0 var(--ink); }
#print-btn:active { transform: translate(2px, 2px); box-shadow: 1px 1px 0 var(--ink); }

/* ---------- plan sheet (results) ---------- */

.sheet {
  border: 2px solid var(--ink);
  background: var(--sheet);
  box-shadow: 6px 6px 0 rgba(34, 48, 58, 0.18);
  padding: 6px 0 0;
}

.sheet-block {
  padding: 20px 26px 8px;
  border-bottom: 1px solid var(--line);
}

.sheet-block h2 { color: var(--blue-deep); margin-bottom: 12px; }

.not-to-scale {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.15em;
  color: var(--ink-soft);
  vertical-align: middle;
}

/* summary */

.summary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 10px;
  padding-bottom: 14px;
}

.summary-card {
  border: 1px solid var(--line);
  border-left: 4px solid var(--orange);
  padding: 8px 12px;
  background: #fff;
}

.summary-card .k {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-soft);
  display: block;
}

.summary-card .v {
  font-family: var(--font-mono);
  font-size: 21px;
  font-weight: 600;
  color: var(--blue-deep);
}

/* warnings */

#warnings:not(:empty) { padding: 18px 26px 0; }

.warning {
  border: 2px solid var(--orange);
  background: var(--orange-soft);
  padding: 10px 14px;
  margin-bottom: 10px;
  font-weight: 500;
}

.warning::before {
  content: "⚠ ";
  color: var(--orange);
  font-weight: 700;
}

/* diagram */

#diagram { padding-bottom: 16px; }
#diagram svg { width: 100%; height: auto; display: block; }

/* cut list table */

.table-wrap { overflow-x: auto; }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
  background: #fff;
}

th {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-align: left;
  background: var(--ink);
  color: var(--sheet);
  padding: 7px 10px;
}

td {
  border: 1px solid var(--line);
  padding: 7px 10px;
  vertical-align: top;
}

td.dim { font-family: var(--font-mono); font-weight: 600; white-space: nowrap; color: var(--blue-deep); }
td.num { font-family: var(--font-mono); text-align: center; }

tbody tr:nth-child(even) { background: rgba(35, 83, 158, 0.045); }

.fine { font-size: 12.5px; color: var(--ink-soft); margin: 8px 0 14px; }

/* materials / tools */

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  padding-bottom: 14px;
}
@media (max-width: 640px) { .two-col { grid-template-columns: 1fr; } }

.checklist {
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 14.5px;
}

.checklist li {
  padding: 6px 0 6px 26px;
  position: relative;
  border-bottom: 1px dotted var(--line);
}

.checklist li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 9px;
  width: 12px;
  height: 12px;
  border: 2px solid var(--blue);
}

.checklist .qty { font-family: var(--font-mono); font-weight: 600; color: var(--orange); }
.checklist .note { color: var(--ink-soft); font-size: 12.5px; }

/* steps */

.steps {
  counter-reset: step;
  list-style: none;
  margin: 0 0 14px;
  padding: 0;
}

.steps li {
  counter-increment: step;
  position: relative;
  padding: 10px 0 10px 52px;
  border-bottom: 1px dotted var(--line);
}

.steps li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 24px;
  color: var(--orange);
}

.steps b, .steps strong { color: var(--blue-deep); font-family: var(--font-mono); font-size: 15px; }

.steps .substep { color: var(--ink-soft); font-size: 13.5px; display: block; margin-top: 2px; }

/* mounting heights card */

#mounting-heights:not(:empty) {
  margin: 0 0 18px;
}

.heights-card {
  border: 2px solid var(--blue);
  background: rgba(35, 83, 158, 0.06);
  padding: 12px 16px;
}

.heights-card h4 {
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 17px;
  margin: 0 0 6px;
  color: var(--blue-deep);
}

.heights-card table { background: transparent; font-family: var(--font-mono); }
.heights-card td { border: none; padding: 3px 14px 3px 0; }
.heights-card td:last-child { font-weight: 600; color: var(--blue-deep); }

/* title block */

.title-block {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  border-top: 2px solid var(--ink);
  background: var(--paper-deep);
  font-size: 12.5px;
}

.title-block > div {
  padding: 10px 14px;
  border-right: 1px solid var(--line);
}

.title-block span {
  display: block;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

/* SVG dimension styling (referenced from generated markup) */

.svg-wood { fill: #e5cf9f; stroke: var(--ink); stroke-width: 1.5; }
.svg-wood-dark { fill: #d3b878; stroke: var(--ink); stroke-width: 1.5; }
.svg-wall { stroke: var(--ink); stroke-width: 2; }
.svg-hatch { stroke: var(--ink-soft); stroke-width: 1; }
.svg-tire { fill: none; stroke: var(--ink); stroke-width: 6; opacity: 0.75; }
.svg-rim { fill: none; stroke: var(--ink-soft); stroke-width: 1.5; }
.svg-dim { stroke: var(--blue); stroke-width: 1; fill: none; }
.svg-dim-text {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  fill: var(--blue-deep);
}
.svg-label {
  font-family: var(--font-mono);
  font-size: 11px;
  fill: var(--ink-soft);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.svg-hinge { fill: #9aa5ad; stroke: var(--ink); stroke-width: 1; }

/* ---------- print ---------- */

@media print {
  body { background: #fff; }
  .masthead, .inputs, #print-btn { display: none; }
  .layout { display: block; margin: 0; padding: 0; max-width: none; }
  .sheet, .panel { box-shadow: none; border-width: 1px; }
  .sheet-block { break-inside: avoid; }
}