/* SlabPlanner. Layout: single job-site column, mobile first. Hazard stripe, inputs with a shape diagram, then a dark "delivery ticket" with the answer. */
:root {
  --bg: #E2E3DF;
  --surface: #F3F3F0;
  --field: #FFFFFF;
  --ink: #1B1D1C;
  --muted: #595E5B;
  --line: #C3C6C1;
  --accent: #E35D16;
  --accent-ink: #FFFFFF;
  --stripe: #1B1D1C;
  --ticket-bg: #1F2221;
  --ticket-fg: #F1F1EE;
  --ticket-muted: #A9AEAA;
  --ticket-line: #3B403E;
  --concrete: #B9BBB5;
  --font-display: "Barlow Condensed", "Arial Narrow", "Roboto Condensed", sans-serif;
  --font-body: "Archivo", "Helvetica Neue", Arial, sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #141615; --surface: #1D201F; --field: #252927; --ink: #ECEDE9; --muted: #A2A7A3;
    --line: #363B39; --accent: #FF7A33; --accent-ink: #141615; --stripe: #0A0B0B;
    --ticket-bg: #272B29; --ticket-fg: #F1F1EE; --ticket-muted: #A9AEAA; --ticket-line: #3E4341;
    --concrete: #4A4F4C;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #141615; --surface: #1D201F; --field: #252927; --ink: #ECEDE9; --muted: #A2A7A3;
  --line: #363B39; --accent: #FF7A33; --accent-ink: #141615; --stripe: #0A0B0B;
  --ticket-bg: #272B29; --ticket-fg: #F1F1EE; --ticket-muted: #A9AEAA; --ticket-line: #3E4341;
  --concrete: #4A4F4C;
  color-scheme: dark;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
}
img, svg { max-width: 100%; }
a { color: inherit; }
.stripe {
  height: 10px;
  background: repeating-linear-gradient(-45deg, var(--accent) 0 14px, var(--stripe) 14px 28px);
}
.wrap {
  max-width: 640px;
  margin: 0 auto;
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
}

/* Header and menu */
.site-header { padding-block: 12px 4px; display: flex; align-items: center; justify-content: space-between; gap: 12px; position: relative; }
.brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.5rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  text-decoration: none;
}
.brand span { color: var(--accent); }
.brand:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }
.menu { position: static; }
.menu summary {
  list-style: none;
  cursor: pointer;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border: 2px solid var(--ink);
  border-radius: 8px;
  padding: 6px 12px;
  min-height: 40px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.menu summary::-webkit-details-marker { display: none; }
.menu summary::after { content: ""; width: 7px; height: 7px; border-right: 2px solid currentColor; border-bottom: 2px solid currentColor; transform: translateY(-2px) rotate(45deg); }
.menu[open] summary { background: var(--ink); color: var(--bg); }
.menu summary:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.menu nav {
  position: absolute;
  z-index: 10;
  right: max(16px, env(safe-area-inset-right, 0px));
  left: max(16px, env(safe-area-inset-left, 0px));
  top: calc(100% + 4px);
  background: var(--surface);
  border: 2px solid var(--ink);
  border-radius: 10px;
  padding: 6px;
  display: grid;
  grid-template-columns: 1fr;
  box-shadow: 0 10px 30px color-mix(in srgb, var(--stripe) 25%, transparent);
}
.menu nav a {
  text-decoration: none;
  padding: 11px 12px;
  border-radius: 6px;
  font-weight: 500;
}
.menu nav a:hover, .menu nav a:focus-visible { background: color-mix(in srgb, var(--accent) 14%, transparent); outline: none; }
.menu nav a[aria-current="page"] { color: var(--accent); font-weight: 600; }
@media (min-width: 560px) {
  .menu nav { left: auto; width: 300px; }
}

main.wrap { padding-block: 8px 40px; display: flex; flex-direction: column; gap: 22px; }

h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.3rem, 9vw, 3.1rem);
  line-height: 1;
  margin: 12px 0 8px;
  text-transform: uppercase;
  letter-spacing: 0.01em;
  text-wrap: balance;
}
.lede { margin: 0; color: var(--ink); font-size: 1.05rem; max-width: 52ch; }

/* Calculator card */
.calc {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.modes {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 1fr;
  border: 2px solid var(--ink);
  border-radius: 8px;
  overflow: hidden;
}
.modes input { position: absolute; opacity: 0; pointer-events: none; }
.modes label {
  text-align: center;
  padding: 10px 4px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.05rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  line-height: 1.15;
  cursor: pointer;
  border-left: 2px solid var(--ink);
  display: flex; align-items: center; justify-content: center;
}
.modes label:first-of-type { border-left: 0; }
.modes input:checked + label { background: var(--ink); color: var(--bg); }
.modes input:focus-visible + label { outline: 3px solid var(--accent); outline-offset: -3px; }

.panel { display: flex; flex-direction: column; gap: 14px; }
.diagram { display: block; width: 100%; max-width: 100%; height: auto; max-height: 130px; }
.diagram .fill { fill: var(--concrete); }
.diagram .fill2 { fill: var(--concrete); opacity: .75; }
.diagram .fill3 { fill: var(--concrete); opacity: .6; }
.diagram .edge { fill: none; stroke: var(--ink); stroke-width: 2; stroke-linejoin: round; }
.diagram .dim { stroke: var(--accent); stroke-width: 1.5; fill: none; }
.diagram text { fill: var(--accent); font: 700 15px var(--font-display); letter-spacing: 0.03em; }
.diagram .soil { fill: var(--line); }
.diagram .post { fill: var(--muted); }

.field-label {
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: 6px;
  display: block;
}
.field-label i { font-style: normal; color: var(--accent); }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.unit-box { position: relative; }
.unit-box input, .calc select {
  width: 100%;
  font: 600 1.35rem var(--font-body);
  font-variant-numeric: tabular-nums;
  color: var(--ink);
  background: var(--field);
  border: 1.5px solid var(--line);
  border-radius: 8px;
  padding: 12px 44px 12px 14px;
  min-height: 56px;
  appearance: none;
  -webkit-appearance: none;
}
.unit-box.money input { padding-left: 28px; }
.unit-box .pre {
  position: absolute; left: 14px; top: 50%; transform: translateY(-50%);
  color: var(--muted); font-weight: 600; font-size: 1.2rem; pointer-events: none;
}
.calc select { font-size: 1.05rem; padding-right: 36px; cursor: pointer; }
.select-box { position: relative; }
.select-box::after {
  content: "";
  position: absolute; right: 16px; top: 50%;
  width: 8px; height: 8px;
  border-right: 2px solid var(--muted); border-bottom: 2px solid var(--muted);
  transform: translateY(-70%) rotate(45deg);
  pointer-events: none;
}
.unit-box .unit {
  position: absolute; right: 14px; top: 50%; transform: translateY(-50%);
  color: var(--muted); font-weight: 500; pointer-events: none; font-size: 0.95rem;
}
.unit-box input:focus, .calc select:focus { outline: 3px solid var(--accent); outline-offset: 1px; border-color: var(--accent); }
.hint { font-size: 0.82rem; color: var(--muted); margin-top: 6px; }

.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.chip {
  appearance: none;
  border: 1.5px solid var(--line);
  background: var(--field);
  color: var(--ink);
  border-radius: 999px;
  padding: 7px 12px;
  font: 500 0.88rem var(--font-body);
  cursor: pointer;
  min-height: 36px;
}
.chip[aria-pressed="true"] { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 14%, var(--field)); }
.chip:focus-visible { outline: 3px solid var(--accent); outline-offset: 1px; }
.suggest {
  appearance: none;
  border: 1.5px dashed var(--accent);
  background: transparent;
  color: var(--ink);
  border-radius: 8px;
  padding: 10px 12px;
  font: 600 0.92rem var(--font-body);
  cursor: pointer;
  text-align: left;
  min-height: 44px;
}
.suggest:focus-visible { outline: 3px solid var(--accent); outline-offset: 1px; }

.extras { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; padding-top: 14px; border-top: 1px dashed var(--line); }
.extras.one { grid-template-columns: 1fr; }

.prices { border-top: 1px dashed var(--line); padding-top: 12px; }
.prices summary {
  cursor: pointer; list-style: none; display: flex; justify-content: space-between; align-items: center;
  font-size: 0.78rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted);
  min-height: 32px;
}
.prices summary::-webkit-details-marker { display: none; }
.prices summary::after { content: "+"; font-family: var(--font-display); font-size: 1.5rem; color: var(--accent); }
.prices[open] summary::after { content: "–"; }
.prices summary:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.prices .row { margin-top: 10px; }

.calc-btn {
  appearance: none;
  border: 0;
  background: var(--accent);
  color: var(--accent-ink);
  font: 700 1.35rem var(--font-display);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: 8px;
  min-height: 58px;
  cursor: pointer;
  box-shadow: 0 3px 0 color-mix(in srgb, var(--accent) 55%, var(--stripe));
}
.calc-btn:active { transform: translateY(2px); box-shadow: 0 1px 0 color-mix(in srgb, var(--accent) 55%, var(--stripe)); }
.calc-btn:focus-visible { outline: 3px solid var(--ink); outline-offset: 2px; }

/* Result ticket */
.ticket {
  background: var(--ticket-bg);
  color: var(--ticket-fg);
  border-radius: 10px;
  padding: 18px 16px 16px;
  border-top: 6px solid var(--accent);
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.ticket:focus { outline: none; }
.ticket-head { display: flex; justify-content: space-between; align-items: baseline; gap: 8px; flex-wrap: wrap; }
.ticket-label { font-size: 0.78rem; font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ticket-muted); }
.big {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(3.4rem, 17vw, 5rem);
  line-height: 0.9;
  font-variant-numeric: tabular-nums;
  color: var(--accent);
  overflow-wrap: anywhere;
}
.big small { font-size: 0.42em; color: var(--ticket-fg); margin-left: 6px; letter-spacing: 0.02em; }
.sub { color: var(--ticket-muted); font-size: 0.92rem; margin-top: 6px; }
.bags { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--ticket-line); }
.bag { padding: 12px 4px 10px; display: flex; flex-direction: column; gap: 2px; border-bottom: 1px solid var(--ticket-line); }
.bag:nth-child(even) { border-left: 1px solid var(--ticket-line); padding-left: 14px; }
.bag b {
  font-family: var(--font-display);
  font-size: 2.1rem;
  font-weight: 700;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}
.bag span { font-size: 0.8rem; color: var(--ticket-muted); }
.facts { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.fact { background: color-mix(in srgb, var(--ticket-fg) 7%, transparent); border-radius: 6px; padding: 10px 12px; min-width: 0; }
.fact span { display: block; font-size: 0.72rem; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ticket-muted); }
.fact b { font-family: var(--font-display); font-size: 1.45rem; font-weight: 700; font-variant-numeric: tabular-nums; }
.fact.wide { grid-column: 1 / -1; }
.fact em { font-style: normal; font-size: 0.85rem; color: var(--ticket-muted); }
.warn { color: var(--accent); font-weight: 600; font-size: 0.92rem; }
.copy {
  appearance: none;
  border: 2px solid var(--accent);
  background: transparent;
  color: var(--ticket-fg);
  font: 600 1.05rem var(--font-display);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-radius: 8px;
  min-height: 48px;
  cursor: pointer;
}
.copy:hover { background: color-mix(in srgb, var(--accent) 18%, transparent); }
.copy:focus-visible { outline: 3px solid var(--ticket-fg); outline-offset: 2px; }
.copy-text { width: 100%; min-height: 120px; font: 0.85rem var(--font-body); background: var(--ticket-bg); color: var(--ticket-fg); border: 1px solid var(--ticket-line); border-radius: 6px; padding: 8px; }

/* Ad placeholder: replace with the ad code when the site is approved */
.ad {
  border: 1.5px dashed var(--line);
  border-radius: 8px;
  min-height: 110px;
  display: grid;
  place-items: center;
  color: var(--muted);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/* Content */
.content { display: flex; flex-direction: column; gap: 26px; }
h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.75rem;
  text-transform: uppercase;
  line-height: 1.05;
  margin: 0 0 8px;
  text-wrap: balance;
}
.content p { margin: 0 0 10px; max-width: 65ch; }
.content ul { margin: 0; padding-left: 20px; display: flex; flex-direction: column; gap: 6px; max-width: 65ch; }
.formula {
  background: var(--surface);
  border-left: 4px solid var(--accent);
  padding: 12px 14px;
  font-variant-numeric: tabular-nums;
  border-radius: 0 6px 6px 0;
  overflow-x: auto;
  margin-bottom: 10px;
}
.formula div + div { margin-top: 4px; }
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 8px; }
table { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; min-width: 300px; }
th, td { padding: 10px 12px; text-align: right; border-bottom: 1px solid var(--line); }
th:first-child, td:first-child { text-align: left; }
th { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); background: var(--surface); font-weight: 600; }
tr:last-child td { border-bottom: 0; }
.caption { font-size: 0.82rem; color: var(--muted); margin-top: 8px; }

.faq details { border-bottom: 1px solid var(--line); padding: 12px 0; }
.faq details:first-of-type { border-top: 1px solid var(--line); }
.faq summary { cursor: pointer; font-weight: 600; list-style: none; display: flex; justify-content: space-between; gap: 12px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-family: var(--font-display); font-size: 1.4rem; line-height: 1; color: var(--accent); }
.faq details[open] summary::after { content: "–"; }
.faq summary:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.faq details p { margin: 8px 0 0; color: var(--muted); }

.related { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.related a {
  text-decoration: none;
  border: 1.5px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  font-weight: 600;
  font-size: 0.95rem;
  line-height: 1.3;
  background: var(--surface);
  min-width: 0;
}
.related a span { display: block; font-weight: 400; font-size: 0.8rem; color: var(--muted); margin-top: 2px; }
.related a:hover { border-color: var(--accent); }
.related a:focus-visible { outline: 3px solid var(--accent); outline-offset: 1px; }

.site-footer { padding-block: 18px 28px; border-top: 1px solid var(--line); color: var(--muted); font-size: 0.82rem; display: flex; flex-direction: column; gap: 8px; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 4px 14px; }
.site-footer a { color: var(--muted); }

@media (min-width: 560px) {
  .calc { padding: 22px; }
  .ticket { padding: 22px; }
  .bags { grid-template-columns: repeat(4, 1fr); }
  .bag { border-bottom: 0; }
  .bag + .bag { border-left: 1px solid var(--ticket-line); padding-left: 14px; }
  .related { grid-template-columns: 1fr 1fr 1fr; }
}