/* ============================================================
   FreightMath — design system
   Palette: warm paper + deep harbor navy + safety orange.
   Type: Space Grotesk (display) / Inter (UI & body).
   ============================================================ */

@font-face {
  font-family: "Space Grotesk";
  src: url("/assets/fonts/SpaceGrotesk-var.ttf") format("truetype-variations");
  font-weight: 300 700;
  font-style: normal;
  font-display: swap;
}

:root {
  --ink: #12222f;
  --ink-2: #45586a;
  --muted: #6b7c8c;
  --bg: #f7f6f2;
  --bg-2: #efeee7;
  --card: #ffffff;
  --line: #e4e3da;
  --line-2: #d5d4c9;
  --accent: #e85d26;
  --accent-hot: #cf4c1a;
  --accent-soft: #fdece2;
  --accent-ink: #8a3413;
  --steel: #1d5b79;
  --steel-hot: #14455d;
  --steel-soft: #e3eef4;
  --dark: #0d1b26;
  --dark-2: #122534;
  --dark-line: #24384a;
  --dark-text: #b9c8d4;
  --good: #1f7a5c;
  --good-soft: #e2f2ec;
  --warn-soft: #fdf3e2;
  --warn-ink: #8a5a13;
  --radius: 14px;
  --radius-sm: 9px;
  --shadow: 0 1px 2px rgba(18, 34, 47, 0.05), 0 8px 28px -12px rgba(18, 34, 47, 0.16);
  --shadow-sm: 0 1px 2px rgba(18, 34, 47, 0.07);
  --font-display: "Space Grotesk", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-body: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --w-wide: 1120px;
  --w-prose: 46rem;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16.5px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  line-height: 1.14;
  letter-spacing: -0.015em;
  color: var(--ink);
  margin: 0 0 0.5em;
  text-wrap: balance;
}
h1 { font-size: clamp(2.1rem, 4.6vw, 3.3rem); font-weight: 700; }
h2 { font-size: clamp(1.5rem, 2.8vw, 2.1rem); font-weight: 700; margin-top: 0; }
h3 { font-size: 1.22rem; font-weight: 600; }
p { margin: 0 0 1em; }
a { color: var(--steel); text-decoration-thickness: 1px; text-underline-offset: 2.5px; }
a:hover { color: var(--steel-hot); }
img, svg, canvas { max-width: 100%; }
::selection { background: #f8cdb4; }

.wrap { max-width: var(--w-wide); margin: 0 auto; padding: 0 22px; }
.prose { max-width: var(--w-prose); }
.overline {
  font-family: var(--font-body);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 0.9em;
}
.sub { color: var(--ink-2); font-size: 1.1rem; max-width: 44rem; }
.small { font-size: 0.88rem; color: var(--muted); }
.num { font-variant-numeric: tabular-nums; }

/* ---------- top nav ---------- */
.topnav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(247, 246, 242, 0.86);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.topnav .wrap { display: flex; align-items: center; gap: 26px; height: 62px; }
.brand { display: flex; align-items: center; gap: 10px; font-family: var(--font-display); font-weight: 700; font-size: 1.13rem; color: var(--ink); text-decoration: none; letter-spacing: -0.01em; }
.brand svg { display: block; }
.navlinks { display: flex; gap: 22px; margin-left: 6px; align-items: center; }
.navlinks a { font-size: 0.94rem; font-weight: 500; color: var(--ink-2); text-decoration: none; padding: 4px 0; }
.navlinks a:hover, .navlinks a[aria-current="page"] { color: var(--ink); }
.navlinks a[aria-current="page"] { box-shadow: inset 0 -2px 0 var(--accent); }
.nav-cta { margin-left: auto; }
.nav-burger { display: none; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  background: var(--accent); color: #fff !important;
  font-weight: 600; font-size: 0.97rem; font-family: var(--font-body);
  padding: 11px 20px; border-radius: var(--radius-sm);
  border: none; cursor: pointer; text-decoration: none;
  box-shadow: 0 1px 2px rgba(207, 76, 26, 0.35), inset 0 1px 0 rgba(255,255,255,0.18);
  transition: background 0.15s, transform 0.05s;
}
.btn:hover { background: var(--accent-hot); }
.btn:active { transform: translateY(1px); }
.btn-ghost {
  background: transparent; color: var(--ink) !important;
  border: 1px solid var(--line-2); box-shadow: none;
}
.btn-ghost:hover { background: var(--card); border-color: var(--muted); }
.btn-dark { background: var(--ink); box-shadow: none; }
.btn-dark:hover { background: #000; }
.btn-sm { padding: 8px 14px; font-size: 0.88rem; }
.btn-lg { padding: 14px 26px; font-size: 1.05rem; }

/* ---------- hero ---------- */
.hero { padding: 58px 0 8px; position: relative; }
.hero-grid-bg {
  position: absolute; inset: 0; pointer-events: none;
  background-image: radial-gradient(var(--line-2) 1px, transparent 1px);
  background-size: 26px 26px;
  mask-image: linear-gradient(180deg, rgba(0,0,0,0.5), transparent 75%);
  -webkit-mask-image: linear-gradient(180deg, rgba(0,0,0,0.5), transparent 75%);
}
.hero .wrap { position: relative; }
.trust-row { display: flex; flex-wrap: wrap; gap: 10px 22px; margin: 18px 0 6px; font-size: 0.88rem; color: var(--ink-2); }
.trust-row span { display: inline-flex; gap: 7px; align-items: center; }
.trust-row svg { color: var(--good); flex: none; }

/* ---------- calculator ---------- */
.calc-zone { padding: 26px 0 30px; }
.calc-grid { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(300px, 0.9fr); gap: 22px; align-items: start; }
.card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow);
}
.card-pad { padding: 22px; }
.card-head { display: flex; align-items: center; justify-content: space-between; gap: 14px; flex-wrap: wrap; padding: 16px 22px; border-bottom: 1px solid var(--line); }
.card-head h2, .card-head h3 { margin: 0; font-size: 1.02rem; }

.seg { display: inline-flex; background: var(--bg-2); border: 1px solid var(--line); border-radius: 9px; padding: 3px; gap: 2px; }
.seg button {
  border: none; background: transparent; cursor: pointer;
  font: 600 0.84rem var(--font-body); color: var(--ink-2);
  padding: 6px 12px; border-radius: 6.5px; white-space: nowrap;
}
.seg button[aria-pressed="true"] { background: var(--card); color: var(--ink); box-shadow: var(--shadow-sm); }

.rows { display: flex; flex-direction: column; gap: 12px; padding: 18px 22px 6px; }
.unit-row {
  display: grid; gap: 8px; align-items: end;
  grid-template-columns: 64px repeat(3, minmax(0,1fr)) minmax(0,1.15fr) 34px;
  padding: 12px; border: 1px solid var(--line); border-radius: 11px; background: #fdfdfb;
}
.field label { display: block; font-size: 0.72rem; font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase; color: var(--muted); margin: 0 0 4px 2px; }
.field input, .field select {
  width: 100%; border: 1px solid var(--line-2); border-radius: 8px;
  padding: 9px 10px; font: 500 0.98rem var(--font-body); color: var(--ink);
  background: #fff; font-variant-numeric: tabular-nums;
}
.field input:focus, .field select:focus { outline: 2px solid var(--accent); outline-offset: -1px; border-color: var(--accent); }
.row-x {
  border: none; background: transparent; cursor: pointer; color: var(--muted);
  font-size: 1.1rem; line-height: 1; padding: 8px 4px; border-radius: 6px; align-self: center;
}
.row-x:hover { color: var(--accent-hot); background: var(--accent-soft); }
.rows-actions { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; padding: 10px 22px 18px; }
.add-row { background: none; border: 1.5px dashed var(--line-2); color: var(--steel); font: 600 0.92rem var(--font-body); padding: 9px 16px; border-radius: 9px; cursor: pointer; }
.add-row:hover { border-color: var(--steel); background: var(--steel-soft); }
.adv { padding: 0 22px 18px; }
.adv summary { cursor: pointer; font-size: 0.9rem; font-weight: 600; color: var(--ink-2); user-select: none; }
.adv-body { display: flex; gap: 16px; flex-wrap: wrap; padding-top: 12px; align-items: end; }
.adv-body .field { min-width: 150px; }
.check { display: inline-flex; align-items: center; gap: 8px; font-size: 0.92rem; color: var(--ink-2); }
.check input { width: 16px; height: 16px; accent-color: var(--accent); }

/* results */
.results { position: sticky; top: 78px; }
.result-hero { padding: 22px 22px 16px; border-bottom: 1px solid var(--line); }
.result-hero .overline { margin-bottom: 4px; }
.class-line { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; }
.class-big { font-family: var(--font-display); font-weight: 700; font-size: 3.4rem; letter-spacing: -0.03em; color: var(--ink); line-height: 1; }
.class-big .cls { color: var(--accent); }
.scale-note { font-size: 0.82rem; color: var(--muted); }
.stat-grid { display: grid; grid-template-columns: 1fr 1fr; }
.stat { padding: 14px 22px; border-bottom: 1px solid var(--line); }
.stat:nth-child(odd) { border-right: 1px solid var(--line); }
.stat b { display: block; font: 700 1.28rem var(--font-display); color: var(--ink); font-variant-numeric: tabular-nums; letter-spacing: -0.01em; }
.stat span { font-size: 0.78rem; font-weight: 600; letter-spacing: 0.05em; text-transform: uppercase; color: var(--muted); }
.nudge { margin: 14px 18px; padding: 12px 14px; border-radius: 10px; background: var(--warn-soft); color: var(--warn-ink); font-size: 0.9rem; line-height: 1.5; }
.nudge.good { background: var(--good-soft); color: var(--good); }
.nudge b { font-variant-numeric: tabular-nums; }
.result-actions { display: flex; gap: 10px; padding: 6px 18px 18px; flex-wrap: wrap; }
.copied { color: var(--good) !important; border-color: var(--good) !important; }

/* 3D viewer */
.viewer-card { margin-top: 22px; background: var(--dark); border-radius: var(--radius); border: 1px solid var(--dark-line); overflow: hidden; box-shadow: var(--shadow); }
.viewer-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; padding: 14px 20px; border-bottom: 1px solid var(--dark-line); }
.viewer-head h2 { color: #fff; font-size: 1rem; margin: 0; }
.viewer-head .small { color: var(--dark-text); }
#pallet3d { position: relative; height: 420px; background:
  radial-gradient(ellipse 75% 65% at 50% 42%, #1a3145 0%, var(--dark) 72%); }
#pallet3d canvas { display: block; outline: none; touch-action: none; }
.viewer-legend { display: flex; gap: 14px; flex-wrap: wrap; padding: 12px 20px; border-top: 1px solid var(--dark-line); }
.viewer-legend span { display: inline-flex; align-items: center; gap: 7px; font-size: 0.82rem; color: var(--dark-text); font-variant-numeric: tabular-nums; }
.viewer-legend i { width: 11px; height: 11px; border-radius: 3px; display: inline-block; }
.viewer-fallback { display: flex; align-items: center; justify-content: center; height: 100%; color: var(--dark-text); padding: 20px; text-align: center; }

/* ---------- content sections ---------- */
.section { padding: 54px 0; }
.section-alt { background: var(--bg-2); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section .prose h2 { margin-top: 1.6em; }
.section .prose h2:first-child { margin-top: 0; }

.tablewrap { overflow-x: auto; margin: 1.2em 0; border: 1px solid var(--line); border-radius: 11px; background: var(--card); box-shadow: var(--shadow-sm); }
table.data { border-collapse: collapse; width: 100%; font-size: 0.95rem; }
table.data th {
  text-align: left; font: 600 0.78rem var(--font-body); letter-spacing: 0.05em; text-transform: uppercase;
  color: var(--muted); padding: 11px 16px; border-bottom: 1px solid var(--line); background: #fbfbf8;
  white-space: nowrap;
}
table.data td { padding: 10px 16px; border-bottom: 1px solid var(--line); font-variant-numeric: tabular-nums; }
table.data tr:last-child td { border-bottom: none; }
table.data tr.hl td { background: var(--accent-soft); font-weight: 600; }
.chip { display: inline-block; padding: 2px 9px; border-radius: 99px; font-size: 0.8rem; font-weight: 600; background: var(--steel-soft); color: var(--steel); }
.chip-orange { background: var(--accent-soft); color: var(--accent-ink); }

.callout { border-left: 3px solid var(--accent); background: var(--card); border-radius: 0 11px 11px 0; padding: 14px 18px; margin: 1.2em 0; box-shadow: var(--shadow-sm); }
.callout.steel { border-left-color: var(--steel); }

/* FAQ */
.faq { max-width: var(--w-prose); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary {
  cursor: pointer; list-style: none; display: flex; justify-content: space-between; gap: 16px; align-items: center;
  font: 600 1.02rem var(--font-body); color: var(--ink); padding: 16px 2px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font: 400 1.5rem var(--font-display); color: var(--accent); transition: transform 0.16s; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq .faq-a { padding: 0 2px 18px; color: var(--ink-2); max-width: 62ch; }

/* quote form */
.quote-band { background: var(--dark); color: var(--dark-text); padding: 60px 0; }
.quote-band h2, .quote-band h3 { color: #fff; }
.quote-band .overline { color: var(--accent); }
.quote-grid { display: grid; grid-template-columns: minmax(0, 0.85fr) minmax(0, 1fr); gap: 40px; align-items: start; }
.quote-form { background: var(--dark-2); border: 1px solid var(--dark-line); border-radius: var(--radius); padding: 22px; display: grid; gap: 13px; grid-template-columns: 1fr 1fr; }
.quote-form .field { min-width: 0; }
.quote-form .field.full { grid-column: 1 / -1; }
.quote-form label { color: #8fa3b3; }
.quote-form input, .quote-form textarea {
  width: 100%; background: #0a1520; color: #e8eef3; border: 1px solid var(--dark-line);
  border-radius: 8px; padding: 10px 11px; font: 500 0.95rem var(--font-body);
}
.quote-form input:focus, .quote-form textarea:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
.quote-form textarea { resize: vertical; min-height: 74px; }
.quote-status { grid-column: 1 / -1; font-size: 0.9rem; min-height: 1.2em; }
.quote-status.ok { color: #6fd3ae; }
.quote-status.err { color: #ff9d7a; }
.benefits { display: grid; gap: 14px; margin: 20px 0 0; padding: 0; list-style: none; }
.benefits li { display: flex; gap: 12px; align-items: flex-start; }
.benefits svg { color: var(--accent); flex: none; margin-top: 3px; }

/* pricing */
.plans { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; align-items: stretch; margin-top: 34px; }
.plan { display: flex; flex-direction: column; padding: 26px; position: relative; }
.plan.hot { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent), var(--shadow); }
.plan .flag { position: absolute; top: -12px; left: 24px; background: var(--accent); color: #fff; font: 700 0.72rem var(--font-body); letter-spacing: 0.08em; text-transform: uppercase; padding: 4px 10px; border-radius: 99px; }
.plan h3 { font-size: 1.15rem; }
.price { font: 700 2.5rem var(--font-display); letter-spacing: -0.02em; color: var(--ink); margin: 8px 0 2px; }
.price small { font: 500 0.95rem var(--font-body); color: var(--muted); letter-spacing: 0; }
.plan ul { list-style: none; margin: 18px 0 22px; padding: 0; display: grid; gap: 10px; font-size: 0.94rem; color: var(--ink-2); }
.plan ul li { display: flex; gap: 9px; align-items: flex-start; }
.plan ul svg { color: var(--good); flex: none; margin-top: 4px; }
.plan .btn { margin-top: auto; }
.mathband { margin-top: 44px; }
.mathband .stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 20px; }
.mathband .stat-tile { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow-sm); }
.stat-tile b { font: 700 1.9rem var(--font-display); color: var(--accent); display: block; letter-spacing: -0.02em; }
.stat-tile span { font-size: 0.9rem; color: var(--ink-2); }

/* guides */
.guide-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; margin-top: 30px; }
.guide-card { padding: 22px; text-decoration: none; color: var(--ink); display: flex; flex-direction: column; gap: 8px; transition: transform 0.12s, box-shadow 0.12s; }
.guide-card:hover { transform: translateY(-2px); box-shadow: 0 2px 3px rgba(18,34,47,0.06), 0 16px 40px -14px rgba(18,34,47,0.22); }
.guide-card .tag { font-size: 0.72rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent); }
.guide-card h3 { margin: 0; font-size: 1.08rem; line-height: 1.3; }
.guide-card p { margin: 0; font-size: 0.9rem; color: var(--ink-2); }
.guide-card .more { margin-top: auto; padding-top: 8px; font-size: 0.88rem; font-weight: 600; color: var(--steel); }

/* article */
.article-head { padding: 52px 0 8px; }
.crumbs { font-size: 0.85rem; color: var(--muted); margin-bottom: 14px; }
.crumbs a { color: var(--muted); }
.article-meta { font-size: 0.88rem; color: var(--muted); margin-top: 10px; }
.article-body { padding: 26px 0 60px; }
.article-body h2 { margin-top: 1.8em; }
.article-body h3 { margin-top: 1.5em; }
.article-body ul, .article-body ol { padding-left: 1.3em; color: var(--ink-2); }
.article-body li { margin-bottom: 0.45em; }
.article-cta { margin: 2em 0; padding: 22px; border-radius: var(--radius); background: var(--dark); color: var(--dark-text); display: flex; gap: 18px; align-items: center; justify-content: space-between; flex-wrap: wrap; }
.article-cta b { color: #fff; font-family: var(--font-display); font-size: 1.1rem; letter-spacing: -0.01em; }
.related { border-top: 1px solid var(--line); padding-top: 26px; margin-top: 40px; }

/* footer */
footer.site { background: var(--dark); color: var(--dark-text); padding: 52px 0 34px; margin-top: 0; }
footer.site a { color: var(--dark-text); text-decoration: none; }
footer.site a:hover { color: #fff; }
.foot-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 30px; }
.foot-brand { color: #fff; }
.foot-grid h4 { color: #fff; font-size: 0.85rem; letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 12px; }
.foot-grid ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 9px; font-size: 0.92rem; }
.foot-note { border-top: 1px solid var(--dark-line); margin-top: 38px; padding-top: 22px; font-size: 0.84rem; color: #7d92a3; display: flex; justify-content: space-between; gap: 18px; flex-wrap: wrap; }
.foot-note .builtby a { color: var(--accent); font-weight: 600; }
.disclaimer { font-size: 0.84rem; color: #7d92a3; max-width: 62ch; margin-top: 14px; }

/* embed mode */
body.embed .topnav, body.embed .hero-extra, body.embed .section, body.embed .quote-band, body.embed footer.site, body.embed .viewer-card { display: none !important; }
body.embed .hero { padding-top: 14px; }
body.embed h1 { font-size: 1.5rem; }
.embed-badge { display: none; }
body.embed .embed-badge { display: block; text-align: right; padding: 8px 22px 20px; font-size: 0.82rem; }

/* misc */
.hr-soft { border: none; border-top: 1px solid var(--line); margin: 2em 0; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 26px; align-items: start; }
.center { text-align: center; }
.mt-0 { margin-top: 0; } .mb-0 { margin-bottom: 0; }

/* ---------- responsive ---------- */
@media (max-width: 980px) {
  .calc-grid { grid-template-columns: 1fr; }
  .results { position: static; }
  .quote-grid { grid-template-columns: 1fr; }
  .plans { grid-template-columns: 1fr; max-width: 460px; }
  .guide-grid { grid-template-columns: 1fr 1fr; }
  .foot-grid { grid-template-columns: 1fr 1fr; }
  .mathband .stats { grid-template-columns: 1fr; }
}
@media (max-width: 760px) {
  body { font-size: 16px; }
  .navlinks { display: none; }
  .navlinks.open {
    display: flex; position: absolute; top: 62px; left: 0; right: 0;
    flex-direction: column; align-items: flex-start; gap: 4px;
    background: var(--bg); border-bottom: 1px solid var(--line);
    padding: 10px 22px 16px; box-shadow: var(--shadow);
  }
  .navlinks.open a { padding: 9px 0; font-size: 1.02rem; width: 100%; }
  .nav-burger {
    display: inline-flex; margin-left: auto; background: none; border: 1px solid var(--line-2);
    border-radius: 8px; padding: 7px 9px; cursor: pointer; color: var(--ink);
  }
  .nav-cta { margin-left: 8px; }
  .unit-row { grid-template-columns: 1fr 1fr 1fr; }
  .unit-row .f-qty { grid-column: span 1; }
  .unit-row .f-weight { grid-column: span 2; }
  .unit-row { position: relative; padding-right: 34px; }
  .unit-row .row-x { position: absolute; top: 6px; right: 6px; }
  .guide-grid { grid-template-columns: 1fr; }
  #pallet3d { height: 320px; }
  .class-big { font-size: 2.7rem; }
  .hero { padding-top: 38px; }
  .section { padding: 40px 0; }
}