/*
 * Embroidery Cost Lab — v0.1
 * Clean, mobile-first, accessible. No frameworks.
 */

:root {
  --bg: #fafaf7;
  --surface: #ffffff;
  --ink: #1a1a1a;
  --ink-soft: #4a4a4a;
  --ink-muted: #7a7a7a;
  --border: #e5e2dc;
  --accent: #234a5f;
  --accent-soft: #f0f5f7;
  --highlight: #d4a574;
  --success: #4a7856;
  --radius: 8px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, monospace;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow: 0 4px 12px rgba(0,0,0,0.06);
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ---------- Header ---------- */
.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 16px 0;
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.brand {
  font-size: 18px;
  font-weight: 700;
  color: var(--accent);
  text-decoration: none;
}
.brand-mark { color: var(--highlight); }
.site-nav ul {
  display: flex;
  gap: 20px;
  list-style: none;
  margin: 0; padding: 0;
}
.site-nav a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 15px;
}
.site-nav a:hover, .site-nav a:focus { color: var(--accent); }

/* ---------- Hero ---------- */
.hero {
  padding: 48px 0 24px;
  text-align: center;
}
.hero h1 {
  font-size: clamp(28px, 5vw, 42px);
  line-height: 1.2;
  margin: 0 0 12px;
  color: var(--ink);
}
.hero .tagline {
  color: var(--ink-soft);
  max-width: 640px;
  margin: 0 auto;
  font-size: 18px;
}
.hero .badge-row {
  margin-top: 16px;
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}
.badge {
  background: var(--accent-soft);
  color: var(--accent);
  padding: 6px 14px;
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
}

/* ---------- Calculator ---------- */
.calculator {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  margin: 32px 0;
  box-shadow: var(--shadow);
}
.calculator h2 {
  margin: 0 0 20px;
  font-size: 22px;
  color: var(--accent);
}
.calc-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px 20px;
}
@media (max-width: 640px) {
  .calc-grid { grid-template-columns: 1fr; }
  .calculator { padding: 20px; }
}
.field { display: flex; flex-direction: column; gap: 6px; }
.field label {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink-soft);
}
.field .hint {
  font-size: 12px;
  color: var(--ink-muted);
  margin-top: 2px;
}
input[type="number"], select {
  padding: 10px 12px;
  font-size: 15px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  color: var(--ink);
  font-family: inherit;
}
input[type="number"]:focus, select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(35, 74, 95, 0.12);
}

.calc-actions {
  margin-top: 24px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.btn {
  padding: 12px 20px;
  border: none;
  border-radius: 6px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  transition: transform 0.05s;
}
.btn:active { transform: scale(0.98); }
.btn-primary { background: var(--accent); color: white; }
.btn-primary:hover { background: #1a3a4c; }
.btn-secondary {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--border);
}
.btn-secondary:hover { background: var(--accent-soft); }

/* ---------- Results ---------- */
.results {
  margin-top: 28px;
  padding: 24px;
  background: var(--accent-soft);
  border-radius: var(--radius);
  border: 1px solid rgba(35, 74, 95, 0.1);
}
.results.hidden { display: none; }
.headline-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 20px;
}
@media (max-width: 480px) {
  .headline-row { grid-template-columns: 1fr; }
}
.headline-cell {
  background: white;
  padding: 16px 20px;
  border-radius: 6px;
  border: 1px solid var(--border);
}
.headline-label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-muted);
  font-weight: 600;
}
.headline-value {
  font-size: 28px;
  font-weight: 700;
  color: var(--accent);
  margin-top: 4px;
  font-variant-numeric: tabular-nums;
}
.headline-value.suggested { color: var(--success); }

.breakdown h3 {
  margin: 20px 0 12px;
  font-size: 15px;
  color: var(--ink-soft);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.breakdown-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}
.breakdown-table td {
  padding: 10px 4px;
  border-bottom: 1px solid var(--border);
}
.breakdown-table td:last-child {
  text-align: right;
  font-variant-numeric: tabular-nums;
  font-family: var(--font-mono);
  font-size: 14px;
}
.breakdown-table tr.total td {
  font-weight: 700;
  border-bottom: none;
  padding-top: 14px;
}

.notes {
  margin-top: 20px;
  font-size: 13px;
  color: var(--ink-muted);
  line-height: 1.5;
}
.notes a { color: var(--accent); }

/* ---------- Content sections ---------- */
.section {
  padding: 40px 0;
  border-top: 1px solid var(--border);
  margin-top: 40px;
}
.section h2 {
  font-size: 24px;
  color: var(--ink);
  margin: 0 0 16px;
}
.section p {
  color: var(--ink-soft);
  margin: 0 0 16px;
  max-width: 700px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
  margin-top: 20px;
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  text-decoration: none;
  color: var(--ink);
  transition: box-shadow 0.15s;
  box-shadow: var(--shadow-sm);
}
.card:hover {
  box-shadow: var(--shadow);
  border-color: var(--accent);
}
.card h3 {
  margin: 0 0 6px;
  font-size: 16px;
  color: var(--accent);
}
.card p {
  margin: 0;
  font-size: 14px;
  color: var(--ink-muted);
}

/* ---------- Footer ---------- */
.site-footer {
  margin-top: 60px;
  padding: 32px 0;
  border-top: 1px solid var(--border);
  color: var(--ink-muted);
  font-size: 14px;
  text-align: center;
}
.site-footer a { color: var(--accent); text-decoration: none; }
.site-footer a:hover { text-decoration: underline; }