@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@500;600&family=Plus+Jakarta+Sans:wght@400;500;600;700&family=Space+Grotesk:wght@600;700&display=swap');

:root {
  --bg: #faf9f6;
  --surface: #ffffff;
  --surface-subtle: #f4f4f0;
  --ink: #0f172a;
  --ink-muted: #525866;
  --border: #e5e7eb;
  --border-strong: #d1d5db;
  --primary: #0f172a;
  --accent: #ea580c;
  --accent-hover: #c2410c;
  --accent-soft: #ffedd5;
  --blueprint: #2563eb;
  --blueprint-soft: #eff6ff;
  --success: #059669;
  --font-head: 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, monospace;
  --radius: 16px;
  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.04);
  --shadow-card: 0 6px 24px -4px rgba(15, 23, 42, 0.07), 0 1px 3px rgba(15, 23, 42, 0.04);
  --shadow-hover: 0 16px 36px -8px rgba(234, 88, 12, 0.16), 0 4px 12px rgba(15, 23, 42, 0.05);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  background-color: var(--bg);
  background-image:
    linear-gradient(to right, rgba(15, 23, 42, 0.03) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(15, 23, 42, 0.03) 1px, transparent 1px);
  background-size: 32px 32px;
  color: var(--ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, .brand {
  font-family: var(--font-head);
  letter-spacing: -0.025em;
}

a { color: var(--accent-hover); text-decoration: none; }
a:hover { text-decoration: underline; }

.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 22px;
}

/* Header */
.site-header {
  background: rgba(15, 23, 42, 0.96);
  backdrop-filter: blur(12px);
  color: #ffffff;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  position: sticky;
  top: 0;
  z-index: 50;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 13px 0;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #ffffff;
  font-weight: 700;
  font-size: 1.2rem;
}

.brand:hover { text-decoration: none; }

.brand-badge {
  background: linear-gradient(135deg, #f97316 0%, #dc2626 100%);
  color: #ffffff;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(234, 88, 12, 0.4);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.nav-links {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  font-size: 0.9rem;
}

.nav-links a {
  color: #cbd5e1;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: 999px;
  transition: background 0.15s, color 0.15s;
}

.nav-links a:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.08);
  text-decoration: none;
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 999px;
  overflow: hidden;
  font-size: 0.78rem;
  font-weight: 700;
  background: rgba(255, 255, 255, 0.06);
}

.lang-switch a,
.lang-switch .lang-cur {
  padding: 5px 10px;
  color: #cbd5e1;
  text-decoration: none;
  line-height: 1.1;
}

.lang-switch a:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.1);
}

.lang-switch .lang-cur {
  background: #f97316;
  color: #ffffff;
}

/* Breadcrumbs */
.breadcrumbs {
  font-size: 0.84rem;
  color: var(--ink-muted);
  margin: 20px 0 6px;
}

.breadcrumbs a { color: var(--ink-muted); }

/* Hero */
.hero-banner {
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 65%, #311509 100%);
  color: #ffffff;
  border-radius: 24px;
  padding: 40px 36px;
  margin: 24px 0 28px;
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 44px -14px rgba(15, 23, 42, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.hero-banner::after {
  content: "";
  position: absolute;
  right: -60px;
  top: -60px;
  width: 280px;
  height: 280px;
  background: radial-gradient(circle, rgba(249, 115, 22, 0.28) 0%, transparent 70%);
  pointer-events: none;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(249, 115, 22, 0.16);
  border: 1px solid rgba(251, 146, 60, 0.35);
  color: #fdba74;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 5px 12px;
  border-radius: 999px;
  margin-bottom: 14px;
}

.hero-banner h1 {
  margin: 0 0 12px;
  font-size: clamp(1.9rem, 3.8vw, 2.85rem);
  line-height: 1.1;
}

.hero-highlight {
  color: #fb923c;
  text-decoration: underline;
  text-decoration-color: rgba(251, 146, 60, 0.45);
  text-underline-offset: 6px;
}

.hero-banner p {
  margin: 0 0 22px;
  color: #cbd5e1;
  max-width: 650px;
  font-size: 1.05rem;
}

.hero-search-wrap {
  position: relative;
  max-width: 520px;
}

.search-bar {
  width: 100%;
  padding: 14px 52px 14px 18px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 14px;
  font-size: 0.98rem;
  font-family: var(--font-body);
  background: rgba(255, 255, 255, 0.97);
  color: var(--ink);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

.search-bar:focus {
  outline: none;
  border-color: #fb923c;
  box-shadow: 0 0 0 4px rgba(249, 115, 22, 0.25);
}

.kbd-hint {
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  background: #e2e8f0;
  color: #475569;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 6px;
  pointer-events: none;
}

/* Filter Pills */
.filter-bar {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin: 10px 0 22px;
}

.filter-pill {
  cursor: pointer;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--ink-muted);
  font-family: var(--font-body);
  font-size: 0.86rem;
  font-weight: 600;
  padding: 8px 16px;
  border-radius: 999px;
  transition: all 0.15s;
}

.filter-pill:hover {
  border-color: var(--accent);
  color: var(--ink);
}

.filter-pill.active {
  background: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
}

/* Page Hero (Inner Pages) */
.page-hero {
  padding: 18px 0 22px;
}

.page-hero h1 {
  margin: 0 0 8px;
  font-size: clamp(1.75rem, 3.2vw, 2.4rem);
  line-height: 1.15;
}

.page-hero p {
  margin: 0;
  color: var(--ink-muted);
  max-width: 740px;
  font-size: 1.04rem;
}

.category-pill {
  display: inline-block;
  background: var(--accent-soft);
  color: var(--accent-hover);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 4px 10px;
  border-radius: 999px;
}

.cat-concrete { background: #fee2e2; color: #b91c1c; }
.cat-landscaping { background: #dcfce7; color: #15803d; }
.cat-interior { background: #dbeafe; color: #1d4ed8; }
.cat-outdoor { background: #fef3c7; color: #b45309; }
.cat-roofing { background: #ede9fe; color: #6d28d9; }

/* Calculator Bento Layout */
.calc-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin-bottom: 30px;
}

@media (min-width: 880px) {
  .calc-layout {
    grid-template-columns: 1.12fr 0.88fr;
    align-items: start;
  }
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 26px;
  box-shadow: var(--shadow-card);
}

.card h2 {
  margin-top: 0;
  font-size: 1.18rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border);
  padding-bottom: 12px;
  margin-bottom: 20px;
}

/* Blueprint Diagram Box */
.diagram-box {
  background: var(--blueprint-soft);
  border: 1px solid #bfdbfe;
  border-radius: 14px;
  padding: 14px 18px;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.diagram-caption {
  font-size: 0.84rem;
  color: #1e3a8a;
  font-weight: 600;
}

.diagram-caption span {
  display: block;
  font-weight: 400;
  color: #3b82f6;
  font-size: 0.78rem;
  margin-top: 2px;
}

/* Docked Unit Inputs */
.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(195px, 1fr));
  gap: 16px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.field label {
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--ink);
}

.input-group {
  display: flex;
  align-items: stretch;
  border: 1px solid var(--border-strong);
  border-radius: 10px;
  overflow: hidden;
  background: #ffffff;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.input-group:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(234, 88, 12, 0.16);
}

.input-group input,
.input-group select {
  width: 100%;
  border: none;
  padding: 11px 12px;
  font-size: 0.98rem;
  font-family: var(--font-body);
  font-weight: 600;
  color: var(--ink);
  background: transparent;
  font-variant-numeric: tabular-nums;
}

.input-group input:focus,
.input-group select:focus {
  outline: none;
}

.unit-tag {
  display: inline-flex;
  align-items: center;
  padding: 0 11px;
  background: var(--surface-subtle);
  border-left: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--ink-muted);
  white-space: nowrap;
}

.field-hint {
  font-size: 0.76rem;
  color: var(--ink-muted);
}

.btn-row {
  display: flex;
  gap: 10px;
  margin-top: 22px;
  flex-wrap: wrap;
}

.btn {
  cursor: pointer;
  border: none;
  border-radius: 999px;
  padding: 11px 22px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.92rem;
  transition: all 0.15s;
}

.btn-primary {
  background: linear-gradient(135deg, #ea580c 0%, #dc2626 100%);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(234, 88, 12, 0.3);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(234, 88, 12, 0.4);
}

.btn-secondary {
  background: var(--surface-subtle);
  color: var(--ink);
  border: 1px solid var(--border);
}

.btn-secondary:hover { background: #e5e7eb; }

/* Results Panel */
.results-panel {
  background: linear-gradient(165deg, #0f172a 0%, #1e293b 100%);
  color: #ffffff;
  border-radius: 20px;
  padding: 26px;
  box-shadow: 0 18px 40px -12px rgba(15, 23, 42, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.results-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  padding-bottom: 12px;
  margin-bottom: 18px;
}

.results-header h2 {
  margin: 0;
  font-size: 1.08rem;
  color: #e2e8f0;
}

.copy-est-btn {
  cursor: pointer;
  background: rgba(255, 255, 255, 0.1);
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  padding: 5px 12px;
  font-size: 0.78rem;
  font-weight: 600;
  font-family: var(--font-body);
  transition: background 0.15s;
}

.copy-est-btn:hover { background: rgba(255, 255, 255, 0.2); }

.result-primary {
  background: linear-gradient(135deg, rgba(234, 88, 12, 0.18) 0%, rgba(220, 38, 38, 0.12) 100%);
  border: 1px solid rgba(251, 146, 60, 0.45);
  border-radius: 14px;
  padding: 18px;
  margin-bottom: 18px;
}

.result-primary .label {
  font-size: 0.76rem;
  font-family: var(--font-mono);
  color: #fdba74;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.result-primary .value {
  font-family: var(--font-head);
  font-size: 2.4rem;
  font-weight: 700;
  color: #ffffff;
  line-height: 1.15;
  margin-top: 4px;
  font-variant-numeric: tabular-nums;
}

.result-list {
  display: grid;
  gap: 8px;
}

.result-item {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 10px 12px;
  background: rgba(255, 255, 255, 0.04);
  border-radius: 10px;
  font-size: 0.93rem;
}

.result-item span:first-child { color: #cbd5e1; }
.result-item strong {
  color: #ffffff;
  font-family: var(--font-mono);
  font-size: 0.96rem;
  font-variant-numeric: tabular-nums;
}

/* AdSense / Display Ad Compatibility (zero CLS, auto-collapse on unfilled) */
.ad-unit {
  margin: 28px auto;
  padding: 12px 0;
  min-height: 112px;
  width: 100%;
  max-width: 970px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  clear: both;
}

.ad-unit .ad-label {
  font-size: 0.68rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: 6px;
  user-select: none;
}

.ad-unit ins.adsbygoogle {
  display: block;
  width: 100%;
  min-height: 90px;
  background: transparent;
}

.ad-unit ins.adsbygoogle[data-ad-status="unfilled"],
.ad-unit:has(ins.adsbygoogle[data-ad-status="unfilled"]) {
  display: none !important;
  min-height: 0 !important;
  margin: 0 !important;
  padding: 0 !important;
}

/* Content Sections */
.content-section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 28px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
}

.content-section h2 { margin-top: 0; font-size: 1.35rem; }

.formula-box {
  background: #0f172a;
  color: #f8fafc;
  border-left: 4px solid var(--accent);
  padding: 14px 18px;
  border-radius: 0 12px 12px 0;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  overflow-x: auto;
  margin: 14px 0;
}

table.ref-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 14px;
  font-size: 0.92rem;
}

table.ref-table th,
table.ref-table td {
  text-align: left;
  padding: 11px 14px;
  border-bottom: 1px solid var(--border);
}

table.ref-table th {
  background: var(--surface-subtle);
  font-weight: 700;
}

.faq-item { border-bottom: 1px solid var(--border); padding: 14px 0; }
.faq-item:last-child { border-bottom: none; }
.faq-item h3 { margin: 0 0 6px; font-size: 1.04rem; }
.faq-item p { margin: 0; color: var(--ink-muted); }

/* Bento Directory Grid */
.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 18px;
  margin: 18px 0 42px;
}

.tool-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 22px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.tool-card:hover {
  transform: translateY(-4px);
  border-color: #fdba74;
  box-shadow: var(--shadow-hover);
  text-decoration: none;
}

.card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.icon-badge {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.tool-card h3 {
  margin: 0 0 8px;
  font-size: 1.12rem;
  color: var(--ink);
}

.tool-card p {
  margin: 0 0 16px;
  font-size: 0.89rem;
  color: var(--ink-muted);
  line-height: 1.5;
}

.tool-card .go-link {
  font-size: 0.86rem;
  font-weight: 700;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* Footer */
.site-footer {
  background: var(--primary);
  color: #cbd5e1;
  padding: 40px 0;
  margin-top: 56px;
  font-size: 0.9rem;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-links { display: flex; gap: 18px; flex-wrap: wrap; }
.footer-links a { color: #cbd5e1; }