/* Cubic Yard Hub - Professional Contractor & Landscaping Theme */
:root {
  --primary: #1e3a8a; /* Deep Contractor Blue */
  --primary-hover: #1e40af;
  --secondary: #d97706; /* Industrial Safety Amber */
  --secondary-hover: #b45309;
  --bg-slate: #f8fafc;
  --card-bg: #ffffff;
  --border: #e2e8f0;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --accent-green: #15803d;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-slate);
  color: var(--text-main);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* Header & Nav */
.site-header {
  background: #ffffff;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--text-main);
  font-weight: 900;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.brand-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--primary), #3b82f6);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 900;
  font-size: 1rem;
  box-shadow: 0 2px 4px rgba(30, 58, 138, 0.2);
}

.brand-logo span.highlight {
  color: var(--secondary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 0.875rem;
  font-weight: 600;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.15s ease;
  padding: 0.35rem 0.6rem;
  border-radius: 6px;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--primary);
  background: #eff6ff;
}

/* Layout Container */
.main-wrapper {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.5rem 1rem 3rem 1rem;
}

/* Hero Section */
.hero-banner {
  background: linear-gradient(180deg, #eff6ff 0%, #ffffff 100%);
  border: 1px solid #dbeafe;
  border-radius: 1rem;
  padding: 2rem 1.5rem;
  margin-bottom: 2rem;
  text-align: center;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: #ffffff;
  border: 1px solid #bfdbfe;
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 1rem;
  box-shadow: 0 1px 2px rgba(0,0,0,0.05);
}

.hero-title {
  font-size: 2rem;
  font-weight: 900;
  color: #0f172a;
  letter-spacing: -0.025em;
  line-height: 1.2;
  margin-bottom: 0.75rem;
}

.hero-title span.accent {
  color: var(--secondary);
}

.hero-subtitle {
  font-size: 0.95rem;
  color: var(--text-muted);
  max-width: 720px;
  margin: 0 auto 1.5rem auto;
  line-height: 1.6;
}

/* Calculator Grid */
.calc-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-bottom: 2.5rem;
}

@media (min-width: 900px) {
  .calc-grid {
    grid-template-columns: 7fr 5fr;
  }
}

.calc-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 1rem;
  padding: 1.5rem;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.card-header {
  border-bottom: 1px solid var(--border);
  padding-bottom: 1rem;
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: #0f172a;
}

/* Form Controls */
.form-group {
  margin-bottom: 1rem;
}

.form-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  font-weight: 700;
  color: #1e293b;
  margin-bottom: 0.35rem;
}

.input-row {
  display: flex;
  gap: 0.5rem;
}

.form-input, .form-select {
  width: 100%;
  padding: 0.6rem 0.75rem;
  border: 1px solid #cbd5e1;
  border-radius: 8px;
  font-size: 0.875rem;
  font-family: inherit;
  background: #ffffff;
  color: #0f172a;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.form-input:focus, .form-select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.15);
}

.unit-addon {
  padding: 0.6rem 0.75rem;
  background: #f1f5f9;
  border: 1px solid #cbd5e1;
  border-radius: 8px;
  font-size: 0.8rem;
  font-weight: 700;
  color: #475569;
  display: flex;
  align-items: center;
}

/* Shape Tabs */
.shape-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
  background: #f1f5f9;
  padding: 0.25rem;
  border-radius: 10px;
}

.shape-btn {
  flex: 1;
  padding: 0.5rem;
  border: none;
  background: transparent;
  font-size: 0.75rem;
  font-weight: 700;
  color: #475569;
  border-radius: 7px;
  cursor: pointer;
  transition: all 0.15s;
}

.shape-btn.active {
  background: #ffffff;
  color: var(--primary);
  box-shadow: 0 1px 2px rgba(0,0,0,0.08);
}

/* Results Display Card */
.results-card {
  background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
  border: 1px solid #cbd5e1;
  border-radius: 1rem;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.hero-result-box {
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  border-radius: 12px;
  padding: 1.25rem;
  text-align: center;
}

.hero-result-label {
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #1e40af;
}

.hero-result-value {
  font-size: 2.75rem;
  font-weight: 900;
  font-family: var(--font-mono);
  color: #0f172a;
  line-height: 1.1;
  margin: 0.25rem 0;
}

.hero-result-unit {
  font-size: 1rem;
  font-weight: 700;
  color: #475569;
  font-family: var(--font-sans);
}

.secondary-results {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.stat-tile {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem;
}

.stat-tile-label {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
}

.stat-tile-value {
  font-size: 1.15rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: #0f172a;
}

/* Quick Quick Reference Tables */
.data-table-wrapper {
  overflow-x: auto;
  margin: 1.5rem 0;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #ffffff;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.85rem;
}

.data-table th {
  background: #f8fafc;
  color: #1e293b;
  font-weight: 700;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
}

.data-table td {
  padding: 0.65rem 1rem;
  border-bottom: 1px solid #f1f5f9;
  color: #334155;
}

.data-table tr:last-child td {
  border-bottom: none;
}

.data-table tr:hover {
  background: #f8fafc;
}

/* AEO & GEO Content Sections */
.editorial-section {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: 1rem;
  padding: 2rem 1.5rem;
  margin-bottom: 2rem;
  line-height: 1.7;
}

.editorial-section h2 {
  font-size: 1.4rem;
  font-weight: 800;
  color: #0f172a;
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.editorial-section h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: #1e293b;
  margin: 1.25rem 0 0.5rem 0;
}

.editorial-section p {
  color: #334155;
  font-size: 0.925rem;
  margin-bottom: 1rem;
}

/* Formula Callout Box */
.formula-box {
  background: #0f172a;
  color: #f8fafc;
  border-radius: 12px;
  padding: 1.25rem;
  margin: 1.25rem 0;
  font-family: var(--font-mono);
  font-size: 0.9rem;
}

.formula-label {
  color: #fbbf24;
  font-weight: 700;
  font-size: 0.75rem;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
  font-family: var(--font-sans);
}

/* FAQ Accordion */
.faq-grid {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 1rem;
}

.faq-item {
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  background: #ffffff;
}

.faq-question {
  width: 100%;
  text-align: left;
  padding: 1rem 1.25rem;
  background: #ffffff;
  border: none;
  font-size: 0.95rem;
  font-weight: 700;
  color: #0f172a;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}

.faq-answer {
  padding: 0 1.25rem 1rem 1.25rem;
  color: #475569;
  font-size: 0.875rem;
  line-height: 1.6;
}

/* Footer */
.site-footer {
  background: #0f172a;
  color: #94a3b8;
  padding: 3rem 1rem 1.5rem 1rem;
  font-size: 0.825rem;
  border-top: 1px solid #1e293b;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-col h4 {
  color: #ffffff;
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li {
  margin-bottom: 0.5rem;
}

.footer-col a {
  color: #94a3b8;
  text-decoration: none;
  transition: color 0.15s;
}

.footer-col a:hover {
  color: #ffffff;
}

.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  padding-top: 1.5rem;
  border-top: 1px solid #1e293b;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  align-items: center;
  text-align: center;
  font-size: 0.75rem;
}

@media (min-width: 640px) {
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
  }
}