/* ============================================
   SITECALC.NET — Main Stylesheet
   Industrial-utilitarian aesthetic
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Barlow+Condensed:wght@400;600;700;800&family=Barlow:wght@400;500;600&display=swap');

/* ---- Variables ---- */
:root {
  --navy: #0f1f3d;
  --navy-light: #1a3260;
  --orange: #f97316;
  --orange-dark: #ea6c0a;
  --orange-glow: rgba(249,115,22,0.15);
  --white: #ffffff;
  --gray-50: #f8f9fa;
  --gray-100: #f1f3f5;
  --gray-200: #e9ecef;
  --gray-400: #adb5bd;
  --gray-600: #6c757d;
  --gray-800: #343a40;
  --green: #22c55e;
  --text: #1a1a2e;
  --radius: 6px;
  --shadow: 0 2px 12px rgba(15,31,61,0.10);
  --shadow-lg: 0 8px 32px rgba(15,31,61,0.15);
  --transition: 0.18s ease;
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Barlow', sans-serif;
  font-size: 16px;
  color: var(--text);
  background: var(--gray-50);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--orange); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---- Layout ---- */
.container { max-width: 1080px; margin: 0 auto; padding: 0 20px; }
.page-wrap { min-height: 100vh; display: flex; flex-direction: column; }
main { flex: 1; }

/* ---- Header ---- */
.site-header {
  background: var(--navy);
  border-bottom: 3px solid var(--orange);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 16px rgba(0,0,0,0.25);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  max-width: 1080px;
  margin: 0 auto;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}
.logo-icon {
  width: 36px;
  height: 36px;
  background: var(--orange);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 800;
  font-size: 18px;
  color: white;
  letter-spacing: -1px;
}
.logo-text {
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 800;
  font-size: 22px;
  color: var(--white);
  letter-spacing: 0.5px;
}
.logo-text span { color: var(--orange); }
.site-nav { display: flex; gap: 24px; align-items: center; }
.site-nav a {
  color: rgba(255,255,255,0.75);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  transition: color var(--transition);
}
.site-nav a:hover { color: var(--orange); text-decoration: none; }

/* ---- Hero ---- */
.hero {
  background: var(--navy);
  background-image:
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 39px,
      rgba(255,255,255,0.03) 39px,
      rgba(255,255,255,0.03) 40px
    ),
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 39px,
      rgba(255,255,255,0.03) 39px,
      rgba(255,255,255,0.03) 40px
    );
  padding: 64px 20px 56px;
  text-align: center;
  border-bottom: 3px solid var(--orange);
}
.hero h1 {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: clamp(32px, 6vw, 58px);
  font-weight: 800;
  color: var(--white);
  line-height: 1.1;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 16px;
}
.hero h1 span { color: var(--orange); }
.hero p {
  color: rgba(255,255,255,0.70);
  font-size: 17px;
  max-width: 540px;
  margin: 0 auto 32px;
}
.badge-row {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}
.badge {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  color: rgba(255,255,255,0.75);
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 5px 12px;
  border-radius: 20px;
}

/* ---- Section ---- */
.section { padding: 56px 20px; }
.section-title {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 28px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--navy);
  margin-bottom: 8px;
}
.section-sub {
  color: var(--gray-600);
  font-size: 15px;
  margin-bottom: 36px;
}

/* ---- Calculator Cards (Homepage) ---- */
.calc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
  margin-top: 32px;
}
.calc-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 28px 24px;
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  position: relative;
  overflow: hidden;
}
.calc-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--orange);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}
.calc-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--orange);
  text-decoration: none;
}
.calc-card:hover::before { transform: scaleX(1); }
.calc-icon {
  font-size: 32px;
  line-height: 1;
}
.calc-card h3 {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 20px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--navy);
  letter-spacing: 0.3px;
}
.calc-card p {
  font-size: 14px;
  color: var(--gray-600);
  line-height: 1.5;
}
.calc-card-arrow {
  margin-top: auto;
  color: var(--orange);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* ---- Calculator Page ---- */
.calc-page-hero {
  background: var(--navy);
  padding: 36px 20px 32px;
  border-bottom: 3px solid var(--orange);
}
.calc-page-hero h1 {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: clamp(26px, 5vw, 42px);
  font-weight: 800;
  color: var(--white);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
}
.calc-page-hero p {
  color: rgba(255,255,255,0.65);
  font-size: 15px;
  max-width: 600px;
}
.breadcrumb {
  font-size: 13px;
  color: rgba(255,255,255,0.45);
  margin-bottom: 12px;
}
.breadcrumb a { color: var(--orange); text-decoration: none; }

/* ---- Calculator Widget ---- */
.calc-widget-wrap {
  max-width: 700px;
  margin: -24px auto 0;
  padding: 0 20px;
  position: relative;
  z-index: 10;
}
.calc-widget {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  border: 1px solid var(--gray-200);
}
.calc-widget-header {
  background: var(--navy-light);
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.calc-widget-header h2 {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 16px;
  font-weight: 700;
  color: var(--white);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.unit-toggle {
  display: flex;
  background: rgba(0,0,0,0.2);
  border-radius: 4px;
  overflow: hidden;
}
.unit-btn {
  padding: 5px 12px;
  font-size: 12px;
  font-weight: 700;
  color: rgba(255,255,255,0.5);
  background: transparent;
  border: none;
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  transition: all var(--transition);
}
.unit-btn.active {
  background: var(--orange);
  color: white;
}
.calc-widget-body { padding: 28px 24px; }
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}
.form-row.full { grid-template-columns: 1fr; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--gray-600);
}
.form-group input,
.form-group select {
  height: 48px;
  border: 2px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 0 14px;
  font-family: 'Barlow', sans-serif;
  font-size: 16px;
  color: var(--text);
  background: var(--white);
  transition: border-color var(--transition);
  width: 100%;
  appearance: none;
  -webkit-appearance: none;
}
.form-group select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' fill='none'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%236c757d' stroke-width='2' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
}
.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--orange);
  box-shadow: 0 0 0 3px var(--orange-glow);
}
.calc-btn {
  width: 100%;
  height: 54px;
  background: var(--orange);
  color: white;
  border: none;
  border-radius: var(--radius);
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 18px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 1px;
  cursor: pointer;
  margin-top: 8px;
  transition: background var(--transition), transform var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
.calc-btn:hover { background: var(--orange-dark); transform: translateY(-1px); }
.calc-btn:active { transform: translateY(0); }

/* ---- Results ---- */
.results-panel {
  border-top: 1px solid var(--gray-200);
  padding: 24px;
  background: var(--gray-50);
  display: none;
}
.results-panel.visible { display: block; }
.results-title {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--gray-600);
  margin-bottom: 16px;
}
.result-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 12px;
}
.result-item {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 14px 16px;
  position: relative;
}
.result-item.primary {
  border-color: var(--orange);
  background: #fff8f5;
}
.result-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--gray-600);
  margin-bottom: 4px;
}
.result-value {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 26px;
  font-weight: 800;
  color: var(--navy);
  line-height: 1;
}
.result-item.primary .result-value { color: var(--orange); }
.result-unit {
  font-size: 12px;
  color: var(--gray-400);
  margin-top: 2px;
}
.copy-btn {
  position: absolute;
  top: 8px; right: 8px;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--gray-400);
  font-size: 14px;
  padding: 2px;
  transition: color var(--transition);
}
.copy-btn:hover { color: var(--orange); }

/* Waste factor chips */
.waste-chips {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.chip {
  padding: 6px 14px;
  border: 2px solid var(--gray-200);
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  background: white;
  transition: all var(--transition);
  color: var(--gray-600);
}
.chip.active {
  border-color: var(--orange);
  background: var(--orange);
  color: white;
}

/* ---- SEO Content ---- */
.seo-content {
  max-width: 700px;
  margin: 48px auto 0;
  padding: 0 20px 64px;
}
.seo-content h2 {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 22px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--navy);
  margin: 36px 0 12px;
  letter-spacing: 0.3px;
}
.seo-content p { color: var(--gray-800); font-size: 15px; line-height: 1.7; margin-bottom: 12px; }
.formula-box {
  background: var(--navy);
  color: rgba(255,255,255,0.85);
  padding: 16px 20px;
  border-radius: var(--radius);
  font-family: monospace;
  font-size: 14px;
  margin: 16px 0;
  border-left: 4px solid var(--orange);
}
.faq-item { margin-bottom: 20px; }
.faq-q {
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 6px;
  font-size: 15px;
}
.faq-a { color: var(--gray-600); font-size: 14px; line-height: 1.6; }
.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px;
  margin-top: 16px;
}
.related-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 14px 16px;
  text-decoration: none;
  color: var(--navy);
  font-size: 14px;
  font-weight: 600;
  transition: all var(--transition);
  display: flex;
  align-items: center;
  gap: 8px;
}
.related-card:hover {
  border-color: var(--orange);
  color: var(--orange);
  text-decoration: none;
}

/* ---- Footer ---- */
.site-footer {
  background: var(--navy);
  border-top: 3px solid var(--orange);
  color: rgba(255,255,255,0.5);
  padding: 32px 20px;
  text-align: center;
  font-size: 13px;
}
.footer-links {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.footer-links a { color: rgba(255,255,255,0.5); text-decoration: none; font-size: 13px; transition: color var(--transition); }
.footer-links a:hover { color: var(--orange); }

/* ---- Utility ---- */
.text-center { text-align: center; }
.mt-8 { margin-top: 8px; }
.mb-0 { margin-bottom: 0; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }

/* ---- Animations ---- */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}
.results-panel.visible { animation: fadeUp 0.25s ease; }

/* ---- Responsive ---- */
@media (max-width: 600px) {
  .form-row { grid-template-columns: 1fr; }
  .calc-grid { grid-template-columns: 1fr; }
  .result-grid { grid-template-columns: 1fr 1fr; }
  .site-nav { display: none; }
  .hero { padding: 40px 20px 36px; }
  .calc-widget-body { padding: 20px 16px; }
  .results-panel { padding: 20px 16px; }
}