/* ===== enerji.info — shared stylesheet ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --primary: #0f4c81;
  --primary-dark: #0a3862;
  --accent: #f39c12;
  --cpower: #2c3e50;
  --geopower: #c0392b;
  --biopower: #27ae60;
  --bg: #ffffff;
  --bg-soft: #f7f9fc;
  --text: #1a2332;
  --text-muted: #5a6a7a;
  --border: #e8ecf1;
}

html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }

/* ===== Header / Nav ===== */
header.site-header {
  position: sticky;
  top: 0;
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  z-index: 100;
}
.nav {
  max-width: 1200px;
  margin: 0 auto;
  padding: 14px 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}
.brand img {
  height: 44px;
  width: 44px;
  object-fit: contain;
}
.brand-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
}
.brand-text span { color: var(--accent); }

.nav-links {
  display: flex;
  gap: 28px;
  font-size: 15px;
  list-style: none;
}
.nav-links a {
  padding: 6px 2px;
  position: relative;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--primary); }
.nav-links a.active {
  color: var(--primary);
  font-weight: 600;
}
.nav-links a.active::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: -4px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}

.cta-btn {
  background: var(--primary);
  color: #fff !important;
  padding: 10px 22px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 500;
  transition: background 0.2s, transform 0.1s;
  display: inline-block;
  border: none;
  cursor: pointer;
}
.cta-btn:hover { background: var(--primary-dark); }
.cta-btn.large { padding: 14px 32px; font-size: 16px; }
.cta-btn.ghost {
  background: transparent;
  color: var(--primary) !important;
  border: 2px solid var(--primary);
}
.cta-btn.ghost:hover { background: var(--primary); color: #fff !important; }

/* Mobile menu */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 24px;
  cursor: pointer;
  color: var(--primary);
}

/* ===== Hero ===== */
.hero {
  background: linear-gradient(135deg, #0f4c81 0%, #1a6ba8 50%, #2e8bc0 100%);
  color: #fff;
  padding: 90px 32px 110px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(243,156,18,0.18) 0%, transparent 40%),
    radial-gradient(circle at 80% 70%, rgba(46,139,192,0.22) 0%, transparent 40%);
}
.hero-content { position: relative; max-width: 900px; margin: 0 auto; }
.hero h1 {
  font-size: 48px;
  font-weight: 700;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}
.hero p {
  font-size: 19px;
  opacity: 0.92;
  max-width: 720px;
  margin: 0 auto 32px;
}
.hero-badges {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 36px;
}
.badge {
  background: rgba(255,255,255,0.15);
  padding: 10px 18px;
  border-radius: 30px;
  font-size: 14px;
  border: 1px solid rgba(255,255,255,0.25);
}

/* Secondary hero (for subpages) */
.page-hero {
  background: linear-gradient(135deg, #0f4c81, #1a6ba8);
  color: #fff;
  padding: 70px 32px 60px;
  text-align: center;
}
.page-hero h1 {
  font-size: 40px;
  margin-bottom: 12px;
  font-weight: 700;
}
.page-hero p {
  font-size: 17px;
  opacity: 0.9;
  max-width: 720px;
  margin: 0 auto;
}
.breadcrumb {
  margin-top: 14px;
  font-size: 13px;
  opacity: 0.8;
}
.breadcrumb a { color: #fff; }
.breadcrumb a:hover { text-decoration: underline; }

/* ===== Sections ===== */
section { padding: 80px 32px; }
.container { max-width: 1200px; margin: 0 auto; }
.section-header { text-align: center; margin-bottom: 50px; }
.section-header.left { text-align: left; margin-bottom: 30px; }
.section-header h2 {
  font-size: 34px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--primary);
}
.section-header p {
  font-size: 17px;
  color: var(--text-muted);
  max-width: 700px;
  margin: 0 auto;
}
.section-header.left p { margin: 0; }

.bg-soft { background: var(--bg-soft); }
.bg-primary {
  background: linear-gradient(135deg, var(--primary), #1a6ba8);
  color: #fff;
}
.bg-primary h2 { color: #fff; }
.bg-primary .section-header p { color: rgba(255,255,255,0.88); }

/* ===== Grids ===== */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px; }

/* ===== Cards ===== */
.card {
  padding: 30px;
  border-radius: 12px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  transition: transform 0.2s, box-shadow 0.2s;
}
.card.white { background: #fff; }
.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(15,76,129,0.1);
}
.card-icon {
  width: 50px; height: 50px;
  border-radius: 10px;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 16px;
}
.card h3 { font-size: 19px; margin-bottom: 10px; color: var(--primary); }
.card p { color: var(--text-muted); font-size: 15px; }

/* ===== Product Cards ===== */
.product-card {
  background: #fff;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--border);
  transition: transform 0.2s, box-shadow 0.2s;
  display: flex;
  flex-direction: column;
}
.product-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 40px rgba(15,76,129,0.12);
}
.product-header {
  padding: 28px;
  color: #fff;
}
.product-header h3 { font-size: 26px; margin-bottom: 6px; font-weight: 700; }
.product-header p { font-size: 14px; opacity: 0.9; }
.cpower-header { background: linear-gradient(135deg, #2c3e50, #34495e); }
.geopower-header { background: linear-gradient(135deg, #c0392b, #e74c3c); }
.biopower-header { background: linear-gradient(135deg, #27ae60, #2ecc71); }

.product-body { padding: 28px; flex-grow: 1; display: flex; flex-direction: column; }
.product-body h4 {
  font-size: 13px;
  color: var(--primary);
  font-weight: 600;
  margin-bottom: 14px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.module-list {
  list-style: none;
  margin-bottom: 20px;
  flex-grow: 1;
}
.module-list li {
  padding: 10px 0;
  border-bottom: 1px solid #f0f3f7;
  font-size: 14px;
  color: #3a4a5a;
  display: flex;
  align-items: flex-start;
  gap: 10px;
}
.module-list li:last-child { border-bottom: none; }
.module-list li::before {
  content: '→';
  color: var(--accent);
  font-weight: 700;
  flex-shrink: 0;
}

/* ===== Module chips ===== */
.module-chip {
  background: linear-gradient(135deg, var(--bg-soft), #fff);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  text-align: center;
}
.module-chip strong {
  display: block;
  color: var(--primary);
  font-size: 15px;
  margin-bottom: 4px;
}
.module-chip span {
  font-size: 13px;
  color: var(--text-muted);
}

/* ===== Module Detail Table ===== */
.module-table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  background: #fff;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--border);
  font-size: 14px;
}
.module-table th {
  background: var(--primary);
  color: #fff;
  padding: 14px;
  text-align: left;
  font-weight: 600;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.module-table td {
  padding: 14px;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  vertical-align: top;
}
.module-table tr:last-child td { border-bottom: none; }
.module-table tr:nth-child(even) td { background: var(--bg-soft); }
.module-table code {
  background: #eef2f7;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 12px;
  color: var(--primary-dark);
  font-family: 'Consolas', monospace;
}

/* ===== Industrial grid ===== */
.ind-item {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  padding: 24px;
  border-radius: 10px;
  backdrop-filter: blur(10px);
  text-align: center;
}
.ind-item strong {
  color: var(--accent);
  font-size: 24px;
  display: block;
  margin-bottom: 8px;
}
.ind-item span { font-size: 14px; opacity: 0.9; }

/* ===== Use case row ===== */
.use-case {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 24px;
  padding: 28px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  margin-bottom: 20px;
}
.use-case .uc-num {
  font-size: 42px;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
}
.use-case h3 {
  font-size: 21px;
  color: var(--primary);
  margin-bottom: 10px;
}
.use-case p { color: var(--text-muted); }

/* ===== Contact form ===== */
.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 40px;
  align-items: start;
}
.contact-info { padding: 30px; background: var(--bg-soft); border-radius: 12px; }
.contact-info h3 { color: var(--primary); margin-bottom: 16px; font-size: 22px; }
.contact-info .info-item { margin-bottom: 18px; }
.contact-info .info-item strong {
  display: block;
  color: var(--primary);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
}
.contact-info .info-item a { color: var(--text); }
.contact-info .info-item a:hover { color: var(--primary); }

.contact-form {
  background: #fff;
  padding: 36px;
  border-radius: 12px;
  border: 1px solid var(--border);
  box-shadow: 0 4px 16px rgba(15,76,129,0.06);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 18px; }
.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 6px;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 15px;
  font-family: inherit;
  color: var(--text);
  background: #fff;
  transition: border 0.2s, box-shadow 0.2s;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(15,76,129,0.1);
}
.form-group textarea { resize: vertical; min-height: 120px; }
.form-note {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 10px;
  text-align: center;
}
.form-success {
  display: none;
  padding: 16px;
  background: #e8f5e9;
  border: 1px solid #27ae60;
  color: #1b5e20;
  border-radius: 8px;
  margin-bottom: 16px;
  text-align: center;
}

/* ===== Docs page ===== */
.docs-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 40px;
}
.docs-nav {
  position: sticky;
  top: 100px;
  align-self: start;
  padding: 20px;
  background: var(--bg-soft);
  border-radius: 10px;
  border: 1px solid var(--border);
}
.docs-nav h4 {
  font-size: 13px;
  color: var(--primary);
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.docs-nav ul { list-style: none; }
.docs-nav li { margin-bottom: 8px; }
.docs-nav a {
  font-size: 14px;
  color: var(--text-muted);
  padding: 6px 0;
  display: block;
}
.docs-nav a:hover { color: var(--primary); }

.docs-content h2 {
  color: var(--primary);
  font-size: 26px;
  margin: 30px 0 14px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--border);
}
.docs-content h2:first-child { margin-top: 0; }
.docs-content h3 {
  color: var(--primary-dark);
  font-size: 19px;
  margin: 24px 0 10px;
}
.docs-content p { margin-bottom: 14px; color: var(--text); }
.docs-content ul, .docs-content ol {
  margin: 0 0 16px 22px;
  color: var(--text);
}
.docs-content li { margin-bottom: 6px; }
.docs-content code {
  background: #eef2f7;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 13px;
  color: var(--primary-dark);
  font-family: 'Consolas', monospace;
}
.docs-content pre {
  background: #1a2332;
  color: #e8ecf1;
  padding: 16px;
  border-radius: 8px;
  overflow-x: auto;
  font-size: 13px;
  margin: 14px 0;
}
.docs-content pre code {
  background: transparent;
  color: inherit;
  padding: 0;
}

/* ===== CTA / Footer ===== */
footer.site-footer {
  background: #0f1e2e;
  color: #9aa5b1;
  padding: 50px 32px 30px;
}
.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 36px;
}
.footer-brand img {
  height: 50px;
  width: 50px;
  margin-bottom: 12px;
  filter: brightness(1.2);
}
.footer-brand .brand-text {
  color: #fff;
  font-size: 22px;
  margin-bottom: 8px;
}
.footer-brand p { font-size: 14px; max-width: 300px; }
.footer-col h5 {
  color: #fff;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 14px;
}
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 8px; font-size: 14px; }
.footer-col a:hover { color: #f39c12; }
.footer-bottom {
  max-width: 1200px;
  margin: 36px auto 0;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.1);
  font-size: 13px;
  text-align: center;
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .grid-3, .grid-4, .grid-2, .contact-wrapper, .docs-layout { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .docs-nav { position: static; }
  .footer-content { grid-template-columns: 1fr 1fr; }
  .hero h1 { font-size: 34px; }
  .hero p { font-size: 17px; }
  .page-hero h1 { font-size: 28px; }
  .section-header h2 { font-size: 26px; }
  .nav-links { display: none; }
  .nav-links.mobile-open {
    display: flex;
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    background: #fff;
    flex-direction: column;
    padding: 20px;
    border-bottom: 1px solid var(--border);
    gap: 14px;
  }
  .mobile-toggle { display: block; }
}
@media (max-width: 600px) {
  section { padding: 60px 20px; }
  .hero { padding: 70px 20px 80px; }
  .nav { padding: 12px 20px; }
  .footer-content { grid-template-columns: 1fr; }
}