/*
 * Fo Gas - Modern Clean Design
 * Green/Teal Theme - Scroll Layout
 */

/* ─── Reset & Base ─────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  color: #1e293b; background: #f8fafc; line-height: 1.6;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: all 0.25s ease; }
a:hover { opacity: 0.85; }
ul { list-style: none; }
h1, h2, h3, h4 { font-weight: 700; line-height: 1.25; margin-bottom: 0.5em; }
p { margin-bottom: 1em; color: #475569; }
.container { max-width: 1140px; margin: 0 auto; padding: 0 24px; }

/* ─── Colors ──────────────────────────────── */
:root {
  --primary: #059669;
  --primary-dark: #047857;
  --primary-light: #d1fae5;
  --accent: #0d9488;
  --accent-light: #ccfbf1;
  --dark: #0f172a;
  --gray: #64748b;
  --gray-light: #f1f5f9;
  --border: #e2e8f0;
  --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.05), 0 10px 15px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 25px rgba(0,0,0,0.08);
  --radius: 12px;
  --radius-sm: 8px;
}

/* ─── Navigation ──────────────────────────── */
.site-header {
  position: sticky; top: 0; z-index: 1000;
  background: rgba(255,255,255,0.97); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 24px; max-width: 1140px; margin: 0 auto; height: 72px;
}
.site-logo {
  display: flex; align-items: center; gap: 10px;
  font-weight: 800; font-size: 22px; color: var(--dark);
}
.logo-dot {
  width: 36px; height: 36px; border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 18px;
}
.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a {
  padding: 8px 18px; font-size: 14px; font-weight: 500;
  color: var(--gray); border-radius: var(--radius-sm);
  transition: all 0.2s;
}
.nav-links a:hover, .nav-links a.active { color: var(--dark); background: var(--gray-light); }
.nav-cta {
  background: linear-gradient(135deg, var(--primary), var(--accent)) !important;
  color: #fff !important; padding: 9px 22px !important; border-radius: var(--radius-sm) !important;
  font-weight: 600 !important;
}
.nav-cta:hover { transform: translateY(-1px); box-shadow: 0 4px 12px rgba(5,150,105,0.3) !important; }
.hamburger { display: none; flex-direction: column; cursor: pointer; gap: 5px; padding: 4px; }
.hamburger span { width: 22px; height: 2px; background: var(--dark); border-radius: 2px; transition: all 0.3s; }

/* ─── Hero ────────────────────────────────── */
.hero {
  min-height: 85vh; display: flex; align-items: center;
  background: linear-gradient(135deg, #ecfdf5 0%, #f0fdfa 50%, #f8fafc 100%);
  position: relative; overflow: hidden;
}
.hero::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse at 20% 50%, rgba(5,150,105,0.08) 0%, transparent 50%),
              radial-gradient(ellipse at 80% 20%, rgba(13,148,136,0.06) 0%, transparent 50%);
}
.hero .container { position: relative; z-index: 2; }
.hero-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 16px; background: var(--primary-light); color: var(--primary-dark);
  border-radius: 50px; font-size: 13px; font-weight: 600; margin-bottom: 20px;
}
.hero-title {
  font-size: clamp(36px, 5vw, 56px); font-weight: 800;
  line-height: 1.08; letter-spacing: -1px; margin-bottom: 16px;
  color: var(--dark);
}
.hero-title span { background: linear-gradient(135deg, var(--primary), var(--accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.hero-desc { font-size: 17px; color: var(--gray); line-height: 1.7; margin-bottom: 28px; max-width: 520px; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 40px; }
.hero-stats { display: flex; gap: 32px; flex-wrap: wrap; }
.hero-stat { text-align: center; }
.hero-stat-num { display: block; font-size: 28px; font-weight: 800; color: var(--primary); }
.hero-stat-lbl { font-size: 13px; color: var(--gray); }

.hero-visual {
  display: flex; align-items: center; justify-content: center;
  position: relative;
}
.hero-card-wrap {
  background: #fff; border-radius: 20px; padding: 32px;
  box-shadow: var(--shadow-lg); width: 100%; max-width: 420px;
}
.hero-card-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.hero-card-item {
  background: var(--gray-light); border-radius: var(--radius-sm);
  padding: 16px; text-align: center;
}
.hero-card-icon { font-size: 28px; margin-bottom: 4px; }
.hero-card-item h4 { font-size: 13px; font-weight: 600; color: var(--dark); margin: 0; }

/* ─── Buttons ─────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 28px; font-size: 15px; font-weight: 600;
  border-radius: var(--radius-sm); border: none; cursor: pointer;
  transition: all 0.25s; line-height: 1; white-space: nowrap;
}
.btn:active { transform: scale(0.97); }
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff; box-shadow: 0 4px 12px rgba(5,150,105,0.25);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(5,150,105,0.35); color: #fff; }
.btn-outline {
  background: transparent; color: var(--dark); border: 2px solid var(--border);
}
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }
.btn-large { padding: 16px 32px; font-size: 16px; }
.btn-block { width: 100%; justify-content: center; }
.btn-ghost {
  background: var(--primary-light); color: var(--primary-dark);
  padding: 10px 18px; font-size: 14px;
}
.btn-ghost:hover { background: #a7f3d0; }

/* ─── Sections ────────────────────────────── */
.section { padding: 80px 0; }
.section-header { text-align: center; max-width: 640px; margin: 0 auto 50px; }
.section-tag {
  display: inline-block; font-size: 12px; font-weight: 700;
  text-transform: uppercase; letter-spacing: 2px;
  color: var(--primary); margin-bottom: 10px;
}
.section-header h2 { font-size: clamp(26px, 3.5vw, 38px); color: var(--dark); }
.section-header p { color: var(--gray); font-size: 16px; }

/* ─── Features Grid ───────────────────────── */
.features-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.feature-card {
  background: #fff; border: 1px solid var(--border);
  border-radius: var(--radius); padding: 32px 24px;
  transition: all 0.3s; box-shadow: var(--shadow);
}
.feature-card:hover {
  transform: translateY(-4px); box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}
.feature-icon { font-size: 36px; margin-bottom: 14px; display: block; }
.feature-card h3 { font-size: 17px; margin-bottom: 8px; }
.feature-card p { font-size: 14px; color: var(--gray); line-height: 1.6; }

/* ─── Product Cards ───────────────────────── */
.products-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}
.product-card {
  background: #fff; border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden;
  transition: all 0.3s; box-shadow: var(--shadow);
}
.product-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: transparent; }
.product-card-img {
  height: 200px; overflow: hidden; background: var(--gray-light);
  display: flex; align-items: center; justify-content: center;
}
.product-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s; }
.product-card:hover .product-card-img img { transform: scale(1.05); }
.product-card-body { padding: 20px; }
.product-card-cat { font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: 1px; color: var(--primary); margin-bottom: 6px; }
.product-card-body h3 { font-size: 16px; }
.product-card-body p { font-size: 13px; color: var(--gray); }
.product-card-link { font-size: 13px; font-weight: 600; color: var(--primary); margin-top: 10px; display: flex; align-items: center; gap: 4px; }

/* ─── Project Cards ───────────────────────── */
.projects-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 20px;
}
.project-card {
  position: relative; border-radius: var(--radius); overflow: hidden;
  height: 320px; background-size: cover; background-position: center;
  display: flex; align-items: flex-end; transition: all 0.3s;
}
.project-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.project-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(15,23,42,0.9) 0%, transparent 60%);
}
.project-body { position: relative; z-index: 2; padding: 24px; color: #fff; width: 100%; }
.project-body .client { font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: 1px; color: #6ee7b7; margin-bottom: 4px; display: block; }
.project-body h3 { font-size: 18px; color: #fff; margin-bottom: 4px; }
.project-body .loc { font-size: 13px; color: rgba(255,255,255,0.5); }

/* ─── Article Cards ───────────────────────── */
.articles-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 20px;
}
.article-card {
  background: #fff; border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden; transition: all 0.3s;
}
.article-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.article-card-img { height: 180px; background-size: cover; background-position: center; background-color: var(--gray-light); }
.article-card-body { padding: 20px; }
.article-date { font-size: 12px; color: var(--gray); }
.article-card-body h3 { font-size: 16px; line-height: 1.4; }
.article-card-body p { font-size: 13px; color: var(--gray); }

/* ─── Gallery ─────────────────────────────── */
.gallery-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px;
}
.gallery-item { border-radius: var(--radius-sm); overflow: hidden; position: relative; aspect-ratio: 4/3; }
.gallery-item img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s; }
.gallery-item:hover img { transform: scale(1.06); }
.gallery-overlay {
  position: absolute; inset: 0; background: rgba(15,23,42,0.6);
  display: flex; align-items: flex-end; padding: 16px;
  opacity: 0; transition: opacity 0.3s;
}
.gallery-item:hover .gallery-overlay { opacity: 1; }
.gallery-overlay span { color: #fff; font-size: 14px; font-weight: 500; }

/* ─── Contact ─────────────────────────────── */
.contact-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.contact-form-card {
  background: #fff; border: 1px solid var(--border);
  border-radius: var(--radius); padding: 36px; box-shadow: var(--shadow);
}
.contact-form-card h2 { font-size: 24px; margin-bottom: 6px; }
.contact-form-card > p { color: var(--gray); margin-bottom: 24px; font-size: 15px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 13px; font-weight: 600; color: var(--dark); margin-bottom: 4px; }
.form-control {
  width: 100%; padding: 12px 14px; border: 1px solid var(--border);
  border-radius: var(--radius-sm); font-family: inherit; font-size: 14px;
  transition: all 0.2s; background: #fff;
}
.form-control:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(5,150,105,0.1); }
.form-textarea { resize: vertical; min-height: 120px; }
.form-error { font-size: 12px; color: #dc2626; margin-top: 2px; display: block; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

.contact-info-card {
  background: #fff; border: 1px solid var(--border);
  border-radius: var(--radius); padding: 32px; box-shadow: var(--shadow);
  margin-bottom: 20px;
}
.contact-info-card h3 { font-size: 18px; margin-bottom: 16px; }
.contact-item { display: flex; gap: 14px; margin-bottom: 18px; }
.contact-icon { font-size: 20px; width: 36px; height: 36px; display: flex; align-items: center; justify-content: center; background: var(--primary-light); border-radius: 8px; flex-shrink: 0; }
.contact-item h4 { font-size: 13px; color: var(--gray); margin-bottom: 2px; font-weight: 600; }
.contact-item a { color: var(--primary); font-weight: 500; }
.contact-item p { font-size: 14px; margin: 0; }
.hours-row { display: flex; justify-content: space-between; padding: 6px 0; font-size: 14px; }
.hours-row span:first-child { font-weight: 500; }

/* ─── Page Hero ───────────────────────────── */
.page-hero {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  padding: 80px 0 60px; text-align: center; color: #fff;
}
.page-hero h1 { font-size: clamp(28px, 4vw, 42px); margin-bottom: 8px; }
.page-hero p { font-size: 16px; color: rgba(255,255,255,0.8); max-width: 500px; margin: 0 auto; }

/* ─── Products Layout ─────────────────────── */
.products-layout { display: grid; grid-template-columns: 240px 1fr; gap: 30px; align-items: start; }
.products-sidebar { position: sticky; top: 90px; }
.sidebar-card {
  background: #fff; border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); margin-bottom: 16px;
}
.sidebar-card h3 { font-size: 15px; margin-bottom: 12px; }
.category-list a {
  display: flex; justify-content: space-between; padding: 8px 10px;
  border-radius: 6px; font-size: 13px; color: var(--gray); transition: all 0.2s;
}
.category-list a:hover, .category-list a.active { background: var(--primary-light); color: var(--primary-dark); }
.search-box { display: flex; gap: 8px; }
.search-input { flex: 1; padding: 9px 12px; border: 1px solid var(--border); border-radius: 6px; font-size: 13px; }
.search-btn { padding: 9px 14px; background: var(--primary); color: #fff; border: none; border-radius: 6px; cursor: pointer; font-size: 13px; }
.products-toolbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }

/* ─── Product Detail ──────────────────────── */
.product-detail { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; }
.product-main-img { border-radius: var(--radius); overflow: hidden; background: var(--gray-light); aspect-ratio: 4/3; display: flex; align-items: center; justify-content: center; }
.product-main-img img { width: 100%; height: 100%; object-fit: contain; }
.product-tabs { margin-top: 50px; }
.tabs-nav { display: flex; gap: 4px; border-bottom: 2px solid var(--border); margin-bottom: 24px; }
.tab-link { padding: 10px 20px; font-size: 13px; font-weight: 600; color: var(--gray); cursor: pointer; border-bottom: 2px solid transparent; margin-bottom: -2px; transition: all 0.2s; background: none; border-top: none; border-left: none; border-right: none; }
.tab-link:hover, .tab-link.active { color: var(--primary); border-bottom-color: var(--primary); }
.tab-panel { display: none; padding: 4px 0; }
.tab-panel.active { display: block; }
.tab-panel { line-height: 1.8; color: #475569; font-size: 15px; }
.tab-panel p { margin-bottom: 1em; }
.tab-panel img { max-width: 100%; height: auto; border-radius: 8px; margin: 12px 0; }
.tab-panel table { width: 100%; border-collapse: collapse; margin-bottom: 1em; font-size: 14px; }
.tab-panel table td, .tab-panel table th { padding: 10px 14px; border: 1px solid #e2e8f0; text-align: left; }
.tab-panel table th { background: #f8fafc; font-weight: 600; }
.tab-panel table tr:nth-child(even) { background: #fafafa; }
.tab-panel ul, .tab-panel ol { padding-left: 20px; margin-bottom: 1em; }
.tab-panel li { margin-bottom: 4px; }
.tab-panel h1, .tab-panel h2, .tab-panel h3, .tab-panel h4 { margin-top: 1.2em; margin-bottom: 0.5em; color: #0f172a; font-weight: 700; }
.tab-panel h2 { font-size: 22px; }
.tab-panel h3 { font-size: 18px; }
.tab-panel h4 { font-size: 16px; }

/* ─── Project Detail ──────────────────────── */
.project-detail { max-width: 800px; margin: 0 auto; }
.project-detail-meta {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-bottom: 32px;
}
.meta-box { background: #fff; border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 16px; text-align: center; }
.meta-box .label { font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: 1px; color: var(--gray); }
.meta-box .value { font-size: 15px; font-weight: 600; color: var(--dark); }
.project-content { font-size: 15px; line-height: 1.8; color: var(--dark); }

/* ─── Article Detail ──────────────────────── */
.article-detail { max-width: 720px; margin: 0 auto; }
.article-detail .summary { font-size: 18px; color: var(--gray); line-height: 1.7; margin-bottom: 24px; padding: 20px; border-left: 3px solid var(--primary); background: var(--gray-light); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; }
.article-detail .content { font-size: 15px; line-height: 1.8; }
.article-detail .content h2, .article-detail .content h3 { color: var(--dark); margin-top: 28px; }
.article-detail .content img { border-radius: var(--radius-sm); margin: 16px 0; }

/* ─── Pagination ──────────────────────────── */
.pagination { display: flex; justify-content: center; gap: 4px; margin-top: 40px; }
.page-link {
  display: flex; align-items: center; justify-content: center;
  min-width: 38px; height: 38px; padding: 0 10px;
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  font-size: 13px; color: var(--gray); transition: all 0.2s;
}
.page-link:hover, .page-link.active { background: var(--primary); color: #fff; border-color: var(--primary); }

/* ─── Footer ──────────────────────────────── */
.site-footer {
  background: var(--dark); color: #fff; padding: 60px 0 0;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 2fr; gap: 40px; }
.footer-brand h3 { font-size: 20px; background: linear-gradient(135deg, #34d399, #5eead4); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.footer-brand p { color: rgba(255,255,255,0.5); font-size: 14px; }
.footer-col h4 { font-size: 15px; margin-bottom: 16px; color: #fff; }
.footer-col ul li { margin-bottom: 8px; }
.footer-col a { font-size: 13px; color: rgba(255,255,255,0.5); }
.footer-col a:hover { color: #34d399; }
.footer-contact li { font-size: 13px; color: rgba(255,255,255,0.5); margin-bottom: 8px; }
.footer-contact .label { color: rgba(255,255,255,0.7); font-weight: 600; }
.footer-contact a { color: #34d399; }
.footer-bottom { margin-top: 50px; padding: 20px 0; border-top: 1px solid rgba(255,255,255,0.08); text-align: center; }
.footer-bottom p { font-size: 13px; color: rgba(255,255,255,0.3); margin: 0; }

/* ─── Flash Messages ──────────────────────── */
.flash-container { position: fixed; top: 84px; right: 24px; z-index: 9999; display: flex; flex-direction: column; gap: 8px; }
.flash-message { padding: 12px 18px; border-radius: var(--radius-sm); font-size: 14px; display: flex; align-items: center; gap: 10px; box-shadow: var(--shadow-lg); max-width: 360px; }
.flash-success { background: var(--primary); color: #fff; }
.flash-error { background: #dc2626; color: #fff; }
.flash-info { background: #2563eb; color: #fff; }
.flash-close { background: none; border: none; color: inherit; font-size: 18px; cursor: pointer; margin-left: auto; line-height: 1; }

/* ─── Animations ──────────────────────────── */
.fade-up { opacity: 0; transform: translateY(24px); transition: all 0.5s ease; }
.fade-up.show { opacity: 1; transform: translateY(0); }
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }

/* ─── Media Detail ────────────────────────── */
.media-detail { max-width: 800px; margin: 0 auto; }
.media-detail-image { border-radius: var(--radius); overflow: hidden; margin: 20px 0; }
.embed-video { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; border-radius: var(--radius); }
.embed-video iframe, .embed-video video { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }

/* ─── About Page ──────────────────────────── */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; }
.about-text h2 { font-size: 30px; }
.about-text p { font-size: 15px; }
.about-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.about-stat {
  background: #fff; border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px; text-align: center; box-shadow: var(--shadow);
}
.about-stat .num { display: block; font-size: 30px; font-weight: 800; color: var(--primary); }
.about-stat .lbl { font-size: 13px; color: var(--gray); font-weight: 500; }

/* ─── Gallery Filters ─────────────────────── */
.gallery-filters { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 24px; }
.filter-btn { padding: 7px 16px; border: 1px solid var(--border); border-radius: 6px; background: #fff; color: var(--gray); font-size: 13px; cursor: pointer; transition: all 0.2s; }
.filter-btn:hover, .filter-btn.active { background: var(--primary); color: #fff; border-color: var(--primary); }

/* ─── Empty State ─────────────────────────── */
.empty-state { text-align: center; padding: 60px 20px; }
.empty-state .icon { font-size: 48px; margin-bottom: 16px; }
.empty-state h3 { font-size: 20px; }
.empty-state p { color: var(--gray); }

/* ─── Back to Top ─────────────────────────── */
.back-to-top {
  position: fixed; bottom: 24px; right: 24px; z-index: 999;
  width: 42px; height: 42px; border-radius: 50%;
  background: var(--primary); color: #fff; display: flex;
  align-items: center; justify-content: center; font-size: 18px;
  box-shadow: 0 4px 12px rgba(5,150,105,0.3);
  opacity: 0; visibility: hidden; transform: translateY(12px); transition: all 0.3s;
}
.back-to-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }

/* ─── Responsive ──────────────────────────── */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { display: none; }
  .features-grid { grid-template-columns: 1fr 1fr; }
  .contact-layout { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; }
  .products-layout { grid-template-columns: 1fr; }
  .products-sidebar { position: static; }
  .product-detail { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .project-detail-meta { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .nav-links { display: none; position: fixed; top: 72px; left: 0; right: 0; background: #fff; border-bottom: 1px solid var(--border); flex-direction: column; padding: 16px; gap: 4px; box-shadow: var(--shadow-md); }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 16px; width: 100%; }
  .hamburger { display: flex; }
  .features-grid { grid-template-columns: 1fr; }
  .hero-stats { gap: 20px; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .projects-grid { grid-template-columns: 1fr; }
  .gallery-grid { grid-template-columns: 1fr 1fr; }
  .project-detail-meta { grid-template-columns: 1fr; }
  .about-stats { grid-template-columns: 1fr 1fr; }
  .section { padding: 50px 0; }
}
@media (max-width: 480px) {
  .hero-actions { flex-direction: column; }
  .btn { width: 100%; justify-content: center; }
  .gallery-grid { grid-template-columns: 1fr; }
  .about-stats { grid-template-columns: 1fr; }
  .container { padding: 0 16px; }
}