:root {
  --color-primary: #FFC107;
  --color-primary-dark: #FFB300;
  --color-dark: #1a1a1a;
  --color-dark-2: #2d2d2d;
  --color-gray-100: #f8f9fa;
  --color-gray-200: #e9ecef;
  --color-gray-300: #dee2e6;
  --color-gray-400: #ced4da;
  --color-gray-500: #adb5bd;
  --color-gray-600: #6c757d;
  --color-gray-700: #495057;
  --color-gray-800: #343a40;
  --color-text: #212529;
  --color-text-secondary: #6c757d;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
  --transition: all 0.2s ease;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  line-height: 1.6;
  background: #fff;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }

/* Container */
.container { width: 100%; max-width: 1140px; margin: 0 auto; padding: 0 24px; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 24px; border-radius: var(--radius-md); font-size: 15px; font-weight: 500;
  text-decoration: none; border: none; cursor: pointer; transition: var(--transition);
  font-family: inherit; line-height: 1;
}
.btn-primary { background: var(--color-dark); color: #fff; }
.btn-primary:hover { background: var(--color-dark-2); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-outline { background: transparent; color: var(--color-text); border: 1.5px solid var(--color-gray-300); }
.btn-outline:hover { border-color: var(--color-dark); background: var(--color-gray-100); }
.btn-yellow { background: var(--color-primary); color: var(--color-dark); font-weight: 600; }
.btn-yellow:hover { background: var(--color-primary-dark); transform: translateY(-1px); }

/* Header */
.header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.92); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-gray-200);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.logo { font-size: 22px; font-weight: 700; color: var(--color-dark); text-decoration: none; letter-spacing: -0.5px; }
.logo span { color: var(--color-gray-500); font-weight: 400; }
.logo img { display: block; height: 32px; width: auto; }

.nav { display: flex; gap: 32px; align-items: center; }
.nav a {
  color: var(--color-gray-700); text-decoration: none; font-size: 14px; font-weight: 500;
  transition: var(--transition); position: relative;
}
.nav a:hover { color: var(--color-dark); }
.nav a::after {
  content: ''; position: absolute; bottom: -4px; left: 0; width: 0; height: 2px;
  background: var(--color-primary); transition: width 0.2s ease;
}
.nav a:hover::after { width: 100%; }

.burger {
  display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 4px;
}
.burger span { display: block; width: 24px; height: 2px; background: var(--color-dark); transition: var(--transition); }

/* Mobile menu */
.mobile-menu {
  display: none; position: fixed; inset: 68px 0 0 0; background: #fff; z-index: 99;
  flex-direction: column; padding: 32px 24px; gap: 20px;
}
.mobile-menu.active { display: flex; }
.mobile-menu a { font-size: 18px; font-weight: 500; color: var(--color-text); text-decoration: none; }
.mobile-menu .btn { margin-top: 8px; width: 100%; }

/* Hero */
.hero { padding: 80px 0 60px; position: relative; overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.hero-content h1 { font-size: 48px; font-weight: 700; line-height: 1.1; letter-spacing: -1.5px; margin-bottom: 20px; }
.hero-content h1 .highlight { color: var(--color-primary); position: relative; }
.hero-content p { font-size: 18px; color: var(--color-text-secondary); line-height: 1.7; margin-bottom: 32px; max-width: 480px; }
.hero-btns { display: flex; gap: 12px; flex-wrap: wrap; }

.hero-visual { position: relative; }
.hero-image-wrap {
  border-radius: 16px; overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,0.15);
  transform: perspective(1000px) rotateY(-3deg) rotateX(2deg);
  transition: transform 0.4s ease;
}
.hero-image-wrap:hover { transform: perspective(1000px) rotateY(0deg) rotateX(0deg); }
.hero-image-wrap img { width: 100%; height: auto; display: block; object-fit: cover; }

/* Section */
.section { padding: 80px 0; }
.section-header { text-align: center; max-width: 600px; margin: 0 auto 48px; }
.section-header h2 { font-size: 36px; font-weight: 700; letter-spacing: -1px; margin-bottom: 12px; }
.section-header p { font-size: 17px; color: var(--color-text-secondary); }

/* Services */
.services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.service-card {
  background: #fff; border: 1px solid var(--color-gray-200); border-radius: var(--radius-lg);
  padding: 32px; transition: var(--transition); position: relative; overflow: hidden;
}
.service-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: var(--color-primary); transform: scaleX(0); transition: transform 0.3s ease;
}
.service-card:hover { border-color: var(--color-gray-300); box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.service-card:hover::before { transform: scaleX(1); }
.service-icon {
  width: 48px; height: 48px; border-radius: var(--radius-md); background: var(--color-gray-100);
  display: flex; align-items: center; justify-content: center; margin-bottom: 20px; color: var(--color-dark);
}
.service-card h3 { font-size: 17px; font-weight: 600; margin-bottom: 8px; }
.service-card p { font-size: 14px; color: var(--color-text-secondary); line-height: 1.6; }

/* Stats */
.stats-section { background: var(--color-dark); color: #fff; padding: 64px 0; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; }
.stat-item { text-align: center; }
.stat-num { font-size: 42px; font-weight: 700; color: var(--color-primary); line-height: 1; font-variant-numeric: tabular-nums; margin-bottom: 8px; }
.stat-label { font-size: 14px; color: var(--color-gray-400); }

/* Calculator */
.calc-wrapper {
  max-width: 560px; margin: 0 auto; background: #fff; border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-lg); padding: 40px; box-shadow: var(--shadow-md);
}
.calc-row { margin-bottom: 20px; }
.calc-row label { display: block; font-size: 13px; font-weight: 500; color: var(--color-gray-700); margin-bottom: 6px; text-transform: uppercase; letter-spacing: 0.5px; }
.calc-row input, .calc-row select {
  width: 100%; padding: 12px 14px; border: 1.5px solid var(--color-gray-300);
  border-radius: var(--radius-md); font-size: 15px; font-family: inherit; background: #fff; color: var(--color-text); transition: var(--transition);
}
.calc-row input:focus, .calc-row select:focus { outline: none; border-color: var(--color-primary); box-shadow: 0 0 0 3px rgba(255,193,7,0.15); }
.calc-result {
  display: flex; justify-content: space-between; align-items: center;
  background: var(--color-gray-100); border-radius: var(--radius-md); padding: 20px 24px;
  margin-top: 8px; border: 1.5px solid var(--color-gray-200);
}
.calc-result-label { font-size: 14px; color: var(--color-text-secondary); }
.calc-result-value { font-size: 28px; font-weight: 700; color: var(--color-dark); font-variant-numeric: tabular-nums; }
.calc-note { font-size: 12px; color: var(--color-gray-500); margin-top: 12px; text-align: center; }

/* Process */
.process-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.process-card { text-align: center; padding: 32px 24px; border: 1px solid var(--color-gray-200); border-radius: var(--radius-lg); position: relative; background: #fff; }
.process-card:not(:last-child)::after {
  content: ''; position: absolute; top: 48px; right: -28px; width: 32px; height: 2px; background: var(--color-gray-300);
}
.process-num {
  width: 56px; height: 56px; border-radius: 50%; background: var(--color-dark); color: #fff;
  display: flex; align-items: center; justify-content: center; font-size: 20px; font-weight: 700; margin: 0 auto 16px;
}
.process-card h4 { font-size: 16px; font-weight: 600; margin-bottom: 8px; }
.process-card p { font-size: 14px; color: var(--color-text-secondary); }

/* Gallery */
.gallery-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.gallery-item {
  aspect-ratio: 16/10; background: var(--color-gray-100); border-radius: var(--radius-lg);
  display: flex; align-items: center; justify-content: center; border: 1px solid var(--color-gray-200);
  position: relative; overflow: hidden;
}
.gallery-item .placeholder { text-align: center; padding: 20px; color: var(--color-gray-500); }
.gallery-item .placeholder svg { margin: 0 auto 8px; opacity: 0.5; }
.gallery-item .placeholder span { font-size: 13px; font-weight: 500; }

/* Contact */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.contact-info h3 { font-size: 24px; font-weight: 700; margin-bottom: 24px; }
.contact-item { display: flex; gap: 16px; margin-bottom: 20px; }
.contact-icon {
  width: 44px; height: 44px; border-radius: var(--radius-md); background: var(--color-gray-100);
  display: flex; align-items: center; justify-content: center; flex-shrink: 0; color: var(--color-dark);
}
.contact-item div strong { display: block; font-weight: 600; margin-bottom: 2px; }
.contact-item div span { font-size: 14px; color: var(--color-text-secondary); }

.contact-form { background: var(--color-gray-100); padding: 32px; border-radius: var(--radius-lg); }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 13px; font-weight: 500; color: var(--color-gray-700); margin-bottom: 6px; }
.form-group input, .form-group textarea {
  width: 100%; padding: 12px 14px; border: 1.5px solid var(--color-gray-300);
  border-radius: var(--radius-md); font-size: 15px; font-family: inherit; background: #fff; transition: var(--transition);
}
.form-group input:focus, .form-group textarea:focus { outline: none; border-color: var(--color-primary); box-shadow: 0 0 0 3px rgba(255,193,7,0.15); }
.form-group textarea { min-height: 100px; resize: vertical; }

/* Footer */
.footer { background: var(--color-dark); color: var(--color-gray-400); padding: 40px 0; text-align: center; font-size: 14px; }
.footer a { color: var(--color-gray-300); text-decoration: none; }
.footer a:hover { color: #fff; }

/* Scroll reveal */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* Responsive */
@media (max-width: 992px) {
  .hero-grid { grid-template-columns: 1fr; text-align: center; gap: 40px; }
  .hero-content p { margin: 0 auto 32px; }
  .hero-btns { justify-content: center; }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .process-grid { grid-template-columns: repeat(2, 1fr); }
  .process-card:not(:last-child)::after { display: none; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .gallery-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .nav { display: none; }
  .burger { display: flex; }
  .hero { padding: 60px 0 40px; }
  .hero-content h1 { font-size: 32px; }
  .section-header h2 { font-size: 28px; }
  .services-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
  .process-grid { grid-template-columns: 1fr; }
  .gallery-grid { grid-template-columns: 1fr; }
  .calc-wrapper { padding: 24px; }
  .calc-result { flex-direction: column; gap: 8px; text-align: center; }
}