/* ===== CSS Reset & Base ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --primary: #1a5276;
  --primary-dark: #0e3a56;
  --primary-light: #2980b9;
  --accent: #e67e22;
  --accent-hover: #cf6d17;
  --text: #333333;
  --text-light: #666666;
  --bg: #ffffff;
  --bg-light: #f7f9fb;
  --bg-gray: #eef2f5;
  --border: #dde4ea;
  --white: #ffffff;
  --shadow: 0 2px 8px rgba(0,0,0,0.08);
  --shadow-lg: 0 4px 20px rgba(0,0,0,0.12);
  --radius: 6px;
  --transition: 0.3s ease;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--primary-light);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--accent);
}

h1, h2, h3, h4, h5, h6 {
  color: var(--primary);
  line-height: 1.3;
  margin-bottom: 0.5em;
}

h1 { font-size: 2.2rem; }
h2 { font-size: 1.8rem; }
h3 { font-size: 1.35rem; }
h4 { font-size: 1.15rem; }

p {
  margin-bottom: 1em;
}

ul, ol {
  padding-left: 1.5em;
  margin-bottom: 1em;
}

/* ===== Container ===== */
.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ===== Header ===== */
.site-header {
  background: var(--white);
  border-bottom: 3px solid var(--primary);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow);
}

.header-top {
  background: var(--primary);
  color: var(--white);
  padding: 8px 0;
  font-size: 0.875rem;
}

.header-top .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.header-top a {
  color: var(--white);
}

.header-top a:hover {
  color: var(--accent);
}

.header-main {
  padding: 12px 0;
}

.header-main .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.logo-icon {
  width: 44px;
  height: 44px;
  background: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.logo-icon svg {
  width: 24px;
  height: 24px;
  fill: var(--white);
}

.logo-text {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.2;
}

.logo-text span {
  display: block;
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--text-light);
}

/* ===== Navigation ===== */
.main-nav ul {
  list-style: none;
  display: flex;
  gap: 4px;
  padding: 0;
  margin: 0;
}

.main-nav a {
  display: block;
  padding: 8px 14px;
  color: var(--text);
  font-weight: 500;
  font-size: 0.95rem;
  border-radius: var(--radius);
  transition: all var(--transition);
}

.main-nav a:hover,
.main-nav a.active {
  background: var(--primary);
  color: var(--white);
}

.menu-toggle {
  display: none;
  background: none;
  border: 2px solid var(--primary);
  border-radius: var(--radius);
  padding: 6px 10px;
  cursor: pointer;
  color: var(--primary);
  font-size: 1.4rem;
  line-height: 1;
}

/* ===== Hero Section ===== */
.hero {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: var(--white);
  padding: 60px 0;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('../images/hero-water-extraction.jpg') center/cover no-repeat;
  opacity: 0.15;
}

.hero .container {
  position: relative;
  z-index: 1;
}

.hero h1 {
  color: var(--white);
  font-size: 2.5rem;
  margin-bottom: 0.5em;
  max-width: 700px;
}

.hero p {
  font-size: 1.15rem;
  max-width: 600px;
  margin-bottom: 1.5em;
  opacity: 0.95;
}

.hero-buttons {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* ===== Buttons ===== */
.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.95rem;
  text-align: center;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--accent-hover);
  color: var(--white);
}

.btn-outline {
  background: transparent;
  color: var(--white);
  border: 2px solid var(--white);
}

.btn-outline:hover {
  background: var(--white);
  color: var(--primary);
}

.btn-secondary {
  background: var(--primary-light);
  color: var(--white);
}

.btn-secondary:hover {
  background: var(--primary);
  color: var(--white);
}

/* ===== Sections ===== */
.section {
  padding: 60px 0;
}

.section-alt {
  background: var(--bg-light);
}

.section-gray {
  background: var(--bg-gray);
}

.section-title {
  text-align: center;
  margin-bottom: 40px;
}

.section-title h2 {
  margin-bottom: 0.3em;
}

.section-title p {
  color: var(--text-light);
  max-width: 600px;
  margin: 0 auto;
}

.section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background: var(--accent);
  margin: 16px auto 0;
  border-radius: 2px;
}

/* ===== Cards Grid ===== */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
  border-top: 3px solid var(--primary);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.card-icon {
  width: 48px;
  height: 48px;
  background: var(--bg-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  color: var(--primary);
}

.card-icon svg {
  width: 24px;
  height: 24px;
  fill: var(--primary);
}

.card h3 {
  margin-bottom: 0.5em;
}

.card p {
  color: var(--text-light);
  font-size: 0.95rem;
}

/* ===== About Intro ===== */
.about-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.about-intro img {
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

/* ===== Service Detail ===== */
.service-detail {
  background: var(--white);
  border-radius: var(--radius);
  padding: 32px;
  margin-bottom: 24px;
  box-shadow: var(--shadow);
  border-left: 4px solid var(--primary);
}

.service-detail h3 {
  margin-bottom: 0.5em;
}

.service-detail p {
  color: var(--text-light);
}

/* ===== Gallery ===== */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.gallery-item {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.gallery-item img {
  width: 100%;
  height: 260px;
  object-fit: cover;
  transition: transform var(--transition);
}

.gallery-item:hover img {
  transform: scale(1.05);
}

.gallery-caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(transparent, rgba(0,0,0,0.7));
  color: var(--white);
  padding: 20px 14px 12px;
  font-size: 0.875rem;
}

/* ===== Contact ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.contact-info-item {
  display: flex;
  gap: 14px;
  margin-bottom: 20px;
  align-items: flex-start;
}

.contact-info-item .icon {
  width: 40px;
  height: 40px;
  background: var(--bg-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--primary);
}

.contact-info-item .icon svg {
  width: 18px;
  height: 18px;
  fill: var(--primary);
}

.contact-info-item h4 {
  margin-bottom: 2px;
  font-size: 1rem;
}

.contact-info-item p {
  color: var(--text-light);
  font-size: 0.9rem;
  margin-bottom: 0;
}

.contact-form {
  background: var(--white);
  padding: 28px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  margin-bottom: 6px;
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--text);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-family: inherit;
  transition: border-color var(--transition);
  background: var(--white);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-light);
  box-shadow: 0 0 0 3px rgba(41,128,185,0.1);
}

.form-group textarea {
  height: 120px;
  resize: vertical;
}

/* ===== Map ===== */
.map-container {
  margin-top: 40px;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.map-container iframe {
  width: 100%;
  height: 350px;
  border: 0;
}

/* ===== Service Area ===== */
.area-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  list-style: none;
  padding: 0;
}

.area-list li {
  background: var(--white);
  padding: 14px 18px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border-left: 3px solid var(--primary);
  font-weight: 500;
}

/* ===== Page Header ===== */
.page-header {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: var(--white);
  padding: 40px 0;
  text-align: center;
}

.page-header h1 {
  color: var(--white);
  margin-bottom: 0.3em;
}

.page-header p {
  opacity: 0.9;
  max-width: 600px;
  margin: 0 auto;
}

/* ===== Breadcrumb ===== */
.breadcrumb {
  padding: 12px 0;
  background: var(--bg-light);
  font-size: 0.875rem;
}

.breadcrumb a {
  color: var(--text-light);
}

.breadcrumb span {
  color: var(--text);
  font-weight: 500;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--primary-dark);
  color: rgba(255,255,255,0.85);
  padding: 50px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 30px;
  margin-bottom: 40px;
}

.footer-col h4 {
  color: var(--white);
  margin-bottom: 16px;
  font-size: 1.05rem;
}

.footer-col p {
  font-size: 0.9rem;
  line-height: 1.6;
}

.footer-col ul {
  list-style: none;
  padding: 0;
}

.footer-col ul li {
  margin-bottom: 8px;
}

.footer-col ul a {
  color: rgba(255,255,255,0.75);
  font-size: 0.9rem;
}

.footer-col ul a:hover {
  color: var(--accent);
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.15);
  padding: 18px 0;
  text-align: center;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.6);
}

/* ===== CTA Banner ===== */
.cta-banner {
  background: var(--primary);
  color: var(--white);
  padding: 40px 0;
  text-align: center;
}

.cta-banner h2 {
  color: var(--white);
  margin-bottom: 0.3em;
}

.cta-banner p {
  opacity: 0.9;
  margin-bottom: 1.2em;
}

/* ===== Responsive ===== */
@media (max-width: 992px) {
  .cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .area-list {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  html { font-size: 15px; }

  .header-top .container {
    justify-content: center;
    text-align: center;
  }

  .header-main .container {
    flex-wrap: wrap;
  }

  .menu-toggle {
    display: block;
  }

  .main-nav {
    display: none;
    width: 100%;
    order: 3;
    padding-top: 10px;
  }

  .main-nav.open {
    display: block;
  }

  .main-nav ul {
    flex-direction: column;
    gap: 2px;
  }

  .main-nav a {
    padding: 10px 14px;
  }

  .hero {
    padding: 40px 0;
  }

  .hero h1 {
    font-size: 1.8rem;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: flex-start;
  }

  .about-intro {
    grid-template-columns: 1fr;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }

  .cards-grid {
    grid-template-columns: 1fr;
  }

  .gallery-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  .area-list {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 40px 0;
  }
}

@media (max-width: 480px) {
  .logo-text {
    font-size: 1rem;
  }
  .hero h1 {
    font-size: 1.5rem;
  }
  .btn {
    padding: 10px 20px;
    font-size: 0.9rem;
  }
}