/* DRB Engineering Ltd - Stylesheet */
:root {
  --navy: #0d2b4e;
  --navy-dark: #081e38;
  --gray: #6b7280;
  --gray-light: #9ca3af;
  --green: #2e7d32;
  --green-light: #4caf50;
  --white: #ffffff;
  --off-white: #f8f9fa;
  --text: #1f2937;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  color: var(--text);
  background: url('../images/bg-platform.jpg') center center / cover no-repeat fixed;
  background-color: #f5f7fa;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
header {
  background: var(--white);
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
}

.logo img {
  height: 70px;
  width: auto;
}

nav ul {
  display: flex;
  list-style: none;
  gap: 2rem;
}

nav a {
  text-decoration: none;
  color: var(--navy);
  font-weight: 600;
  transition: color 0.3s;
}

nav a:hover, nav a.active {
  color: var(--green);
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--navy);
}

/* Hero */
.hero {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-dark) 100%);
  color: var(--white);
  padding: 5rem 0;
  text-align: center;
}

.hero h1 {
  font-size: 2.8rem;
  margin-bottom: 1rem;
  font-weight: 700;
}

.hero p {
  font-size: 1.3rem;
  max-width: 700px;
  margin: 0 auto 2rem;
  opacity: 0.95;
}

.btn {
  display: inline-block;
  background: var(--green);
  color: var(--white);
  padding: 0.9rem 2rem;
  text-decoration: none;
  border-radius: 5px;
  font-weight: 600;
  transition: background 0.3s, transform 0.2s;
}

.btn:hover {
  background: var(--green-light);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--white);
  margin-left: 1rem;
}

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

/* Sections */
section {
  padding: 4rem 0;
}

.section-title {
  text-align: center;
  font-size: 2.2rem;
  color: var(--navy);
  margin-bottom: 3rem;
}

.section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: var(--green);
  margin: 1rem auto 0;
}

/* Services Grid */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.service-card {
  background: var(--off-white);
  padding: 2rem;
  border-radius: 10px;
  text-align: center;
  transition: transform 0.3s, box-shadow 0.3s;
  border-top: 4px solid var(--green);
}

.service-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 25px rgba(0,0,0,0.1);
}

.service-card h3 {
  color: var(--navy);
  margin: 1rem 0;
  font-size: 1.4rem;
}

.service-card i {
  font-size: 2.5rem;
  color: var(--green);
}

/* About Preview */
.about-preview {
  background: var(--off-white);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.about-preview img {
  width: 100%;
  border-radius: 10px;
  box-shadow: 0 5px 20px rgba(0,0,0,0.15);
}

/* Footer */
footer {
  background: var(--navy);
  color: var(--white);
  padding: 3rem 0 1.5rem;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-content h3 {
  margin-bottom: 1rem;
  color: var(--green-light);
}

.footer-content ul {
  list-style: none;
}

.footer-content a {
  color: var(--gray-light);
  text-decoration: none;
}

.footer-content a:hover {
  color: var(--white);
}

.footer-bottom {
  text-align: center;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255,255,255,0.1);
  font-size: 0.9rem;
  color: var(--gray-light);
}

/* Gallery */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  margin-top: 1rem;
}

.gallery-grid img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  /* light soft blur only where needed for privacy */
}

/* Improved contact form */
.contact-form {
  max-width: 650px;
  margin: 0 auto;
  background: var(--white);
  padding: 2.5rem;
  border-radius: 12px;
  box-shadow: 0 8px 30px rgba(0,0,0,0.08);
  border-top: 5px solid var(--green);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--green);
  box-shadow: 0 0 0 3px rgba(46, 125, 50, 0.15);
}
.contact-form {
  max-width: 600px;
  margin: 0 auto;
  background: var(--off-white);
  padding: 2.5rem;
  border-radius: 10px;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
  color: var(--navy);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.8rem;
  border: 1px solid #ddd;
  border-radius: 5px;
  font-size: 1rem;
}

.form-group textarea {
  min-height: 150px;
  resize: vertical;
}

/* Page Hero */
.page-hero {
  background: var(--navy);
  color: var(--white);
  padding: 3rem 0;
  text-align: center;
}

.page-hero h1 {
  font-size: 2.5rem;
}

/* Contact layout */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  max-width: 1000px;
  margin: 0 auto;
}

@media (max-width: 768px) {
  .contact-grid {
    grid-template-columns: 1fr;
  }
}
@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }
  
  nav ul {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--white);
    flex-direction: column;
    padding: 1rem;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
  }
  
  nav ul.active {
    display: flex;
  }
  
  .hero h1 {
    font-size: 2rem;
  }
  
  .about-preview {
    grid-template-columns: 1fr;
  }
  
  .btn-outline {
    margin-left: 0;
    margin-top: 1rem;
    display: block;
  }
}