:root {
  --primary-color: #0088cc;
  --primary-hover: #006699;
  --bg-color: #f8f9fa;
  --text-dark: #1a1a1a;
  --text-muted: #555555;
  --white: #ffffff;
  --section-padding: 80px 5%;
  --border-radius: 8px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Lato", sans-serif;
}

body {
  background-color: var(--bg-color);
  color: var(--text-dark);
  line-height: 1.6;
}

a {
  text-decoration: none;
  color: inherit;
}

ul {
  list-style: none;
}

.container {
  max-width: 1440px;
  margin: 0 auto;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 12px 24px;
  border-radius: 4px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s ease;
  text-align: center;
}

.btn-primary {
  background-color: var(--primary-color);
  color: var(--white);
  border: none;
}

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

.btn-outline {
  background-color: transparent;
  color: var(--primary-color);
  border: 1px solid var(--primary-color);
}

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

/* Header / Navbar */
header {
  padding: 20px 5%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: var(--bg-color);
}

.logo {
  display: flex;
  align-items: center;
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--primary-color);
}

.logo i {
  margin-right: 10px;
  font-size: 2rem;
}

nav ul {
  display: flex;
  gap: 30px;
  align-items: center;
}

nav a {
  font-weight: 500;
  font-size: 0.95rem;
}

nav a:hover {
  color: var(--primary-color);
}

/* Hero Section */
.hero {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 40px 5% 80px;
  gap: 40px;
  max-width: 1440px;
  margin: 0 auto;
}

.hero-content {
  flex: 1;
}

.hero h1 {
  font-size: 3rem;
  line-height: 1.2;
  margin-bottom: 20px;
  color: var(--text-dark);
}

.hero p {
  font-size: 1.1rem;
  color: var(--text-muted);
  margin-bottom: 30px;
  max-width: 500px;
}

.hero-buttons {
  display: flex;
  gap: 15px;
}

.hero-image {
  flex: 1;
  border-radius: var(--border-radius);
  overflow: hidden;
}

.hero-image img {
  width: 100%;
  height: auto;
  border-radius: var(--border-radius);
  object-fit: cover;
}

/* Section Headers */
.section-header {
  text-align: center;
  margin-bottom: 50px;
}

.section-header h2 {
  font-size: 2rem;
  margin-bottom: 10px;
}

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

/* Features Section */
.features {
  padding: var(--section-padding);
  background-color: var(--bg-color);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 40px;
  max-width: 1200px;
  margin: 0 auto;
}

.feature-card {
  padding: 20px 0;
}

.feature-card i {
  font-size: 1.5rem;
  margin-bottom: 15px;
  color: var(--text-dark);
}

.feature-card h3 {
  font-size: 1.1rem;
  margin-bottom: 10px;
}

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

/* Sectors & Services */
.sectors,
.services {
  padding: var(--section-padding);
  max-width: 1440px;
  margin: 0 auto;
}

.image-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
}

.image-card {
  position: relative;
  border-radius: var(--border-radius);
  overflow: hidden;
  height: 200px;
}

.image-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.image-card:hover img {
  transform: scale(1.05);
}

.image-card .overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  text-align: center;
}

.image-card h3 {
  color: var(--white);
  font-size: 1.1rem;
  font-weight: 600;
  text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.5);
}

.center-btn {
  display: flex;
  justify-content: center;
  margin-top: 40px;
}

/* How We Work */
.process {
  padding: var(--section-padding);
  background-color: var(--bg-color);
  max-width: 1440px;
  margin: 0 auto;
}

.process-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 40px;
}

.process-step h3 {
  font-size: 1.1rem;
  margin: 10px 0;
}

.process-step p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.process-step i {
  font-size: 1.5rem;
}

/* FAQs */
.faq {
  padding: var(--section-padding);
  max-width: 1440px;
  margin: 0 auto;
}

.faq-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 30px;
}

.faq-item h3 {
  font-size: 1.1rem;
  margin-bottom: 10px;
}

.faq-item p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* CTA Banner */
.cta-banner {
  position: relative;
  background-image: url("img/tanks.png");
  background-size: cover;
  background-position: center;
  color: var(--white);
  text-align: center;
  padding: 80px 20px;
  margin: 40px 5%;
  border-radius: var(--border-radius);
  overflow: hidden;
  max-width: 1440px;
  margin-inline: auto;
}

.cta-banner::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 50, 100, 0.7);
}

.cta-content {
  position: relative;
  z-index: 1;
}

.cta-banner h2 {
  font-size: 2.5rem;
  margin-bottom: 10px;
}

.cta-banner p {
  margin-bottom: 30px;
  font-size: 1.1rem;
}

/* Footer */
footer {
  background-color: var(--primary-color);
  color: var(--white);
  padding: 60px 5% 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 40px;
  max-width: 1200px;
  margin: 0 auto;
  margin-bottom: 40px;
}

.footer-logo {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.footer-logo i {
  font-size: 2.5rem;
  margin-bottom: 10px;
}

.footer-links h4,
.footer-contact h4 {
  font-size: 1.2rem;
  margin-bottom: 20px;
}

.footer-links ul li {
  margin-bottom: 10px;
}

.footer-links ul li a:hover {
  text-decoration: underline;
}

.footer-contact p {
  margin-bottom: 10px;
}

.social-icons {
  display: flex;
  gap: 15px;
  margin-top: 20px;
  font-size: 1.2rem;
}


/* =========================================
   Footer Booking Form Card
   ========================================= */
.footer-booking-card {
  background: var(--white);
  color: var(--text-dark);
  border-radius: var(--border-radius);
  padding: 40px;
  margin-bottom: 60px;
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
}

.form-header {
  text-align: center;
  border-bottom: 1px solid #e5e7eb;
  padding-bottom: 20px;
  margin-bottom: 30px;
}

.form-header i {
  font-size: 2rem;
  color: var(--primary-color);
  background: rgba(0, 136, 204, 0.1);
  padding: 15px;
  border-radius: 50%;
  margin-bottom: 15px;
}

.form-header h3 {
  font-size: 2rem;
  font-weight: 900;
  margin-bottom: 10px;
}

.form-header p {
  color: var(--text-muted);
}

.form-section {
  margin-bottom: 30px;
}

.form-section h4 {
  font-size: 1.1rem;
  font-weight: 700;
  border-bottom: 1px solid #e5e7eb;
  padding-bottom: 8px;
  margin-bottom: 20px;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group.full-width {
  grid-column: 1 / -1;
}

.form-group label {
  font-weight: 700;
  font-size: 0.9rem;
}

.form-group input[type="text"],
.form-group input[type="tel"],
.form-group input[type="email"],
.form-group input[type="number"],
.form-group input[type="datetime-local"],
.form-group select {
  width: 100%;
  padding: 12px;
  border: 1px solid #d1d5db;
  border-radius: 4px;
  font-family: inherit;
  font-size: 1rem;
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(0, 136, 204, 0.1);
}

.checkbox-group-wrapper {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 15px;
  background: var(--bg-color);
  padding: 20px;
  border: 1px solid #e5e7eb;
  border-radius: 4px;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 400 !important;
  cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--primary-color);
}

.submit-btn {
  width: 100%;
  padding: 15px;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--white);
  background-color: var(--primary-color);
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: background-color 0.3s ease;
  margin-top: 10px;
}

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

.submit-btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

/* Validation Feedback */
.error-feedback {
  background-color: #fee2e2;
  color: #b91c1c;
  padding: 15px;
  border-radius: 4px;
  border: 1px solid #f87171;
  margin-bottom: 20px;
  text-align: center;
  font-weight: 700;
}

.success-state {
  display: none;
  text-align: center;
  padding: 40px 20px;
}

.success-state i {
  font-size: 4rem;
  color: #16a34a;
  margin-bottom: 20px;
}

.success-state h4 {
  font-size: 2rem;
  margin-bottom: 10px;
}

.btn-outline-success {
  background: transparent;
  border: 2px solid #16a34a;
  color: #16a34a;
  padding: 10px 20px;
  border-radius: 4px;
  font-weight: 700;
  margin-top: 20px;
  cursor: pointer;
}


/* Responsive Design */
@media (max-width: 900px) {
  /* Navbar Mobile Adjustments */
  .menu-toggle {
    display: block; /* Show hamburger icon */
  }

  nav ul {
    display: none; /* Hide menu by default */
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background-color: var(--white);
    padding: 20px 0;
    box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
  }

  nav ul.active {
    display: flex; /* Show menu when active class is toggled */
  }

  nav ul li {
    width: 100%;
    text-align: center;
    margin-bottom: 15px;
  }

  nav ul li:last-child {
    margin-bottom: 0;
  }

  /* Layout Adjustments */
  .hero {
    flex-direction: column;
    text-align: center;
    padding-top: 20px;
  }

  .hero-buttons {
    justify-content: center;
    flex-direction: column;
  }

  .hero p {
    margin: 0 auto 30px;
  }

  /* Adjust Heading Sizes for Mobile */
  .hero h1 {
    font-size: 2.2rem; /* Reduced from 3.5rem */
  }

  .section-header h2 {
    font-size: 1.6rem; /* Reduced from 2rem */
  }

  .cta-banner {
    margin-inline: 5%;
  }

  .cta-banner h2 {
    font-size: 1.8rem; /* Reduced from 2.5rem */
  }

  .feature-card h3,
  .process-step h3,
  .image-card h3 {
    font-size: 1.1rem; /* Slightly smaller for compactness */
  }
  
  /* =========================================
     Form Mobile Adjustments
     ========================================= */
  .form-grid {
    grid-template-columns: 1fr; /* Stack form inputs vertically */
  }
  
  .footer-booking-card {
    padding: 25px 15px;
  }
}