:root {
  --primary-color: #1a4d7a;
  --secondary-color: #2c7cbd;
  --accent-color: #c8102e;
  --text-dark: #333;
  --text-light: #666;
  --background: #fff;
  --light-gray: #f8f9fa;
  --border-gray: #e0e0e0;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  color: var(--text-dark);
  background-color: var(--background);
}

/* Header */
header {
  background-color: #fff;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  position: sticky;
  top: 0;
  z-index: 1000;
}

nav {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 70px;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
  text-decoration: none;
}

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

.nav-menu li {
  position: relative;
}

.nav-menu a {
  text-decoration: none;
  color: var(--text-dark);
  font-weight: 500;
  padding: 0.5rem 0;
  transition: color 0.3s;
}

.nav-menu a:hover {
  color: var(--secondary-color);
}

/* Dropdown Menu */
.dropdown {
  position: relative;
}

.dropdown-content {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background-color: #fff;
  min-width: 200px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  border-radius: 4px;
  margin-top: 0.5rem;
  padding: 0.5rem 0;
}

.dropdown:hover .dropdown-content {
  display: block;
}

.dropdown-content a {
  display: block;
  padding: 0.75rem 1.5rem;
  color: var(--text-dark);
  text-decoration: none;
  transition: background-color 0.3s;
}

.dropdown-content a:hover {
  background-color: var(--light-gray);
  color: var(--secondary-color);
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  cursor: pointer;
  gap: 4px;
}

.menu-toggle span {
  width: 25px;
  height: 3px;
  background-color: var(--text-dark);
  transition: 0.3s;
}

/* Hero Section */
.hero {
  position: relative;
  height: 500px;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  text-align: center;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.4);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  padding: 2rem;
}

/* Hero Background Images - Responsive */
.hero-home { background-image: url('../photos/home-768w.webp'); }
.hero-basic-course { background-image: url('../photos/basic-course-768w.webp'); }
.hero-advanced { background-image: url('../photos/advanced-768w.webp'); }
.hero-refresher { background-image: url('../photos/refresher-768w.webp'); }
.hero-register { background-image: url('../photos/register-768w.webp'); }
.hero-contact { background-image: url('../photos/contact-768w.webp'); }
.hero-team { background-image: url('../photos/team-768w.webp'); }
.hero-venue { background-image: url('../photos/venue-768w.webp'); }
.hero-terms { background-image: url('../photos/terms-and-conditions-768w.webp'); }
.hero-education { background-image: url('../photos/education-768w.webp'); }
.hero-faq { background-image: url('../photos/faq-768w.webp'); }

@media (min-width: 769px) {
  .hero-home { background-image: url('../photos/home-1440w.webp'); }
  .hero-basic-course { background-image: url('../photos/basic-course-1440w.webp'); }
  .hero-advanced { background-image: url('../photos/advanced-1440w.webp'); }
  .hero-refresher { background-image: url('../photos/refresher-1440w.webp'); }
  .hero-register { background-image: url('../photos/register-1440w.webp'); }
  .hero-contact { background-image: url('../photos/contact-1440w.webp'); }
  .hero-team { background-image: url('../photos/team-1440w.webp'); }
  .hero-venue { background-image: url('../photos/venue-1440w.webp'); }
  .hero-terms { background-image: url('../photos/terms-and-conditions-1440w.webp'); }
  .hero-education { background-image: url('../photos/education-1440w.webp'); }
  .hero-faq { background-image: url('../photos/faq-1440w.webp'); }
}

@media (min-width: 1441px) {
  .hero-home { background-image: url('../photos/home-1920w.webp'); }
  .hero-basic-course { background-image: url('../photos/basic-course-1920w.webp'); }
  .hero-advanced { background-image: url('../photos/advanced-1920w.webp'); }
  .hero-refresher { background-image: url('../photos/refresher-1920w.webp'); }
  .hero-register { background-image: url('../photos/register-1920w.webp'); }
  .hero-contact { background-image: url('../photos/contact-1920w.webp'); }
  .hero-team { background-image: url('../photos/team-1920w.webp'); }
  .hero-venue { background-image: url('../photos/venue-1920w.webp'); }
  .hero-terms { background-image: url('../photos/terms-and-conditions-1920w.webp'); }
  .hero-education { background-image: url('../photos/education-1920w.webp'); }
  .hero-faq { background-image: url('../photos/faq-1920w.webp'); }
}

@media (min-width: 1921px) {
  .hero-home { background-image: url('../photos/home.webp'); }
  .hero-basic-course { background-image: url('../photos/basic-course.webp'); }
  .hero-advanced { background-image: url('../photos/advanced.webp'); }
  .hero-refresher { background-image: url('../photos/refresher.webp'); }
  .hero-register { background-image: url('../photos/register.webp'); }
  .hero-contact { background-image: url('../photos/contact.webp'); }
  .hero-team { background-image: url('../photos/team.webp'); }
  .hero-venue { background-image: url('../photos/venue.webp'); }
  .hero-terms { background-image: url('../photos/terms-and-conditions.webp'); }
  .hero-education { background-image: url('../photos/education.webp'); }
  .hero-faq { background-image: url('../photos/faq.webp'); }
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
  font-weight: 700;
}

.hero p {
  font-size: 1.25rem;
  margin-bottom: 1.5rem;
}

/* Main Content */
main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 3rem 20px;
}

.content-section {
  margin-bottom: 3rem;
}

h2 {
  color: var(--primary-color);
  font-size: 2rem;
  margin-bottom: 1.5rem;
  border-bottom: 3px solid var(--accent-color);
  padding-bottom: 0.5rem;
}

h3 {
  color: var(--secondary-color);
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

p {
  margin-bottom: 1rem;
  line-height: 1.8;
}

ul {
  margin-left: 2rem;
  margin-bottom: 1rem;
}

ul li {
  margin-bottom: 0.5rem;
}

/* Team Cards */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.team-card {
  background: var(--light-gray);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  transition: transform 0.3s, box-shadow 0.3s;
}

.team-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.15);
}

.team-card img {
  width: 100%;
  height: 500px;
  object-fit: cover;
}

.team-info {
  padding: 1.5rem;
}

.team-info h3 {
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

.team-info p {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--text-light);
}

/* Course List */
.course-list {
  display: grid;
  gap: 1.5rem;
  margin-top: 2rem;
}

.course-item {
  background: var(--light-gray);
  padding: 2rem;
  border-radius: 8px;
  border-left: 4px solid var(--secondary-color);
  transition: all 0.3s;
}

.course-item:hover {
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  transform: translateX(5px);
}

.course-item h3 {
  margin-bottom: 1rem;
}

.course-item a {
  color: var(--secondary-color);
  text-decoration: none;
  font-weight: 500;
}

.course-item a:hover {
  text-decoration: underline;
}

/* FAQ */
.faq-item {
  background: var(--light-gray);
  padding: 1.5rem 2rem;
  border-radius: 8px;
  border-left: 4px solid var(--secondary-color);
  margin-bottom: 1.5rem;
}

.faq-item h3 {
  color: var(--primary-color);
  margin-bottom: 0.75rem;
  font-size: 1.1rem;
}

.faq-item p {
  margin-bottom: 0.5rem;
}

.faq-item p:last-child {
  margin-bottom: 0;
}

/* Forms */
.form-container {
  max-width: 600px;
  margin: 2rem auto;
  background: var(--light-gray);
  padding: 2rem;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

label {
  font-weight: 500;
  color: var(--text-dark);
}

input[type="text"],
input[type="email"],
input[type="tel"],
textarea {
  padding: 0.75rem;
  border: 2px solid var(--border-gray);
  border-radius: 4px;
  font-size: 1rem;
  font-family: inherit;
  transition: border-color 0.3s;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="tel"]:focus,
textarea:focus {
  outline: none;
  border-color: var(--secondary-color);
}

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

.checkbox-group {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 1rem;
  background: #fff;
  border-radius: 4px;
}

.checkbox-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.checkbox-item input[type="checkbox"] {
  width: 20px;
  height: 20px;
  cursor: pointer;
}

.checkbox-item label {
  cursor: pointer;
  font-weight: normal;
}

.terms-checkbox {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem;
  background: #fff;
  border-radius: 4px;
}

.terms-checkbox input[type="checkbox"] {
  width: 20px;
  height: 20px;
  cursor: pointer;
}

.terms-checkbox label {
  font-weight: normal;
  cursor: pointer;
}

.terms-checkbox a {
  color: var(--secondary-color);
  text-decoration: none;
}

.terms-checkbox a:hover {
  text-decoration: underline;
}

button[type="submit"] {
  background-color: var(--secondary-color);
  color: #fff;
  padding: 1rem 2rem;
  border: none;
  border-radius: 4px;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.3s, transform 0.2s;
}

button[type="submit"]:hover {
  background-color: var(--primary-color);
  transform: translateY(-2px);
}

button[type="submit"]:disabled {
  background-color: var(--border-gray);
  cursor: not-allowed;
  transform: none;
}

/* Footer */
footer {
  background-color: var(--primary-color);
  color: #fff;
  padding: 2rem 20px;
  margin-top: 4rem;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
}

.footer-content p {
  margin-bottom: 0.5rem;
}

.footer-content a {
  color: #fff;
  text-decoration: none;
}

.footer-content a:hover {
  text-decoration: underline;
}

/* Responsive Design */
@media (max-width: 768px) {
  .menu-toggle {
    display: flex;
  }

  .nav-menu {
    display: none;
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background-color: #fff;
    flex-direction: column;
    gap: 0;
    padding: 1rem 0;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  }

  .nav-menu.active {
    display: flex;
  }

  .nav-menu li {
    padding: 0 1rem;
  }

  .nav-menu a {
    display: block;
    padding: 0.75rem 0;
  }

  .dropdown-content {
    position: static;
    box-shadow: none;
    margin-top: 0;
    padding-left: 1rem;
    background-color: var(--light-gray);
  }

  .dropdown:hover .dropdown-content {
    display: none;
  }

  .dropdown.active .dropdown-content {
    display: block;
  }

  .hero {
    height: 400px;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero p {
    font-size: 1rem;
  }

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

  .form-container {
    padding: 1.5rem;
  }
}

@media (max-width: 480px) {
  .hero {
    height: 300px;
  }

  .hero h1 {
    font-size: 1.5rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  nav {
    padding: 0 15px;
  }

  main {
    padding: 2rem 15px;
  }
}