/* CSS Variables */
:root {
  --primary: #FF6B35;
  --secondary: #004E89;
  --accent: #1FA0A0;
  --dark: #1a1a1a;
  --light: #f5f5f5;
  --gray: #666;
  --gray-light: #ccc;
  --white: #ffffff;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 3rem;
  --spacing-xl: 4rem;
  --radius: 8px;
  --transition: all 0.3s ease;
}

/* Reset & Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 1rem;
}

h1 {
  font-size: 2.5rem;
  color: var(--dark);
}

h2 {
  font-size: 2rem;
  color: var(--dark);
}

h3 {
  font-size: 1.5rem;
  color: var(--dark);
}

p {
  margin-bottom: 1rem;
  color: var(--gray);
  font-size: 1rem;
}

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

a:hover {
  opacity: 0.8;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* Grid */
.grid {
  display: grid;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

@media (max-width: 768px) {

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  font-size: 1rem;
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  box-shadow: 0 4px 15px rgba(255, 107, 53, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255, 107, 53, 0.4);
}

.btn-secondary {
  background: var(--accent);
  color: white;
  box-shadow: 0 4px 15px rgba(31, 160, 160, 0.3);
}

.btn-secondary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(31, 160, 160, 0.4);
}

/* Navigation */
.nav {
  background: white;
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

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

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

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

.nav-link {
  color: var(--dark);
  font-weight: 500;
  position: relative;
  transition: var(--transition);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: var(--transition);
}

.nav-link:hover::after {
  width: 100%;
}

.menu-toggle {
  display: none;
  flex-direction: column;
  cursor: pointer;
}

.menu-toggle span {
  width: 25px;
  height: 3px;
  background: var(--dark);
  margin: 5px 0;
  transition: var(--transition);
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: white;
    padding: 1rem;
    gap: 0;
  }

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

  .menu-toggle {
    display: flex;
  }
}

/* Hero Section */
.hero {
  position: relative;
  height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: white;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: -1;
}

.hero::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.4);
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  padding: 0 var(--spacing-md);
}

.hero h1 {
  color: white;
  font-size: 3rem;
  margin-bottom: 1.5rem;
  line-height: 1.2;
}

.hero p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.1rem;
  margin-bottom: 2rem;
}

@media (max-width: 768px) {
  .hero {
    height: 400px;
  }

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

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

/* Cards */
.card {
  background: white;
  border-radius: var(--radius);
  padding: var(--spacing-md);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
  transition: var(--transition);
}

.card:hover {
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
  transform: translateY(-5px);
}

.card-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.card h3 {
  margin-top: 0;
}

/* Villa Cards */
.villa-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.2) !important;
}

.villa-card:hover img {
  transform: scale(1.08);
}

.villa-card:hover .villa-overlay {
  opacity: 1 !important;
}

.villa-card:hover h3 {
  color: var(--primary);
}

.card img {
  width: 100%;
  height: auto;
}

/* Sections */
section {
  padding: var(--spacing-lg) 0;
}

.bg-light {
  background-color: #f9f9f9;
}

.bg-dark {
  background-color: var(--dark);
  color: white;
}

.bg-dark a {
  color: var(--primary);
}

/* Text utilities */
.text-center {
  text-align: center;
}

.text-primary {
  color: var(--primary);
}

.text-secondary {
  color: var(--secondary);
}

.mb-2 {
  margin-bottom: var(--spacing-md);
}

.mt-2 {
  margin-top: var(--spacing-md);
}

/* Gallery */
.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.gallery-item {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  height: 250px;
  cursor: pointer;
}

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

.gallery-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
  color: white;
  padding: 2rem 1rem 1rem;
  transform: translateY(100%);
  transition: var(--transition);
}

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

.gallery-item:hover .gallery-overlay {
  transform: translateY(0);
}

.gallery-overlay p {
  color: white;
  margin: 0;
  font-weight: 600;
}

/* Pricing Cards */
.pricing-card {
  background: white;
  border-radius: var(--radius);
  padding: var(--spacing-md);
  text-align: center;
  border: 2px solid #e0e0e0;
  transition: var(--transition);
}

.pricing-card.featured {
  border-color: var(--primary);
  box-shadow: 0 10px 30px rgba(255, 107, 53, 0.2);
  transform: scale(1.05);
}

.pricing-card h3 {
  margin-top: 0;
  font-size: 1.5rem;
}

.price {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary);
  margin: 1rem 0;
}

.price-unit {
  font-size: 0.9rem;
  color: var(--gray);
}

.pricing-card ul {
  text-align: left;
  margin: 1.5rem 0;
}

.pricing-card li {
  padding: 0.5rem 0;
}

/* Testimonials */
.testimonial {
  background: white;
  border-radius: var(--radius);
  padding: var(--spacing-md);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
  border-left: 4px solid var(--primary);
}

.testimonial-stars {
  font-size: 1rem;
  margin-bottom: 1rem;
}

.testimonial p {
  font-style: italic;
  margin-bottom: 1.5rem;
  color: var(--gray);
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.testimonial-author strong {
  color: var(--dark);
}

/* FAQ */
.faq-item {
  border-bottom: 1px solid #e0e0e0;
  padding: 1.5rem 0;
  cursor: pointer;
}

.faq-item:last-child {
  border-bottom: none;
}

.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
  color: var(--dark);
  user-select: none;
}

.faq-question:hover {
  color: var(--primary);
}

.faq-answer {
  display: none;
  margin-top: 1rem;
  color: var(--gray);
  line-height: 1.8;
}

.faq-item.active .faq-answer {
  display: block;
}

.faq-item.active .faq-question span:last-child {
  transform: rotate(45deg);
}

/* Footer */
footer {
  background: var(--dark);
  color: var(--gray-light);
  padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.footer-section h3 {
  color: white;
  margin-bottom: 1rem;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.5rem;
}

.footer-links a {
  color: var(--gray-light);
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--primary);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-md);
  border-top: 1px solid #444;
  color: var(--gray);
}

/* Floating CTA */
.float-cta {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  z-index: 999;
}

.float-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  color: white;
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
  font-size: 1rem;
}

.btn-call {
  background: linear-gradient(135deg, #FF6B35, #FF8C42);
}

.btn-call:hover {
  transform: scale(1.15);
  box-shadow: 0 6px 20px rgba(255, 107, 53, 0.4);
}

.btn-zalo {
  background: linear-gradient(135deg, #0084FF, #0063F7);
}

.btn-zalo:hover {
  transform: scale(1.15);
  box-shadow: 0 6px 20px rgba(0, 132, 255, 0.4);
}

@media (max-width: 768px) {
  .float-cta {
    bottom: 1rem;
    right: 1rem;
  }

  .float-btn {
    width: 50px;
    height: 50px;
    font-size: 0.8rem;
  }
}

/* Responsive */
@media (max-width: 768px) {
  .container {
    padding: 0 var(--spacing-sm);
  }

  h1 {
    font-size: 1.75rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  section {
    padding: var(--spacing-md) 0;
  }

  .pricing-card.featured {
    transform: scale(1);
  }
}

/* Loading animation */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeIn 0.5s ease-out;
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}