/* Base */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  overflow-x: hidden;
}

::selection {
  background: rgba(13, 148, 136, 0.15);
  color: #0f766e;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: #f1f5f9;
}
::-webkit-scrollbar-thumb {
  background: #94a3b8;
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: #64748b;
}

/* Header */
#header {
  color: #f8fafc;
}

#header.scrolled {
  background: rgba(15, 23, 42, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 rgba(255,255,255,0.06);
}

#header.light-header {
  color: #0f172a;
}

#header.light-header.scrolled {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 rgba(0,0,0,0.06);
}

.nav-link {
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: currentColor;
  transition: width 0.3s ease;
}

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

/* Mobile menu */
#mobile-menu.open {
  opacity: 1;
  pointer-events: all;
}

/* Hero animations */
.hero-subtitle {
  animation: fadeUp 0.8s ease forwards;
  animation-delay: 0.3s;
  opacity: 0;
}

.hero-title {
  animation: fadeUp 0.8s ease forwards;
  animation-delay: 0.5s;
  opacity: 0;
}

.hero-desc {
  animation: fadeUp 0.8s ease forwards;
  animation-delay: 0.7s;
  opacity: 0;
}

.hero-ctas {
  animation: fadeUp 0.8s ease forwards;
  animation-delay: 0.9s;
  opacity: 0;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Scroll reveal */
.reveal {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal[data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Apartment cards */
.apartment-card {
  transform: translateY(0);
  transition: transform 0.5s ease, box-shadow 0.5s ease;
}

.apartment-card:hover {
  transform: translateY(-4px);
}

/* Amenity cards */
.amenity-card {
  transform: translateY(0);
  transition: transform 0.4s ease, box-shadow 0.4s ease;
}

.amenity-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(13, 148, 136, 0.08);
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .hero-subtitle,
  .hero-title,
  .hero-desc,
  .hero-ctas {
    animation: none;
    opacity: 1;
  }

  .reveal[data-reveal] {
    opacity: 1;
    transform: none;
  }

  html {
    scroll-behavior: auto;
  }

  .apartment-card,
  .amenity-card {
    transition: none;
  }

  .apartment-card:hover,
  .amenity-card:hover {
    transform: none;
  }

  .apartment-card img,
  .amenity-card img {
    transition: none;
  }
}