/* ── Reset & 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;
}

img {
  display: block;
  max-width: 100%;
}

/* ── Navigation ── */
#nav {
  background: transparent;
  transition: background 0.4s ease, box-shadow 0.4s ease;
}

#nav.scrolled {
  background: rgba(7, 16, 32, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.05);
}

.nav-link {
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: #A7F3D0;
  transition: width 0.3s ease;
}

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

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

#mobile-menu.open .mobile-link {
  animation: slideUp 0.4s ease forwards;
  opacity: 0;
}

#mobile-menu.open .mobile-link:nth-child(1) { animation-delay: 0.05s; }
#mobile-menu.open .mobile-link:nth-child(2) { animation-delay: 0.1s; }
#mobile-menu.open .mobile-link:nth-child(3) { animation-delay: 0.15s; }
#mobile-menu.open .mobile-link:nth-child(4) { animation-delay: 0.2s; }
#mobile-menu.open .mobile-link:nth-child(5) { animation-delay: 0.25s; }

@keyframes slideUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

.menu-line {
  display: block;
}

#menu-btn.active .menu-line:nth-child(1) {
  transform: rotate(45deg) translate(4px, 4px);
}

#menu-btn.active .menu-line:nth-child(2) {
  opacity: 0;
}

#menu-btn.active .menu-line:nth-child(3) {
  transform: rotate(-45deg) translate(4px, -4px);
  width: 24px;
  margin-left: 0;
}

/* ── Hero Animations ── */
.hero-eyebrow {
  animation: fadeUp 0.8s ease 0.2s forwards;
  opacity: 0;
}

.hero-headline {
  animation: fadeUp 0.8s ease 0.4s forwards;
  opacity: 0;
}

.hero-sub {
  animation: fadeUp 0.8s ease 0.6s forwards;
  opacity: 0;
}

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

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

/* ── Scroll Reveal (below the fold only) ── */
.reveal-up,
.reveal-left,
.reveal-right {
  opacity: 1; /* visible by default for progressive enhancement */
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal-up {
  transform: translateY(32px);
}

.reveal-left {
  transform: translateX(-32px);
}

.reveal-right {
  transform: translateX(32px);
}

.revealed.reveal-up,
.revealed.reveal-left,
.revealed.reveal-right {
  transform: translate(0, 0);
  opacity: 1;
}

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .reveal-up,
  .reveal-left,
  .reveal-right {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .hero-eyebrow,
  .hero-headline,
  .hero-sub,
  .hero-ctas {
    opacity: 1;
    animation: none;
  }
  #mobile-menu.open .mobile-link {
    animation: none;
    opacity: 1;
  }
}

/* ── Room Cards ── */
.room-card {
  opacity: 1;
  transform: translateY(32px);
  transition: opacity 0.7s ease, transform 0.7s ease, border-color 0.4s ease, box-shadow 0.4s ease;
}

.room-card.revealed {
  transform: translateY(0);
}

.room-card:hover {
  box-shadow: 0 24px 64px -16px rgba(0, 0, 0, 0.4);
}

/* ── Amenity Cards ── */
.amenity-card {
  opacity: 1;
  transform: translateY(32px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.amenity-card.revealed {
  transform: translateY(0);
}

.amenity-card:hover {
  box-shadow: 0 16px 48px -16px rgba(0, 0, 0, 0.3);
}

/* ── Focus Styles ── */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid #A7F3D0;
  outline-offset: 2px;
  border-radius: 4px;
}

/* ── Selection ── */
::selection {
  background: rgba(167, 243, 208, 0.2);
  color: #A7F3D0;
}