/* ========== BASE & ANIMATIONS ========== */
  *, *::before, *::after {
    box-sizing: border-box;
  }

  html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
  }

  body {
    overflow-x: hidden;
  }

  /* Fade-up animation for hero elements */
  @keyframes fade-up {
    from {
      opacity: 0;
      transform: translateY(30px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }

  .animate-fade-up {
    animation: fade-up 0.8s ease-out;
  }

  /* Scroll line animation */
  @keyframes scroll-line {
    0%, 100% {
      opacity: 0.3;
      transform: scaleY(0.5);
      transform-origin: top;
    }
    50% {
      opacity: 1;
      transform: scaleY(1);
    }
  }

  .animate-scroll-line {
    animation: scroll-line 2s ease-in-out infinite;
  }

  /* ========== NAVIGATION ========== */
  #site-header.scrolled #nav-bg {
    background: rgba(255, 255, 255, 0.92);
    backdrop-blur: 12px;
    box-shadow: 0 1px 0 rgba(15, 43, 60, 0.06);
  }

  #site-header.scrolled .nav-link {
    color: #14293c;
  }

  /* ========== MOBILE MENU ========== */
  #mobile-menu.open {
    transform: translateX(0);
  }

  #mobile-menu.closed {
    transform: translateX(100%);
  }

  /* Hamburger animation */
  #menu-btn.active #bar1 {
    transform: rotate(45deg) translate(5px, 5px);
  }

  #menu-btn.active #bar2 {
    opacity: 0;
  }

  #menu-btn.active #bar3 {
    transform: rotate(-45deg) translate(5px, -5px);
    width: 1.5rem;
  }

  .mobile-link {
    animation: fade-up 0.5s ease-out forwards;
    opacity: 0;
  }

  .mobile-link:nth-child(1) { animation-delay: 0.1s; }
  .mobile-link:nth-child(2) { animation-delay: 0.2s; }
  .mobile-link:nth-child(3) { animation-delay: 0.3s; }
  .mobile-link:nth-child(4) { animation-delay: 0.4s; }
  .mobile-link:nth-child(5) { animation-delay: 0.5s; }

  /* ========== ROOM CARDS ========== */
  .room-card {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
  }

  .room-card.visible {
    opacity: 1;
    transform: translateY(0);
  }

  .room-card:nth-child(1) { transition-delay: 0.1s; }
  .room-card:nth-child(2) { transition-delay: 0.2s; }
  .room-card:nth-child(3) { transition-delay: 0.3s; }

  /* ========== SCROLL REVEAL ========== */
  .reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
  }

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

  /* ========== FORM STYLES ========== */
  input:focus, textarea:focus {
    border-color: #89ddb8 !important;
    box-shadow: 0 0 0 4px rgba(168, 216, 200, 0.15) !important;
  }

  /* ========== CUSTOM SELECTION ========== */
  ::selection {
    background: #bcebd3;
    color: #0f2b3c;
  }

  /* ========== RESPONSIVE TWEAKS ========== */
  @media (max-width: 640px) {
    html {
      scroll-padding-top: 70px;
    }
  }