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

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

  body {
    margin: 0;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
  }

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

  /* ── Scroll Reveal (progressive enhancement) ── */
  @media (prefers-reduced-motion: no-preference) {
    .reveal {
      opacity: 0;
      transform: translateY(24px);
      transition: opacity 0.6s ease, transform 0.6s ease;
    }

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

    .reveal:nth-child(2) { transition-delay: 0.1s; }
    .reveal:nth-child(3) { transition-delay: 0.2s; }
  }

  /* ── Navbar ── */
  #navbar {
    background: rgba(254, 253, 251, 0);
    backdrop-filter: blur(0px);
    transition: background 0.3s ease, backdrop-filter 0.3s ease, box-shadow 0.3s ease;
  }

  #navbar.scrolled {
    background: rgba(254, 253, 251, 0.95);
    backdrop-filter: blur(12px);
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.08);
  }

  /* ── Mobile Menu ── */
  .menu-line {
    display: block;
    width: 20px;
    height: 2px;
    background-color: #475569;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    transition: all 0.3s ease;
  }

  #menu-toggle[aria-expanded="true"] .menu-line:nth-child(1) {
    transform: translateX(-50%) rotate(45deg);
    top: 5px;
  }

  #menu-toggle[aria-expanded="true"] .menu-line:nth-child(2) {
    opacity: 0;
  }

  #menu-toggle[aria-expanded="true"] .menu-line:nth-child(3) {
    transform: translateX(-50%) rotate(-45deg);
    top: 5px;
  }

  /* ── Animations ── */
  @keyframes float {
    0%, 100% { transform: translateY(0) scale(1); }
    50% { transform: translateY(-20px) scale(1.05); }
  }

  @keyframes float-delay {
    0%, 100% { transform: translateY(0) scale(1); }
    50% { transform: translateY(-15px) scale(1.03); }
  }

  @keyframes scroll {
    0% { opacity: 1; transform: translateY(0); }
    100% { opacity: 0; transform: translateY(8px); }
  }

  .animate-float {
    animation: float 6s ease-in-out infinite;
  }

  .animate-float-delay {
    animation: float-delay 7s ease-in-out infinite;
    animation-delay: 1s;
  }

  .animate-scroll {
    animation: scroll 1.5s ease-in-out infinite;
  }

  /* ── Mobile menu transitions ── */
  #mobile-menu {
    animation: slideDown 0.3s ease;
  }

  @keyframes slideDown {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: translateY(0); }
  }

  /* ── Form focus styles ── */
  input:focus, select:focus, textarea:focus {
    outline: none;
  }

  /* ── Selection color ── */
  ::selection {
    background-color: #d05530;
    color: #fefdfb;
  }