/* ── Base ── */
*, *::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; }

/* ── Navbar ── */
#nav {
  background: rgba(253, 251, 248, 0);
  backdrop-filter: blur(0px);
  transition: background 0.5s ease, backdrop-filter 0.5s ease, box-shadow 0.5s ease;
}
#nav.scrolled {
  background: rgba(253, 251, 248, 0.92);
  backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 rgba(180, 160, 140, 0.15);
}

/* ── Mobile menu ── */
#mobileMenu.open { opacity: 1; pointer-events: all; }
#mobileMenu.closed { opacity: 0; pointer-events: none; }
.mobile-link { transition: opacity 0.4s ease, transform 0.4s ease; opacity: 0; transform: translateY(12px); }
#mobileMenu.open .mobile-link { opacity: 1; transform: translateY(0); }
#mobileMenu.open .mobile-link:nth-child(1) { transition-delay: 0.08s; }
#mobileMenu.open .mobile-link:nth-child(2) { transition-delay: 0.14s; }
#mobileMenu.open .mobile-link:nth-child(3) { transition-delay: 0.20s; }
#mobileMenu.open .mobile-link:nth-child(4) { transition-delay: 0.26s; }

/* ── Hamburger ── */
.menu-line { transition: transform 0.35s ease, opacity 0.25s ease; }
body.menu-open .menu-line:nth-child(1) { transform: translateY(6px) rotate(45deg); }
body.menu-open .menu-line:nth-child(2) { opacity: 0; }
body.menu-open .menu-line:nth-child(3) { transform: translateY(-6px) rotate(-45deg); width: 5; }

/* ── Floating cards ── */
@keyframes floatA {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-10px) rotate(0.5deg); }
}
@keyframes floatB {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-8px) rotate(-0.5deg); }
}
@keyframes floatC {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-6px) scale(1.02); }
}
.card-float { animation: floatA 4s ease-in-out infinite; }
.card-float:nth-child(2) { animation-name: floatB; animation-duration: 5s; }
.card-float:nth-child(3) { animation-name: floatC; animation-duration: 4.5s; }

/* ── Scroll reveal ── */
.reveal {
  opacity: 1;
  transform: none;
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.js .reveal {
  opacity: 0;
  transform: translateY(28px);
}
@media (prefers-reduced-motion: no-preference) {
  .js .reveal.visible {
    opacity: 1;
    transform: translateY(0);
  }
}
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none !important; transition: none; }
}

/* ── Selection ── */
::selection { background: rgba(192, 96, 58, 0.15); }

/* ── Focus ── */
:focus-visible { outline: 2px solid #C0603A; outline-offset: 2px; }

/* ── Smooth image loading ── */
img { display: block; max-width: 100%; }

/* ── Subtle grain overlay (optional feel) ── */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.018;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  background-size: 128px 128px;
  z-index: 9999;
}