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

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

body {
  min-height: 100vh;
}

::selection {
  background: #C0603A;
  color: #fff;
}

/* ── Mobile Menu ── */
#mobileMenu {
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

#mobileMenu.open {
  opacity: 1;
  pointer-events: all;
}

.mobile-link {
  font-size: 1.1rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #78716c;
  transition: color 0.2s ease;
}

.mobile-link:hover {
  color: #C0603A;
}

/* ── Menu Button Animation ── */
#menuBtn {
  position: relative;
}

.menu-line {
  transition: transform 0.3s ease, opacity 0.3s ease;
}

#menuBtn.active .menu-line:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

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

#menuBtn.active .menu-line:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* ── Scroll Animations ── */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Service Cards ── */
.service-card {
  transition: background-color 0.3s ease;
}

/* ── Header Scroll State ── */
header.scrolled {
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.05);
}

/* ── Responsive adjustments ── */
@media (max-width: 640px) {
  .font-serif {
    font-size: 2rem;
  }
}