/* ─── Custom Properties ─── */
:root {
  --teal-50: #f0fdfa;
  --teal-100: #ccfbf1;
  --teal-200: #99f6e4;
  --teal-300: #5eead4;
  --teal-400: #2dd4bf;
  --teal-500: #14b8a6;
  --teal-600: #0d9488;
  --teal-700: #0f766e;
  --teal-800: #115e59;
  --teal-900: #134e4a;
  --stone-50: #fafaf9;
  --stone-100: #f5f5f4;
  --stone-200: #e7e5e4;
  --stone-300: #d6d3d1;
  --stone-400: #a8a29e;
  --stone-500: #78716c;
  --stone-600: #57534e;
  --stone-700: #44403c;
  --stone-800: #292524;
  --stone-900: #1c1917;
  --font-serif: 'Playfair Display', Georgia, serif;
  --font-sans: 'Inter', system-ui, sans-serif;
}

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

body {
  font-family: var(--font-sans);
  background: var(--stone-50);
  color: var(--stone-800);
}

.font-playfair {
  font-family: var(--font-serif);
}

/* ─── Nav ─── */
#nav {
  background: rgba(250, 250, 249, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.4s, box-shadow 0.4s;
}

#nav.scrolled {
  border-bottom-color: var(--stone-200);
  box-shadow: 0 1px 20px rgba(0, 0, 0, 0.06);
}

.nav-link {
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1.5px;
  background: var(--teal-700);
  transition: width 0.3s ease;
}

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

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

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

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

#mobile-menu.open .line:nth-child(3) {
  transform: rotate(-45deg) translate(4px, -4px);
  width: 1.25rem;
}

/* ─── Reveal animations ─── */
.reveal-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}

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

.reveal-scale {
  opacity: 0;
  transform: scale(0.95);
  transition: opacity 0.8s cubic-bezier(0.22, 1, 0.36, 1), transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
}

.reveal-scale.visible {
  opacity: 1;
  transform: scale(1);
}

/* ─── Marquee ─── */
@keyframes marquee {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

.animate-marquee {
  animation: marquee 30s linear infinite;
}

/* ─── Scrollbar ─── */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--stone-100);
}

::-webkit-scrollbar-thumb {
  background: var(--stone-300);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--teal-600);
}

/* ─── Selection ─── */
::selection {
  background: var(--teal-200);
  color: var(--teal-900);
}

/* ─── Focus ─── */
:focus-visible {
  outline: 2px solid var(--teal-600);
  outline-offset: 2px;
}

/* ─── Responsive ─── */
@media (max-width: 768px) {
  .font-playfair {
    font-size: clamp(1.5rem, 5vw, 2.25rem);
  }
}