/* ── Base & Utilities ── */
html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  overflow-x: hidden;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* ── Header ── */
#site-header {
  background: transparent;
  transition: background 0.4s ease, box-shadow 0.4s ease, backdrop-filter 0.4s ease;
}

#site-header.scrolled {
  background: rgba(254, 253, 248, 0.95);
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 20px rgba(6, 78, 59, 0.08);
}

.nav-link {
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: #10B981;
  transition: width 0.3s ease;
  border-radius: 1px;
}

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

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

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

.mobile-nav-link {
  position: relative;
}

.mobile-nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: #10B981;
  transition: width 0.3s ease;
}

.mobile-nav-link:hover::after {
  width: 3rem;
}

/* ── Hero ── */
#hero {
  position: relative;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-gradient {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(6, 78, 59, 0.85) 0%,
    rgba(4, 120, 87, 0.75) 40%,
    rgba(5, 150, 105, 0.65) 70%,
    rgba(16, 185, 129, 0.55) 100%
  );
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 30% 50%, transparent 0%, rgba(6, 78, 59, 0.3) 100%);
}

/* ── Cards ── */
.card {
  transition: transform 0.4s ease, box-shadow 0.4s ease;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 60px rgba(6, 78, 59, 0.12);
}

/* ── Scroll Reveal ── */
.reveal {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .card:hover { transform: none; }
  img { transition: none; }
  .animate-bounce { animation: none; }
}

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: #FDF9F0; }
::-webkit-scrollbar-thumb { background: #86EFAC; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #4ADE80; }

/* ── Focus visible ── */
:focus-visible {
  outline: 2px solid #10B981;
  outline-offset: 2px;
  border-radius: 4px;
}

/* ── Selection ── */
::selection {
  background: #86EFAC;
  color: #064E3B;
}