/* ─── Base ─── */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body { margin: 0; overflow-x: hidden; }

/* ─── Scrollbar ─── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: #f1f5f9; }
::-webkit-scrollbar-thumb { background: #94a3b8; border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #64748b; }

/* ─── Animations ─── */
@keyframes scrollLine {
  0% { top: -16px; opacity: 0; }
  20% { opacity: 1; }
  80% { opacity: 1; }
  100% { top: 40px; opacity: 0; }
}
.scroll-line { animation: scrollLine 1.6s ease-in-out infinite; }

/* ─── Hero Animations ─── */
.hero-anim {
  opacity: 0;
  transform: translateY(30px);
  animation: fadeUp 0.8s ease forwards;
}
.hero-anim:nth-child(1) { animation-delay: 0.2s; }
.hero-anim:nth-child(2) { animation-delay: 0.4s; }
.hero-anim:nth-child(3) { animation-delay: 0.6s; }
.hero-anim:nth-child(4) { animation-delay: 0.8s; }

@keyframes fadeUp {
  to { opacity: 1; transform: translateY(0); }
}

/* ─── Scroll Reveal ─── */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ─── Section Labels ─── */
.section-label {
  letter-spacing: 0.2em;
}

/* ─── Header ─── */
#header {
  backdrop-filter: blur(0px);
  transition: background-color 0.4s ease, backdrop-filter 0.4s ease, box-shadow 0.4s ease;
}
#header.scrolled {
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.06);
}
#header.scrolled .header-logo-text { color: #0f172a; }
#header.scrolled .menu-line { background: #1e293b; }

/* ─── Mobile Menu ─── */
#mobile-menu.open { opacity: 1; pointer-events: all; }
#mobile-menu.closed { opacity: 0; pointer-events: none; }
.mobile-link {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.3s ease, transform 0.3s ease;
}
#mobile-menu.open .mobile-link {
  opacity: 1;
  transform: translateY(0);
}
#mobile-menu.open .mobile-link:nth-child(1) { transition-delay: 0.05s; }
#mobile-menu.open .mobile-link:nth-child(2) { transition-delay: 0.1s; }
#mobile-menu.open .mobile-link:nth-child(3) { transition-delay: 0.15s; }
#mobile-menu.open .mobile-link:nth-child(4) { transition-delay: 0.2s; }

/* ─── Hamburger ─── */
.menu-open .menu-line:nth-child(1) { transform: rotate(45deg) translate(3px, 3px); }
.menu-open .menu-line:nth-child(2) { opacity: 0; }
.menu-open .menu-line:nth-child(3) { transform: rotate(-45deg) translate(3px, -3px); width: 20px; }

/* ─── Product Cards ─── */
.group:hover .rounded-xl svg { transform: scale(1.1); }
.group:hover .rounded-xl { background-color: #0d9488; }
.group:hover .rounded-xl svg path,
.group:hover .rounded-xl svg circle,
.group:hover .rounded-xl svg polyline,
.group:hover .rounded-xl svg line { stroke: white; }

/* ─── Input Focus ─── */
input:focus, textarea:focus {
  outline: none;
}

/* ─── Link Hover Underline ─── */
a { text-decoration: none; }

/* ─── Responsive ─── */
@media (max-width: 767px) {
  .hero-anim { animation-duration: 0.6s; }
}