/* ==========================================
   Artik Lab — Custom Styles
   Brand colors, animations, patterns
   ========================================== */

/* --- CSS Custom Properties --- */
:root {
  --navy: #0D435B;
  --teal: #0E88A5;
  --green: #47B488;
  --lime: #9BC979;
  --white: #FFFFFF;
}

/* --- Base --- */
html {
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

body {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* --- Hero Pattern --- */
.hero-pattern {
  background-image:
    radial-gradient(circle at 20% 50%, rgba(155, 201, 121, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(14, 136, 165, 0.12) 0%, transparent 40%),
    radial-gradient(circle at 60% 80%, rgba(71, 180, 136, 0.10) 0%, transparent 45%);
}

/* Star decoration overlay */
.hero-pattern::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M30 24l2 6h6l-5 4 2 6-5-4-5 4 2-6-5-4h6z' fill='%239BC979' fill-opacity='0.06'/%3E%3C/svg%3E");
  background-size: 60px 60px;
}

/* --- Header --- */
#site-header.scrolled {
  box-shadow: 0 1px 3px rgba(13, 67, 91, 0.08);
}

/* --- Mobile Menu --- */
.mobile-menu-overlay {
  position: fixed;
  inset: 0;
  background: #0D435B;
  z-index: 100;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.mobile-menu-overlay.open {
  opacity: 1;
}

.mobile-menu-overlay.hidden {
  display: none;
}

.mobile-nav-link {
  transform: translateY(10px);
  opacity: 0;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.mobile-menu-overlay.open .mobile-nav-link {
  transform: translateY(0);
  opacity: 1;
}

.mobile-menu-overlay.open .mobile-nav-link:nth-child(1) { transition-delay: 0.05s; }
.mobile-menu-overlay.open .mobile-nav-link:nth-child(2) { transition-delay: 0.1s; }
.mobile-menu-overlay.open .mobile-nav-link:nth-child(3) { transition-delay: 0.15s; }
.mobile-menu-overlay.open .mobile-nav-link:nth-child(4) { transition-delay: 0.2s; }
.mobile-menu-overlay.open .mobile-nav-link:nth-child(5) { transition-delay: 0.25s; }

/* --- Stat Cards --- */
.stat-card {
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(13, 67, 91, 0.08);
}

/* --- Pillar Cards --- */
.pillar-card {
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.pillar-card:hover {
  transform: translateY(-3px);
  border-color: rgba(71, 180, 136, 0.3);
}

/* --- Module Cards --- */
.module-card {
  cursor: default;
}

/* --- Scroll Animations --- */
.fade-up {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* Stagger children */
.stagger > .fade-up:nth-child(1) { transition-delay: 0s; }
.stagger > .fade-up:nth-child(2) { transition-delay: 0.1s; }
.stagger > .fade-up:nth-child(3) { transition-delay: 0.15s; }
.stagger > .fade-up:nth-child(4) { transition-delay: 0.2s; }

/* --- Footer Logo (invert for dark bg) --- */
.footer-logo {
  filter: brightness(0) invert(1);
  opacity: 0.7;
}

.footer-logo:hover {
  opacity: 1;
}

/* --- Focus States (Accessibility) --- */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: 2px;
  border-radius: 4px;
}

/* --- Selection --- */
::selection {
  background: rgba(155, 201, 121, 0.3);
  color: var(--navy);
}

/* --- Responsive Adjustments --- */
@media (max-width: 640px) {
  .hero-pattern::before {
    background-size: 40px 40px;
  }
}

/* --- Reduced Motion --- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .fade-up {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .mobile-nav-link {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .stat-card,
  .pillar-card {
    transition: none;
  }

  .animate-bounce {
    animation: none;
  }
}