frontend/src/styles/index.css

@tailwind base;
@tailwind components;
@tailwind utilities;

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background: #0F172A;
  color: #F8FAFC;
  /* GPU acceleration for smooth scrolling */
  -webkit-overflow-scrolling: touch;
}

/* ─── Performance: GPU-accelerated transforms ───────────────────────────── */
.glass,
.card,
[class*="animate-"] {
  will-change: transform, opacity;
  transform: translateZ(0);
  backface-visibility: hidden;
}

/* ─── MapLibre popup overrides — dark premium theme ──────────────────────── */
.maplibregl-popup-content {
  padding: 0 !important;
  border-radius: 16px !important;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(51, 65, 85, 0.4) !important;
  overflow: hidden;
  max-width: 360px !important;
  background: #1E293B !important;
  border: 1px solid #334155 !important;
}

.maplibregl-popup-close-button {
  font-size: 18px;
  padding: 4px 8px;
  color: #94A3B8;
  z-index: 10;
  right: 4px !important;
  top: 4px !important;
  transition: all 0.15s ease;
}

.maplibregl-popup-close-button:hover {
  color: #F8FAFC;
  background: #334155;
  border-radius: 6px;
}

.maplibregl-popup-tip { display: none; }

.maplibregl-ctrl-group {
  background: #1E293B !important;
  border: 1px solid #334155 !important;
  border-radius: 12px !important;
  overflow: hidden;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3) !important;
}

.maplibregl-ctrl-group button {
  background: #1E293B !important;
  border-color: #334155 !important;
  transition: background 0.15s ease;
}

.maplibregl-ctrl-group button:hover {
  background: #334155 !important;
}

.maplibregl-ctrl-group button .maplibregl-ctrl-icon {
  filter: invert(1);
}

/* ─── Custom scrollbar — thin & subtle ───────────────────────────────────── */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #475569; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #64748B; }
.scrollbar-thin::-webkit-scrollbar { width: 3px; }

/* ─── Animations — 60fps GPU-accelerated ─────────────────────────────────── */
@keyframes slideInLeft {
  from { transform: translate3d(-100%, 0, 0); opacity: 0; }
  to { transform: translate3d(0, 0, 0); opacity: 1; }
}
@keyframes slideInRight {
  from { transform: translate3d(100%, 0, 0); opacity: 0; }
  to { transform: translate3d(0, 0, 0); opacity: 1; }
}
@keyframes fadeIn {
  from { opacity: 0; transform: translate3d(0, 8px, 0); }
  to { opacity: 1; transform: translate3d(0, 0, 0); }
}
@keyframes slideUp {
  from { transform: translate3d(0, 100%, 0); opacity: 0; }
  to { transform: translate3d(0, 0, 0); opacity: 1; }
}
@keyframes scaleIn {
  from { transform: scale(0.95); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}
@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

.animate-slide-in-left { animation: slideInLeft 0.25s cubic-bezier(0.16, 1, 0.3, 1); }
.animate-slide-in-right { animation: slideInRight 0.25s cubic-bezier(0.16, 1, 0.3, 1); }
.animate-fade-in { animation: fadeIn 0.2s ease-out; }
.animate-slide-up { animation: slideUp 0.3s cubic-bezier(0.16, 1, 0.3, 1); }
.animate-scale-in { animation: scaleIn 0.2s cubic-bezier(0.16, 1, 0.3, 1); }

/* ─── Glass panel — premium flat dark ────────────────────────────────────── */
.glass {
  background: rgba(30, 41, 59, 0.95);
  border: 1px solid rgba(51, 65, 85, 0.6);
  backdrop-filter: none; /* No blur = no lag */
}

/* ─── Interactive micro-effects ──────────────────────────────────────────── */
button {
  transition: transform 0.1s ease, background-color 0.15s ease, color 0.15s ease, box-shadow 0.15s ease;
}
button:active:not(:disabled) {
  transform: scale(0.97);
}

/* Hover lift for cards */
.card-hover {
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.2s ease;
}
.card-hover:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px -5px rgba(0, 0, 0, 0.3);
}

/* ─── Brand colors ───────────────────────────────────────────────────────── */
.gradient-text {
  color: #F97316;
}
.unicorn-badge {
  color: #F97316;
  font-weight: 700;
}

/* ─── Utility classes ────────────────────────────────────────────────────── */
.line-clamp-2 {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.line-clamp-3 {
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ─── Skeleton loading ───────────────────────────────────────────────────── */
.skeleton {
  background: linear-gradient(90deg, #1E293B 25%, #334155 50%, #1E293B 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: 8px;
}

/* ─── Focus ring for accessibility ───────────────────────────────────────── */
:focus-visible {
  outline: 2px solid #F97316;
  outline-offset: 2px;
  border-radius: 4px;
}

/* ─── Reduce motion for accessibility ────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}