/* =====================================================================
   THEME SHARED — Keeky Hub
   Aurora animé (GPU-friendly, CSS pur), glassmorphism, néon cyan.
   Inclure via <link rel="stylesheet" href="assets/theme.css">
   Placé APRÈS security-head.js (pour respecter la CSP).
   ===================================================================== */

:root {
  --c-cyan: #00ffcc;
  --c-cyan-soft: rgba(0, 255, 204, 0.4);
  --c-cyan-dim: rgba(0, 255, 204, 0.15);
  --c-bg-0: #0f2027;
  --c-bg-1: #203a43;
  --c-bg-2: #2c5364;
  --c-bg-deep: #050e12;

  --glass-bg: rgba(15, 32, 39, 0.55);
  --glass-border: rgba(0, 255, 204, 0.25);
  --glass-shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
  --glass-blur: 18px;

  --radius-lg: 20px;
  --radius-md: 12px;
  --radius-sm: 8px;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-bounce: cubic-bezier(0.2, 0.8, 0.2, 1.2);
}

/* --- AURORA ANIMÉ (fond global) --- */
/* Fond foncé sur html par défaut pour éviter le fond blanc si l'aurora
   ne se rend pas / avant le chargement. */
html {
  background-color: var(--c-bg-deep);
}

.aurora-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  background: var(--c-bg-deep);
  pointer-events: none;
}

.aurora-bg::before,
.aurora-bg::after {
  content: '';
  position: absolute;
  inset: -50%;
  will-change: transform;
  background:
    radial-gradient(40% 50% at 20% 30%, rgba(0, 255, 204, 0.18), transparent 60%),
    radial-gradient(45% 55% at 80% 70%, rgba(44, 83, 100, 0.45), transparent 60%),
    radial-gradient(35% 45% at 50% 50%, rgba(0, 255, 204, 0.10), transparent 70%),
    radial-gradient(50% 50% at 70% 20%, rgba(32, 58, 67, 0.5), transparent 65%);
  animation: aurora-drift 24s var(--ease-out) infinite alternate;
}

.aurora-bg::after {
  inset: -60%;
  background:
    radial-gradient(50% 50% at 30% 80%, rgba(0, 255, 204, 0.14), transparent 60%),
    radial-gradient(40% 40% at 70% 30%, rgba(44, 83, 100, 0.35), transparent 65%);
  animation: aurora-drift2 30s var(--ease-out) infinite alternate-reverse;
  opacity: 0.7;
}

@keyframes aurora-drift {
  0%   { transform: translate3d(-6%, -3%, 0) rotate(0deg) scale(1.2); }
  100% { transform: translate3d(8%, 6%, 0) rotate(18deg) scale(1.4); }
}
@keyframes aurora-drift2 {
  0%   { transform: translate3d(5%, 4%, 0) rotate(0deg) scale(1.3); }
  100% { transform: translate3d(-7%, -5%, 0) rotate(-22deg) scale(1.55); }
}

/* Grain léger par-dessus pour casser le aplat */
.aurora-bg .grain {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(rgba(255,255,255,0.015) 1px, transparent 1px);
  background-size: 3px 3px;
  mix-blend-mode: overlay;
}

/* --- GLASSMORPHISM --- */
.glass {
  background: var(--glass-bg);
  -webkit-backdrop-filter: blur(var(--glass-blur));
  backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  border-radius: var(--radius-lg);
}

/* --- BOUTONS NEONS --- */
.btn-neon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 22px;
  border-radius: var(--radius-md);
  background: rgba(0, 255, 204, 0.06);
  border: 1px solid rgba(0, 255, 204, 0.35);
  color: var(--c-cyan);
  font-family: inherit;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.25s var(--ease-bounce), box-shadow 0.25s var(--ease-out),
              background 0.25s, border-color 0.25s;
  position: relative;
  overflow: hidden;
}
.btn-neon:hover {
  background: var(--c-cyan);
  color: var(--c-bg-0);
  border-color: var(--c-cyan);
  box-shadow: 0 0 28px rgba(0, 255, 204, 0.45), 0 8px 24px rgba(0, 255, 204, 0.25);
  transform: translateY(-2px);
}
.btn-neon:active { transform: translateY(0) scale(0.98); }
.btn-neon.danger { background: rgba(255, 71, 87, 0.08); border-color: rgba(255, 71, 87, 0.4); color: #ff6b78; }
.btn-neon.danger:hover { background: #ff4757; color: #fff; border-color: #ff4757; box-shadow: 0 0 24px rgba(255,71,87,0.5); }

/* --- HEADER COMMUN (nav retour) --- */
.site-header {
  position: fixed;
  top: 18px;
  left: 18px;
  z-index: 1000;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 18px;
  border-radius: 30px;
  background: var(--glass-bg);
  -webkit-backdrop-filter: blur(var(--glass-blur));
  backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  color: var(--c-cyan);
  font-family: 'Poppins', system-ui, sans-serif;
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  transition: all 0.25s var(--ease-out);
}
.site-header:hover {
  background: var(--c-cyan);
  color: var(--c-bg-0);
  box-shadow: 0 0 22px var(--c-cyan-dim);
  transform: translateX(3px);
}

/* --- ANIMATIONS UTILITAIRES --- */
@keyframes fade-up {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fade-in { from { opacity: 0; } to { opacity: 1; } }
@keyframes float-soft {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-8px); }
}
@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 0 0 var(--c-cyan-dim); }
  50%      { box-shadow: 0 0 0 12px transparent; }
}
@keyframes shimmer {
  0%   { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

.reveal { animation: fade-up 0.8s var(--ease-out) both; }
.float-soft { animation: float-soft 3.5s ease-in-out infinite; }

/* --- SCROLLBAR STYLÉE --- */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: rgba(0,0,0,0.3); }
::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, #2c5364, var(--c-cyan));
  border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover { background: var(--c-cyan); }

/* --- REDUCED MOTION --- */
@media (prefers-reduced-motion: reduce) {
  .aurora-bg::before, .aurora-bg::after { animation: none; }
  .float-soft, .reveal { animation: none; }
}