/* =========================================================
   animations.css — Background animations, aurora, grid,
   micro-interactions, keyframes
   ========================================================= */

/* ─── PARTICLE CANVAS ────────────────────────────────────── */
#particle-canvas {
  position: fixed;
  top: 0; left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 1;
  transition: opacity 0.5s ease;
}

/* ─── AURORA BLOBS ────────────────────────────────────────── */
/*  Layered radial gradient orbs that drift continuously.     */
.aurora-wrap {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.aurora-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0;
  will-change: transform, opacity;
}

/* Dark mode aurora */
[data-theme="dark"] .aurora-blob { opacity: 0.55; }
[data-theme="light"] .aurora-blob { opacity: 0.22; }

.aurora-blob-1 {
  width: 700px; height: 700px;
  background: radial-gradient(circle, #4f46e5 0%, transparent 70%);
  top: -200px; left: -200px;
  animation: aurora-1 18s ease-in-out infinite alternate;
}

.aurora-blob-2 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, #7c3aed 0%, transparent 70%);
  top: 30%; right: -150px;
  animation: aurora-2 22s ease-in-out infinite alternate;
}

.aurora-blob-3 {
  width: 600px; height: 600px;
  background: radial-gradient(circle, #2563eb 0%, transparent 70%);
  bottom: -200px; left: 20%;
  animation: aurora-3 26s ease-in-out infinite alternate;
}

.aurora-blob-4 {
  width: 350px; height: 350px;
  background: radial-gradient(circle, #8b5cf6 0%, transparent 70%);
  top: 60%; left: 60%;
  animation: aurora-4 20s ease-in-out infinite alternate;
}

@keyframes aurora-1 {
  0%   { transform: translate(0, 0)    scale(1); }
  25%  { transform: translate(120px, 80px) scale(1.1); }
  50%  { transform: translate(60px, 150px) scale(0.95); }
  75%  { transform: translate(-60px, 100px) scale(1.05); }
  100% { transform: translate(40px, -80px) scale(1.12); }
}

@keyframes aurora-2 {
  0%   { transform: translate(0, 0)    scale(1); }
  33%  { transform: translate(-100px, 60px) scale(1.08); }
  66%  { transform: translate(-50px, -120px) scale(0.9); }
  100% { transform: translate(80px, -60px) scale(1.15); }
}

@keyframes aurora-3 {
  0%   { transform: translate(0, 0)    scale(1); }
  40%  { transform: translate(80px, -100px) scale(1.1); }
  80%  { transform: translate(-80px, -50px) scale(0.92); }
  100% { transform: translate(40px, 60px) scale(1.05); }
}

@keyframes aurora-4 {
  0%   { transform: translate(0, 0)    scale(1); }
  50%  { transform: translate(-120px, -80px) scale(1.2); }
  100% { transform: translate(60px, 100px) scale(0.85); }
}

/* ─── ANIMATED DOT GRID ───────────────────────────────────── */
/*  A subtle grid of dots that appears on hero section.        */
.dot-grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    radial-gradient(circle, rgba(99,102,241,0.2) 1px, transparent 1px);
  background-size: 32px 32px;
  -webkit-mask-image: radial-gradient(ellipse 80% 80% at 50% 50%,
              transparent 30%, black 100%);
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%,
              transparent 30%, black 100%);
  animation: dot-grid-fade 4s ease-out forwards;
}

[data-theme="light"] .dot-grid {
  background-image:
    radial-gradient(circle, rgba(99,102,241,0.15) 1px, transparent 1px);
}

@keyframes dot-grid-fade {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* ─── ANIMATED GRADIENT LINE ──────────────────────────────── */
/*  Horizontal shimmer lines that sweep across sections.       */
.shimmer-line {
  position: absolute;
  left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg,
    transparent 0%,
    var(--accent) 40%,
    var(--accent-light) 50%,
    var(--accent) 60%,
    transparent 100%);
  background-size: 200% auto;
  animation: shimmer-sweep 4s linear infinite;
  opacity: 0.4;
}

.shimmer-line.top    { top: 0; }
.shimmer-line.bottom { bottom: 0; }

@keyframes shimmer-sweep {
  0%   { background-position: -200% center; }
  100% { background-position: 200% center; }
}

/* ─── NOISE OVERLAY ───────────────────────────────────────── */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  opacity: 0.03;
  pointer-events: none;
  z-index: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 512 512' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 256px 256px;
}

/* ─── GLOWING NAV BORDER ──────────────────────────────────── */
#navbar::after {
  content: '';
  position: absolute;
  bottom: -1px; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg,
    transparent 0%,
    rgba(99,102,241,0.4) 30%,
    rgba(129,140,248,0.6) 50%,
    rgba(99,102,241,0.4) 70%,
    transparent 100%);
  background-size: 200% auto;
  animation: nav-glow 6s linear infinite;
  opacity: 0;
  transition: opacity 0.4s;
}

#navbar.scrolled::after { opacity: 1; }

@keyframes nav-glow {
  0%   { background-position: -200% center; }
  100% { background-position: 200% center; }
}

/* ─── HERO TEXT GRADIENT ANIMATION ───────────────────────── */
.hero-name .accent {
  background: linear-gradient(135deg, #6366f1 0%, #818cf8 40%, #a5b4fc 70%, #6366f1 100%);
  background-size: 200% auto;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: text-shimmer 5s linear infinite;
}

@keyframes text-shimmer {
  0%   { background-position: 0% center; }
  100% { background-position: 200% center; }
}

/* ─── SECTION DIVIDER GLOW ────────────────────────────────── */
.section-divider {
  height: 1px;
  background: linear-gradient(90deg,
    transparent, var(--border), transparent);
  position: relative;
  overflow: visible;
}

.section-divider::before {
  content: '';
  position: absolute;
  left: 50%; top: 50%;
  transform: translate(-50%, -50%);
  width: 60px; height: 60px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(99,102,241,0.3) 0%, transparent 70%);
  pointer-events: none;
}

/* ─── CARD SHINE EFFECT ───────────────────────────────────── */
/*  On hover, a moving shine slides across cards.              */
.skill-card,
.project-card,
.tl-card,
.ahi {
  isolation: isolate;
}

.skill-card::after,
.project-card .card-shine,
.tl-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    115deg,
    transparent 20%,
    rgba(255,255,255,0.04) 50%,
    transparent 80%
  );
  background-size: 200% 100%;
  background-position: -100% 0;
  transition: background-position 0.6s var(--ease);
  border-radius: inherit;
  pointer-events: none;
  z-index: 0;
}

.skill-card:hover::after,
.tl-card:hover::after {
  background-position: 200% 0;
}

/* ─── SPINNING GRADIENT BORDER ────────────────────────────── */
/*  Applied to avatar for a premium spinning border effect.    */
.avatar-glow-ring {
  position: absolute;
  inset: -2px;
  border-radius: 34px;
  background: conic-gradient(
    from 0deg,
    transparent 0%,
    var(--accent) 25%,
    var(--accent-light) 50%,
    var(--accent) 75%,
    transparent 100%
  );
  animation: conic-spin 4s linear infinite;
  z-index: -1;
}

.avatar-glow-ring::before {
  content: '';
  position: absolute;
  inset: 2px;
  background: var(--bg-card);
  border-radius: 32px;
}

@keyframes conic-spin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

/* ─── FLOATING PARTICLES (CSS fallback) ───────────────────── */
.float-orb {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  animation: float-orb linear infinite;
}

@keyframes float-orb {
  0%   { transform: translateY(100vh) rotate(0deg);  opacity: 0; }
  10%  { opacity: 0.6; }
  90%  { opacity: 0.6; }
  100% { transform: translateY(-20px) rotate(720deg); opacity: 0; }
}

/* ─── PAGE LOAD ANIMATION ─────────────────────────────────── */
@keyframes fade-in-up {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

.hero-badge  { animation: fade-in-up 0.7s var(--ease) 0.2s both; }
.hero-name   { animation: fade-in-up 0.8s var(--ease) 0.35s both; }
.hero-tagline{ animation: fade-in-up 0.8s var(--ease) 0.5s both; }
.hero-intro  { animation: fade-in-up 0.8s var(--ease) 0.65s both; }
.hero-btns   { animation: fade-in-up 0.8s var(--ease) 0.8s both; }
.hero-avatar-wrap { animation: fade-in-up 1s var(--ease) 0.5s both; }

/* ─── PROGRESS BARS (skill fill animation) ────────────────── */
@keyframes bar-fill {
  from { width: 0%; }
}

/* ─── CURSOR TRAIL ────────────────────────────────────────── */
.cursor-trail {
  position: fixed;
  width: 4px; height: 4px;
  border-radius: 50%;
  background: var(--accent);
  pointer-events: none;
  z-index: 9998;
  transform: translate(-50%, -50%);
  opacity: 0.6;
  animation: trail-fade 0.6s ease-out forwards;
}

@keyframes trail-fade {
  0%   { opacity: 0.6; transform: translate(-50%, -50%) scale(1); }
  100% { opacity: 0;   transform: translate(-50%, -50%) scale(0); }
}

/* ─── REDUCED MOTION SUPPORT ──────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  .aurora-blob,
  .avatar-glow-ring,
  .avatar-ring,
  .avatar-ring2,
  .hero-badge,
  .hero-name,
  .hero-tagline,
  .hero-intro,
  .hero-btns,
  .hero-avatar-wrap,
  .hero-stat {
    animation: none !important;
    opacity: 1 !important;
    transform: none !important;
  }

  .reveal {
    opacity: 1 !important;
    transform: none !important;
  }

  #particle-canvas { display: none; }
}