/* ══════════════════════════════════════════════════════════════
   SARBORUP SARKAR PORTFOLIO — animations.css
   Keyframes & CSS transitions
══════════════════════════════════════════════════════════════ */

/* ── Page Loader ─────────────────────────────────────────────── */
.page-loader {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: var(--bg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 24px;
  transition: opacity 0.6s ease, visibility 0.6s ease;
}
.page-loader.done {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}
.loader-text {
  display: flex;
  align-items: baseline;
  gap: 12px;
}
.loader-name {
  font-family: var(--font-head);
  font-size: 3rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.04em;
}
.loader-percent {
  font-family: var(--font-mono);
  font-size: var(--size-sm);
  color: var(--text-sec);
}
.loader-line {
  width: 200px;
  height: 1px;
  background: var(--border);
  position: relative;
  overflow: hidden;
}
.loader-line::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  animation: loaderSweep 1.2s ease-in-out infinite;
}

/* ── Custom Cursor ───────────────────────────────────────────── */
.cursor-outer {
  position: fixed;
  width: 36px;
  height: 36px;
  border: 1.5px solid rgba(0, 163, 255, 0.6);
  border-radius: 50%;
  pointer-events: none;
  z-index: 9998;
  transform: translate(-50%, -50%);
  transition: width 0.3s ease, height 0.3s ease, border-color 0.3s ease, opacity 0.3s ease;
  will-change: transform;
  mix-blend-mode: normal;
}
.cursor-inner {
  position: fixed;
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  pointer-events: none;
  z-index: 9999;
  transform: translate(-50%, -50%);
  will-change: transform;
}
.cursor-outer.hover {
  width: 56px;
  height: 56px;
  border-color: var(--accent);
  background: var(--accent-glow2);
}
.cursor-outer.click {
  width: 28px;
  height: 28px;
  background: var(--accent-glow);
}

/* ── Keyframes ───────────────────────────────────────────────── */
@keyframes loaderSweep {
  0%   { left: -100%; }
  100% { left: 100%; }
}

@keyframes logoPulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.5; transform: scale(0.7); }
}

@keyframes statusPulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(0,255,135,0.4); }
  50%       { opacity: 0.8; box-shadow: 0 0 0 4px rgba(0,255,135,0); }
}

@keyframes scrollDot {
  0%   { top: -6px; opacity: 1; }
  80%  { top: 60px; opacity: 0; }
  81%  { top: -6px; opacity: 0; }
  100% { top: -6px; opacity: 1; }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes pulseGlow {
  0%, 100% { box-shadow: 0 0 12px var(--accent-glow); }
  50%       { box-shadow: 0 0 28px rgba(0,163,255,0.5), 0 0 60px rgba(0,163,255,0.2); }
}

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

@keyframes waveIn {
  0%   { transform: scaleX(0); opacity: 0; }
  100% { transform: scaleX(1); opacity: 1; }
}

@keyframes dotBounce {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-5px); }
}

@keyframes borderRotate {
  0%   { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* ── Word / Char Reveal (GSAP controlled via JS, CSS preps them) */
.word-wrap {
  display: inline-block;
  overflow: hidden;
  vertical-align: bottom;
}
.word {
  display: inline-block;
  transform: translateY(100%);
  opacity: 0;
}

/* ── Scroll Reveal Base ──────────────────────────────────────── */
.reveal-text {
  opacity: 0;
  transform: translateY(24px);
}

/* ── Nav link hover underline slide ─────────────────────────── */
.nav-link .link-underline {
  position: absolute;
  bottom: 4px;
  left: 14px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
  width: 0;
  transition: width 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ── Card Particle Canvas ────────────────────────────────────── */
.wave-card {
  position: relative;
  overflow: hidden;
}
.wave-card .ripple-canvas {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 10;
  opacity: 0;
  transition: opacity 0.3s ease;
}
.wave-card:hover .ripple-canvas { opacity: 1; }

/* ── Timeline line draw ──────────────────────────────────────── */
.timeline-progress {
  background: linear-gradient(180deg, var(--accent) 0%, rgba(0,163,255,0.1) 100%);
}

/* ── Filter button active anim ───────────────────────────────── */
.filter-btn {
  position: relative;
  overflow: hidden;
}
.filter-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s cubic-bezier(0.16,1,0.3,1);
  z-index: -1;
  border-radius: 100px;
}
.filter-btn.active::before { transform: scaleX(1); }

/* ── Form success message ────────────────────────────────────── */
.form-success {
  margin-top: 16px;
  font-size: var(--size-sm);
  color: #00FF87;
  font-family: var(--font-mono);
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.4s ease, transform 0.4s ease;
}
.form-success.show { opacity: 1; transform: translateY(0); }

/* ── Photo card enter animation ──────────────────────────────── */
.photo-card.visible { opacity: 1; transform: translateY(0); }
.project-card.visible { opacity: 1; transform: translateY(0); }
.timeline-item.visible { opacity: 1; transform: translateX(0); }
.skill-tag.visible { opacity: 1; transform: translateY(0); }
.hero-eyebrow.visible { opacity: 1; }
.hero-subtitle.visible { opacity: 1; }
.hero-cta.visible { opacity: 1; }
.hero-scroll-indicator.visible { opacity: 1; }
.hero-badge.visible { opacity: 1; }
.reveal-text.visible { opacity: 1; transform: translateY(0); }