/* ===================================================
   BIRAJ OLI PORTFOLIO — ANIMATIONS v2
   =================================================== */

/* ===== KEYFRAME ANIMATIONS ===== */
@keyframes orbFloat1 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33%       { transform: translate(50px, -40px) scale(1.06); }
  66%       { transform: translate(-30px, 25px) scale(0.95); }
}

@keyframes orbFloat2 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33%       { transform: translate(-40px, -50px) scale(1.1); }
  66%       { transform: translate(25px, 30px) scale(0.92); }
}

@keyframes orbFloat3 {
  0%, 100% { transform: translate(-50%, -50%) scale(1); }
  50%       { transform: translate(-50%, -50%) scale(1.25); }
}

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

@keyframes floatCard {
  0%, 100% { transform: translateY(0px); }
  50%       { transform: translateY(-12px); }
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 1; box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.5); }
  50%       { transform: scale(1.12); opacity: 0.8; box-shadow: 0 0 0 8px transparent; }
}

@keyframes scrollBounce {
  0%, 100% { transform: translateX(-50%) translateY(0); opacity: 1; }
  50%       { transform: translateX(-50%) translateY(14px); opacity: 0.3; }
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(50px) scale(0.97); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes fadeInLeft {
  from { opacity: 0; transform: translateX(-50px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes fadeInRight {
  from { opacity: 0; transform: translateX(50px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.85); }
  to   { opacity: 1; transform: scale(1); }
}

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

@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0; }
}

@keyframes gradientShift {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

@keyframes glowPulse {
  0%, 100% { box-shadow: 0 0 20px rgba(167,139,250,0.2); }
  50%       { box-shadow: 0 0 50px rgba(167,139,250,0.5); }
}

@keyframes borderGlow {
  0%, 100% { border-color: rgba(167,139,250,0.1); }
  50%       { border-color: rgba(251,191,36,0.3); }
}

/* ===== SCROLL REVEAL CLASSES ===== */
.reveal {
  opacity: 0;
  transform: translateY(48px);
  transition: opacity 0.75s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.75s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.reveal-left {
  transform: translateX(-48px);
}

.reveal.reveal-right {
  transform: translateX(48px);
}

.reveal.revealed {
  opacity: 1;
  transform: translate(0, 0);
}

/* Stagger delays for grid children */
.projects-grid .project-card:nth-child(1) { transition-delay: 0s; }
.projects-grid .project-card:nth-child(2) { transition-delay: 0.1s; }
.projects-grid .project-card:nth-child(3) { transition-delay: 0.2s; }
.projects-grid .project-card:nth-child(4) { transition-delay: 0.1s; }
.projects-grid .project-card:nth-child(5) { transition-delay: 0.2s; }
.projects-grid .project-card:nth-child(6) { transition-delay: 0.3s; }

.blog-grid .blog-card:nth-child(1) { transition-delay: 0s; }
.blog-grid .blog-card:nth-child(2) { transition-delay: 0.12s; }
.blog-grid .blog-card:nth-child(3) { transition-delay: 0.24s; }

.tech-grid .tech-chip:nth-child(1) { transition-delay: 0.04s; }
.tech-grid .tech-chip:nth-child(2) { transition-delay: 0.08s; }
.tech-grid .tech-chip:nth-child(3) { transition-delay: 0.12s; }
.tech-grid .tech-chip:nth-child(4) { transition-delay: 0.16s; }
.tech-grid .tech-chip:nth-child(5) { transition-delay: 0.20s; }
.tech-grid .tech-chip:nth-child(6) { transition-delay: 0.24s; }
.tech-grid .tech-chip:nth-child(7) { transition-delay: 0.28s; }
.tech-grid .tech-chip:nth-child(8) { transition-delay: 0.32s; }

/* ===== HERO GRADIENT ANIMATED BG ===== */
.hero {
  background: linear-gradient(135deg, #0d0a1a, #1a0f33, #0d1a2a, #0d0a1a);
  background-size: 300% 300%;
  animation: gradientShift 14s ease infinite;
}

/* ===== NAV LINK UNDERLINE ANIMATION ===== */
.nav-link { position: relative; }

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
  transition: width 0.3s ease, left 0.3s ease;
}

.nav-link:hover::after, .nav-link.active::after {
  width: calc(100% - 28px);
  left: 14px;
}

/* ===== BUTTON SHINE EFFECT ===== */
.btn-primary::after {
  content: '';
  position: absolute;
  top: -60%;
  left: -70%;
  width: 35%;
  height: 220%;
  background: rgba(255,255,255,0.2);
  transform: skewX(-20deg);
  transition: left 0.55s ease;
}

.btn-primary:hover::after { left: 130%; }

/* ===== GRADIENT TEXT ANIMATION ===== */
.gradient-text {
  animation: gradientShift 5s ease infinite;
  background-size: 200% 200%;
}

/* ===== HERO AVATAR GLOW ===== */
.hero-avatar {
  animation: glowPulse 3s ease-in-out infinite;
}

/* ===== PROJECT CARD TILT SETUP ===== */
.project-card {
  transform-style: preserve-3d;
  will-change: transform;
}

.project-card.visible {
  animation: fadeInUp 0.65s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

/* ===== TECH CHIP ENTRANCE ===== */
.tech-chip {
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.tech-chip:hover {
  transform: translateY(-7px) scale(1.05);
}

/* ===== TESTIMONIAL CARD EFFECT ===== */
.testimonial-card {
  animation: fadeIn 0.5s ease;
}

/* ===== CURSOR GLOW EFFECT ===== */
.cursor-glow {
  position: fixed;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(167,139,250,0.05) 0%, transparent 65%);
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
  transform: translate(-50%, -50%);
  transition: left 0.15s ease, top 0.15s ease;
  mix-blend-mode: screen;
}

/* ===== SECTION DECORATIVE LINES ===== */
.section::before { content: none; }

.projects::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.07), transparent);
}

.skills::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(167,139,250,0.18), transparent);
}

.testimonials::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.07), transparent);
}

/* ===== FLOATING ORBS EXTRA ===== */
.orb-4 {
  width: 250px; height: 250px;
  position: absolute;
  border-radius: 50%;
  filter: blur(70px);
  opacity: 0.3;
  background: radial-gradient(circle, rgba(251,191,36,0.15) 0%, transparent 70%);
  animation: orbFloat2 22s ease-in-out infinite;
  animation-delay: -5s;
}

/* ===== PREFERS-REDUCED-MOTION ===== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

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