/* ============================================
   PORTFOLIO — CLEAN CSS
   ============================================ */

/* 1. SCROLL BEHAVIOUR & SCROLLBAR
   ------------------------------------------ */
html { scroll-behavior: smooth; }

::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: #f1f1f1; }
.dark ::-webkit-scrollbar-track { background: #1f2937; }
::-webkit-scrollbar-thumb {
  background: linear-gradient(to bottom, #6366f1, #8b5cf6);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(to bottom, #4f46e5, #7c3aed);
}

/* 2. KEYFRAMES
   ------------------------------------------ */
@keyframes spin-slow {
  to { transform: rotate(360deg); }
}
@keyframes float-badge {
  0%, 100% { transform: translateY(0px); }
  50%       { transform: translateY(-10px); }
}
@keyframes float-badge-delay {
  0%, 100% { transform: translateY(0px); }
  50%       { transform: translateY(-10px); }
}
@keyframes ambient-drift-one {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50%       { transform: translate(30px, -20px) scale(1.06); }
}
@keyframes ambient-drift-two {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50%       { transform: translate(-40px, 25px) scale(1.08); }
}
@keyframes gradient-shift {
  0%, 100% { background-position: 0% 50%; }
  50%       { background-position: 100% 50%; }
}
@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0; }
}
@keyframes progress-fill {
  from { width: 0 !important; }
}
@keyframes spin-form {
  to { transform: rotate(360deg); }
}
@keyframes particle-burst {
  0%   { transform: translate(0,0) scale(1); opacity: 1; }
  100% { transform: translate(var(--tx), var(--ty)) scale(0); opacity: 0; }
}
@keyframes neon-pulse {
  0%, 100% { box-shadow: 0 0 8px rgba(99,102,241,.5), 0 0 20px rgba(99,102,241,.3); }
  50%       { box-shadow: 0 0 16px rgba(99,102,241,.9), 0 0 40px rgba(99,102,241,.5), 0 0 60px rgba(99,102,241,.2); }
}
@keyframes morph {
  0%, 100% { border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%; }
  50%       { border-radius: 30% 60% 70% 40% / 50% 60% 30% 60%; }
}

/* 3. UTILITY ANIMATIONS
   ------------------------------------------ */
.animate-spin-slow   { animation: spin-slow 8s linear infinite; }
.float-badge         { animation: float-badge 3.5s ease-in-out infinite; }
.float-badge-delay   { animation: float-badge-delay 3.5s ease-in-out 1.2s infinite; }
.ambient-orb-one     { animation: ambient-drift-one 18s ease-in-out infinite; }
.ambient-orb-two     { animation: ambient-drift-two 22s ease-in-out infinite; }
.neon-glow           { animation: neon-pulse 2.5s ease-in-out infinite; }
.morphing-blob       { animation: morph 8s ease-in-out infinite; }

/* 4. HERO GRADIENT TEXT
   ------------------------------------------ */
#hero h1 .bg-clip-text {
  background-size: 200% auto;
  animation: gradient-shift 5s ease infinite;
}

/* 5. TYPING CURSOR
   ------------------------------------------ */
.typing-cursor::after {
  content: '|';
  margin-left: 2px;
  color: #6366f1;
  animation: blink 1s step-end infinite;
}

/* 6. SCROLL PROGRESS BAR
   ------------------------------------------ */
#scroll-progress {
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(to right, #6366f1, #8b5cf6, #a78bfa);
  z-index: 9999;
  transition: width 0.1s linear;
}

/* 7. BACK TO TOP
   ------------------------------------------ */
#back-to-top {
  position: fixed;
  bottom: 2rem; right: 2rem;
  width: 44px; height: 44px;
  border-radius: 9999px;
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  color: white;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .3s ease, transform .3s ease, box-shadow .3s ease;
  z-index: 100;
  box-shadow: 0 4px 15px rgba(99,102,241,.4);
  border: none;
}
#back-to-top.visible { opacity: 1; transform: translateY(0); }
#back-to-top:hover   { transform: translateY(-4px); box-shadow: 0 8px 25px rgba(99,102,241,.55); }

/* 8. NAVIGATION
   ------------------------------------------ */
.nav-link { position: relative; }
.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 2px;
  background: linear-gradient(to right, #6366f1, #8b5cf6);
  transition: width .3s ease;
}
.nav-link:hover::after,
.nav-link.active::after { width: 100%; }
.nav-link.active { color: #6366f1; }

/* 9. MOBILE MENU
   ------------------------------------------ */
#mobile-menu {
  max-height: 0;
  overflow: hidden;
  transition: max-height .35s ease;
}
#mobile-menu.active { max-height: 320px; }

/* 10. SECTION SHELL (subtle bg radials)
    ----------------------------------------- */
.section-shell {
  background-image:
    radial-gradient(circle at 10% 10%, rgba(99,102,241,.07) 0%, transparent 30%),
    radial-gradient(circle at 90% 5%,  rgba(139,92,246,.05) 0%, transparent 25%);
  background-repeat: no-repeat;
}

/* 11. PREMIUM CARD
    ----------------------------------------- */
.premium-card {
  transition: transform .35s cubic-bezier(.22,1,.36,1), box-shadow .35s ease;
}
.premium-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 45px -12px rgba(99,102,241,.2);
}

/* 12. CARD SHIMMER SWEEP
    ----------------------------------------- */
.skill-card,
.project-card,
.premium-card {
  position: relative;
  overflow: hidden;
  isolation: isolate;
}
.skill-card::before,
.project-card::before,
.premium-card::before {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(120deg, transparent 20%, rgba(255,255,255,.18) 50%, transparent 80%);
  transform: translateX(-120%);
  transition: transform .7s cubic-bezier(.22,1,.36,1);
  pointer-events: none;
  z-index: 0;
}
.dark .skill-card::before,
.dark .project-card::before,
.dark .premium-card::before {
  background: linear-gradient(120deg, transparent 20%, rgba(255,255,255,.07) 50%, transparent 80%);
}
.skill-card:hover::before,
.project-card:hover::before,
.premium-card:hover::before { transform: translateX(120%); }
.skill-card > *,
.project-card > *,
.premium-card > * { position: relative; z-index: 1; }

/* 13. SECTION TITLE UNDERLINE
    ----------------------------------------- */
.section-title-line { position: relative; display: inline-block; }
.section-title-line::after {
  content: '';
  position: absolute;
  bottom: -6px; left: 0;
  width: 0; height: 3px;
  background: linear-gradient(to right, #6366f1, #8b5cf6);
  border-radius: 2px;
  transition: width 1s cubic-bezier(.22,1,.36,1) .3s;
}
.section-title-line.in-view::after { width: 100%; }

/* 14. STAGGER DELAYS
    ----------------------------------------- */
.delay-100  { transition-delay: .10s !important; }
.delay-200  { transition-delay: .20s !important; }
.delay-300  { transition-delay: .30s !important; }
.delay-400  { transition-delay: .40s !important; }
.delay-500  { transition-delay: .50s !important; }
.delay-600  { transition-delay: .60s !important; }
.delay-700  { transition-delay: .70s !important; }
.delay-800  { transition-delay: .80s !important; }

/* 15. SCROLL REVEAL — BASE STATES (hidden)
    ----------------------------------------- */
.anim-fade-up {
  opacity: 0;
  transform: translateY(55px);
  transition: opacity .85s cubic-bezier(.22,1,.36,1),
              transform .85s cubic-bezier(.22,1,.36,1);
}
.anim-fade-down {
  opacity: 0;
  transform: translateY(-55px);
  transition: opacity .85s cubic-bezier(.22,1,.36,1),
              transform .85s cubic-bezier(.22,1,.36,1);
}
.anim-slide-left {
  opacity: 0;
  transform: translateX(-80px);
  transition: opacity .9s cubic-bezier(.22,1,.36,1),
              transform .9s cubic-bezier(.22,1,.36,1);
}
.anim-slide-right {
  opacity: 0;
  transform: translateX(80px);
  transition: opacity .9s cubic-bezier(.22,1,.36,1),
              transform .9s cubic-bezier(.22,1,.36,1);
}
.anim-scale {
  opacity: 0;
  transform: scale(.7);
  transition: opacity .75s cubic-bezier(.34,1.56,.64,1),
              transform .75s cubic-bezier(.34,1.56,.64,1);
}
.anim-flip {
  opacity: 0;
  transform: perspective(800px) rotateY(60deg);
  transition: opacity .9s cubic-bezier(.22,1,.36,1),
              transform .9s cubic-bezier(.22,1,.36,1);
}
.skill-card {
  opacity: 0;
  transform: translateY(45px) scale(.94);
  transition: opacity .8s cubic-bezier(.22,1,.36,1),
              transform .8s cubic-bezier(.22,1,.36,1),
              box-shadow .3s ease;
}
.project-card {
  opacity: 0;
  transform: translateY(55px);
  transition: opacity .85s cubic-bezier(.22,1,.36,1),
              transform .85s cubic-bezier(.22,1,.36,1),
              box-shadow .3s ease;
}
.timeline-item {
  opacity: 0;
  transform: translateX(-45px);
  transition: opacity .8s cubic-bezier(.22,1,.36,1),
              transform .8s cubic-bezier(.22,1,.36,1);
}

/* 16. SCROLL REVEAL — IN-VIEW STATES (visible)
    ----------------------------------------- */
.anim-fade-up.in-view,
.anim-fade-down.in-view  { opacity: 1; transform: translateY(0); }
.anim-slide-left.in-view { opacity: 1; transform: translateX(0); }
.anim-slide-right.in-view{ opacity: 1; transform: translateX(0); }
.anim-scale.in-view      { opacity: 1; transform: scale(1); }
.anim-flip.in-view       { opacity: 1; transform: perspective(800px) rotateY(0deg); }
.skill-card.in-view      { opacity: 1; transform: translateY(0) scale(1); }
.project-card.in-view    { opacity: 1; transform: translateY(0); }
.timeline-item.in-view   { opacity: 1; transform: translateX(0); }

/* 17. CARD HOVER EFFECTS
    ----------------------------------------- */
.skill-card:hover {
  transform: translateY(-12px) scale(1.04) !important;
  box-shadow: 0 28px 55px -14px rgba(99,102,241,.35) !important;
  z-index: 10;
}
.project-card:hover {
  transform: translateY(-14px) scale(1.02) !important;
  box-shadow: 0 32px 60px -16px rgba(99,102,241,.38) !important;
  z-index: 10;
}

/* 18. TIMELINE CONNECTOR
    ----------------------------------------- */
.timeline-item { position: relative; }
.timeline-item::before {
  content: '';
  position: absolute;
  left: -2px; top: 16px;
  width: 2px;
  height: calc(100% + 32px);
  background: linear-gradient(to bottom, rgba(99,102,241,.4), rgba(99,102,241,.05));
}
.timeline-item:last-child::before { display: none; }

/* 19. SKILL PROGRESS BARS
    ----------------------------------------- */
.skill-card .h-2 > div {
  transition: width 1.3s cubic-bezier(.22,1,.36,1) .25s;
}

/* 20. FORM
    ----------------------------------------- */
input, textarea {
  transition: box-shadow .3s ease, transform .3s ease;
}
input:focus, textarea:focus {
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(99,102,241,.18);
}
.loading-spinner {
  display: inline-block;
  width: 20px; height: 20px;
  border: 2px solid rgba(255,255,255,.3);
  border-radius: 50%;
  border-top-color: white;
  animation: spin-form 1s linear infinite;
}

/* 21. CONTACT CARD GLOW
    ----------------------------------------- */
#contact .premium-card:hover {
  box-shadow: 0 0 0 2px rgba(99,102,241,.25),
              0 20px 40px -12px rgba(99,102,241,.18);
}

/* 22. FOOTER SOCIAL
    ----------------------------------------- */
footer a {
  transition: transform .25s ease, color .25s ease;
  display: inline-block;
}
footer a:hover { transform: translateY(-3px); }

/* 23. CURSOR GLOW (injected by JS)
    ----------------------------------------- */
#cursor-glow {
  pointer-events: none;
  z-index: 0;
  mix-blend-mode: normal;
}

/* 24. REDUCE MOTION
    ----------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  html { scroll-behavior: auto; }
  /* Force show all animated elements */
  .anim-fade-up, .anim-fade-down,
  .anim-slide-left, .anim-slide-right,
  .anim-scale, .anim-flip,
  .skill-card, .project-card, .timeline-item {
    opacity: 1 !important;
    transform: none !important;
  }
}

/* 25. AMBIENT ORBS
    ----------------------------------------- */
.ambient-orb-one {
  animation: ambient-drift-one 18s ease-in-out infinite;
}
.ambient-orb-two {
  animation: ambient-drift-two 22s ease-in-out infinite;
}

/* 26. RESPONSIVE TWEAKS
    ----------------------------------------- */
@media (max-width: 768px) {
  .anim-fade-up    { transform: translateY(30px); }
  .anim-slide-left { transform: translateX(-35px); }
  .anim-slide-right{ transform: translateX(35px); }
}