/* ============================================================
   MUHAMMAD ABDULLAH PORTFOLIO — ANIMATIONS & TRANSITIONS
   Rich motion system for every section
   ============================================================ */

/* ── PAGE LOAD SEQUENCE ── */
@keyframes pageReveal {
  from { opacity: 0; }
  to   { opacity: 1; }
}
body { animation: pageReveal 0.4s ease forwards; }


/* ── SCROLL PROGRESS BAR ── */
#scroll-progress {
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, #3b82f6, #8b5cf6, #06b6d4);
  z-index: 9999;
  transition: width 0.1s linear;
  box-shadow: 0 0 10px rgba(96,165,250,0.6);
}

/* ══════════════════════════════════════════
   ENHANCED REVEAL SYSTEM
   ══════════════════════════════════════════ */
.reveal-up {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s cubic-bezier(0.16,1,0.3,1),
              transform 0.8s cubic-bezier(0.16,1,0.3,1);
}
.reveal-up.visible { opacity: 1; transform: translateY(0); }

.reveal-down {
  opacity: 0;
  transform: translateY(-40px);
  transition: opacity 0.8s cubic-bezier(0.16,1,0.3,1),
              transform 0.8s cubic-bezier(0.16,1,0.3,1);
}
.reveal-down.visible { opacity: 1; transform: translateY(0); }

.reveal-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.8s cubic-bezier(0.16,1,0.3,1),
              transform 0.8s cubic-bezier(0.16,1,0.3,1);
}
.reveal-right.visible { opacity: 1; transform: translateX(0); }

.reveal-zoom {
  opacity: 0;
  transform: scale(0.85);
  transition: opacity 0.7s ease,
              transform 0.7s cubic-bezier(0.34,1.56,0.64,1);
}
.reveal-zoom.visible { opacity: 1; transform: scale(1); }

.reveal-flip {
  opacity: 0;
  transform: rotateX(20deg) translateY(30px);
  transition: opacity 0.8s ease,
              transform 0.8s cubic-bezier(0.16,1,0.3,1);
  transform-origin: top center;
}
.reveal-flip.visible { opacity: 1; transform: rotateX(0) translateY(0); }

/* Stagger delays */
.stag-1 { transition-delay: 0.05s !important; }
.stag-2 { transition-delay: 0.12s !important; }
.stag-3 { transition-delay: 0.20s !important; }
.stag-4 { transition-delay: 0.28s !important; }
.stag-5 { transition-delay: 0.36s !important; }
.stag-6 { transition-delay: 0.44s !important; }

/* Project card delay classes */
.d1 { transition-delay: 0.1s !important; }
.d2 { transition-delay: 0.2s !important; }
.d3 { transition-delay: 0.3s !important; }
.d4 { transition-delay: 0.4s !important; }
.d5 { transition-delay: 0.5s !important; }
.d6 { transition-delay: 0.6s !important; }
.d7 { transition-delay: 0.7s !important; }

/* ══════════════════════════════════════════
   HERO SECTION ANIMATIONS
   ══════════════════════════════════════════ */

/* Floating particles canvas */
#hero-particles {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

/* Hero content entrance - enhanced */
.hero-content {
  animation: heroSlideIn 1s cubic-bezier(0.16,1,0.3,1) 0.1s both !important;
}
@keyframes heroSlideIn {
  from { opacity: 0; transform: translateX(-50px); }
  to   { opacity: 1; transform: translateX(0); }
}

.hero-visual {
  animation: heroVisualIn 1s cubic-bezier(0.16,1,0.3,1) 0.3s both !important;
}
@keyframes heroVisualIn {
  from { opacity: 0; transform: translateX(50px); }
  to   { opacity: 1; transform: translateX(0); }
}

.status-indicator {
  animation: fadeScaleIn 0.6s ease 0.5s both;
}
@keyframes fadeScaleIn {
  from { opacity: 0; transform: scale(0.8); }
  to   { opacity: 1; transform: scale(1); }
}

.hero-title {
  animation: titleReveal 0.9s cubic-bezier(0.16,1,0.3,1) 0.65s both;
}
@keyframes titleReveal {
  from { opacity: 0; transform: translateY(30px); clip-path: inset(0 0 100% 0); }
  to   { opacity: 1; transform: translateY(0); clip-path: inset(0 0 0% 0); }
}

.hero-subtitle {
  animation: fadeUp 0.8s ease 0.85s both;
}
.hero-actions {
  animation: fadeUp 0.8s ease 1s both;
}

/* Typewriter cursor blink */
@keyframes blink {
  0%,100% { opacity: 1; }
  50%      { opacity: 0; }
}
.typewriter-cursor {
  display: inline-block;
  width: 3px; height: 1em;
  background: #60a5fa;
  vertical-align: middle;
  margin-left: 2px;
  animation: blink 1s step-end infinite;
}

/* Floating gradient orbs in hero */
.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  pointer-events: none;
  animation: orbDrift var(--dur, 10s) ease-in-out infinite alternate;
}
@keyframes orbDrift {
  from { transform: translate(0,0) scale(1); }
  to   { transform: translate(var(--dx,20px), var(--dy,-20px)) scale(1.1); }
}

/* ══════════════════════════════════════════
   NAVBAR ENHANCED
   ══════════════════════════════════════════ */
.navbar {
  animation: navbarDrop 0.7s cubic-bezier(0.16,1,0.3,1) both !important;
}
@keyframes navbarDrop {
  from { opacity: 0; transform: translateY(-100%); }
  to   { opacity: 1; transform: translateY(0); }
}

.nav-link {
  position: relative;
  transition: color 0.3s ease, background 0.3s ease, transform 0.25s ease !important;
}
.nav-link::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(96,165,250,0.12), rgba(167,139,250,0.12));
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: -1;
}
.nav-link:hover::before { opacity: 1; }

/* Logo shimmer animation */
.nav-logo {
  position: relative;
  overflow: hidden;
}
.nav-logo::after {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 60%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.25), transparent);
  animation: logoShimmer 3s ease-in-out infinite;
  transform: skewX(-20deg);
}
@keyframes logoShimmer {
  0% { left: -100%; }
  50%, 100% { left: 150%; }
}

/* ══════════════════════════════════════════
   SECTION HEADER ANIMATIONS
   ══════════════════════════════════════════ */
.section-badge {
  animation-fill-mode: both;
  position: relative;
  overflow: hidden;
}
.section-badge::after {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 100%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(6,182,212,0.2), transparent);
  animation: badgeShimmer 2.5s ease-in-out infinite;
}
@keyframes badgeShimmer {
  0% { left: -100%; }
  60%, 100% { left: 200%; }
}

.section-title {
  background-size: 200% auto;
  animation: gradientFlow 5s linear infinite;
}
@keyframes gradientFlow {
  0%   { background-position: 0% center; }
  100% { background-position: -200% center; }
}

/* ══════════════════════════════════════════
   PROFILE SECTION
   ══════════════════════════════════════════ */
.profile-card {
  transition: transform 0.4s cubic-bezier(0.34,1.56,0.64,1),
              box-shadow 0.4s ease,
              border-color 0.4s ease !important;
}
.profile-card:hover {
  transform: translateY(-8px) scale(1.02) !important;
}

/* Profile image ring animation */
.profile-img-wrapper {
  position: relative;
}
.profile-img-wrapper::before {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 24px;
  background: conic-gradient(from 0deg, #3b82f6, #8b5cf6, #06b6d4, #3b82f6);
  z-index: -1;
  animation: ringRotate 4s linear infinite;
  opacity: 0;
  transition: opacity 0.4s ease;
}
.profile-img-wrapper:hover::before { opacity: 1; }
@keyframes ringRotate {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

/* Stats counter animation */
.stat-box {
  transition: transform 0.4s cubic-bezier(0.34,1.56,0.64,1),
              background 0.3s ease,
              border-color 0.3s ease,
              box-shadow 0.4s ease;
  position: relative;
  overflow: hidden;
}
.stat-box::before {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 100%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(96,165,250,0.06), transparent);
  transition: left 0.5s ease;
}
.stat-box:hover::before { left: 100%; }
.stat-box:hover {
  transform: translateY(-6px) scale(1.04);
  border-color: rgba(96,165,250,0.4);
  box-shadow: 0 12px 40px rgba(59,130,246,0.2);
}

.stat-number {
  display: inline-block;
  transition: transform 0.3s ease;
}
.stat-box:hover .stat-number {
  transform: scale(1.1);
}

/* About block typing animation */
.about-block {
  transition: transform 0.4s ease, box-shadow 0.4s ease !important;
}
.about-block:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 60px rgba(0,0,0,0.3) !important;
}

/* ══════════════════════════════════════════
   PROJECTS SECTION
   ══════════════════════════════════════════ */
.project-card {
  position: relative;
  overflow: hidden;
  transition: transform 0.45s cubic-bezier(0.34,1.4,0.64,1),
              box-shadow 0.45s ease,
              border-color 0.45s ease !important;
}

/* Card shine sweep on hover */
.project-card::after {
  content: '';
  position: absolute;
  top: -50%; left: -70%;
  width: 60%; height: 200%;
  background: linear-gradient(
    105deg,
    transparent 20%,
    rgba(255,255,255,0.04) 50%,
    transparent 80%
  );
  transform: rotate(0deg);
  transition: left 0.6s ease;
  pointer-events: none;
}
.project-card:hover::after { left: 120%; }


/* Tech tag pop animation */
.tech-tag {
  transition: transform 0.25s cubic-bezier(0.34,1.56,0.64,1),
              background 0.25s ease,
              color 0.25s ease,
              box-shadow 0.25s ease;
}
.tech-tag:hover {
  transform: translateY(-3px) scale(1.08);
  background: rgba(96,165,250,0.18);
  color: #60a5fa;
  box-shadow: 0 4px 12px rgba(59,130,246,0.25);
}

/* Metric value pulse */
.metric-value {
  transition: color 0.3s ease, transform 0.3s ease;
}
.project-card:hover .metric-value {
  color: #60a5fa;
  transform: scale(1.05);
}

/* View Details button */
.project-expand {
  position: relative;
  overflow: hidden;
  transition: transform 0.3s cubic-bezier(0.34,1.56,0.64,1),
              box-shadow 0.3s ease,
              background 0.3s ease !important;
}
.project-expand::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #60a5fa, #a78bfa);
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: -1;
  border-radius: inherit;
}
.project-expand:hover::before { opacity: 1; }

/* ══════════════════════════════════════════
   SKILLS SECTION
   ══════════════════════════════════════════ */

/* Skill bar animated fill */
.skill-progress {
  position: relative;
  width: 0% !important;
  transition: width 1.4s cubic-bezier(0.16,1,0.3,1) !important;
  overflow: hidden;
}
.skill-progress::after {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 40px; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.35));
  animation: barShine 2s ease-in-out infinite;
}
@keyframes barShine {
  0%,100% { opacity: 0; }
  50%      { opacity: 1; }
}
.skill-progress.animated {
  width: var(--target-width) !important;
}

/* Skill item hover */
.skill-item {
  transition: transform 0.3s ease, background 0.3s ease;
  border-radius: 8px;
  padding: 4px 8px;
}
.skill-item:hover {
  transform: translateX(6px);
  background: rgba(96,165,250,0.04);
}

/* Tab button enhanced transitions */
.tab-button {
  transition: all 0.3s cubic-bezier(0.34,1.3,0.64,1) !important;
  position: relative;
  overflow: hidden;
}
.tab-button::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 0%; height: 2px;
  background: linear-gradient(90deg, #3b82f6, #8b5cf6);
  transition: width 0.3s ease;
}
.tab-button:hover::after,
.tab-button.active::after { width: 100%; }

.tab-button:hover {
  transform: translateY(-3px) scale(1.03) !important;
}

/* Tab panel fade transition */
.tab-panel {
  transition: opacity 0.35s ease, transform 0.35s ease;
  opacity: 0;
  transform: translateY(10px);
  display: none;
}
.tab-panel.active {
  opacity: 1;
  transform: translateY(0);
  display: block;
  animation: tabIn 0.4s cubic-bezier(0.16,1,0.3,1) forwards;
}
@keyframes tabIn {
  from { opacity: 0; transform: translateY(12px) scale(0.98); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

/* ══════════════════════════════════════════
   EXPERIENCE / TIMELINE
   ══════════════════════════════════════════ */
.timeline-item {
  position: relative;
  transition: transform 0.4s ease;
}

.timeline-content {
  transition: transform 0.4s cubic-bezier(0.34,1.3,0.64,1),
              box-shadow 0.4s ease,
              border-color 0.4s ease !important;
}
.timeline-content:hover {
  transform: translateX(8px) !important;
  box-shadow: 0 16px 50px rgba(0,0,0,0.35),
              -4px 0 0 rgba(96,165,250,0.5) !important;
  border-color: rgba(96,165,250,0.35) !important;
}

/* Timeline marker pulse */
.timeline-marker {
  position: relative;
  animation: markerPulse 3s ease-in-out infinite;
}
@keyframes markerPulse {
  0%,100% { box-shadow: 0 0 0 0 rgba(6,182,212,0.5); }
  50%      { box-shadow: 0 0 0 10px rgba(6,182,212,0); }
}

/* Timeline line draw animation */
.timeline::before {
  content: '';
  position: absolute;
  left: 20px; top: 0;
  width: 2px; height: 0%;
  background: linear-gradient(to bottom, #3b82f6, #8b5cf6, #06b6d4);
  transition: height 2s cubic-bezier(0.16,1,0.3,1);
  z-index: 0;
}
.timeline.line-drawn::before { height: 100%; }

/* ══════════════════════════════════════════
   INSIGHTS SECTION (CHART)
   ══════════════════════════════════════════ */
.insights-card,
.skills-chart {
  transition: transform 0.4s ease, box-shadow 0.4s ease, border-color 0.4s ease !important;
}
.insights-card:hover,
.skills-chart:hover {
  transform: translateY(-6px) !important;
  box-shadow: 0 24px 60px rgba(0,0,0,0.35) !important;
  border-color: rgba(96,165,250,0.25) !important;
}

/* Chart legend items */
.legend-item {
  transition: transform 0.25s ease, opacity 0.25s ease;
  cursor: default;
}
.legend-item:hover { transform: scale(1.05); }

/* ══════════════════════════════════════════
   CONTACT SECTION
   ══════════════════════════════════════════ */
.contact-item {
  transition: transform 0.35s cubic-bezier(0.34,1.4,0.64,1),
              background 0.35s ease,
              border-color 0.35s ease,
              box-shadow 0.35s ease !important;
}
.contact-item:hover {
  transform: translateX(8px) scale(1.01) !important;
  border-color: rgba(96,165,250,0.3) !important;
  box-shadow: 0 8px 30px rgba(0,0,0,0.25) !important;
}
.contact-item .contact-icon {
  transition: transform 0.35s cubic-bezier(0.34,1.56,0.64,1),
              background 0.35s ease;
}
.contact-item:hover .contact-icon {
  transform: scale(1.15) rotate(5deg);
  background: rgba(96,165,250,0.15);
}

/* Form input focus animations */
.form-input,
.form-textarea {
  transition: border-color 0.3s ease,
              box-shadow 0.3s ease,
              background 0.3s ease,
              transform 0.2s ease !important;
}
.form-input:focus,
.form-textarea:focus {
  border-color: rgba(96,165,250,0.5) !important;
  box-shadow: 0 0 0 3px rgba(59,130,246,0.12),
              0 4px 20px rgba(0,0,0,0.2) !important;
  transform: translateY(-2px) !important;
  background: rgba(255,255,255,0.06) !important;
  outline: none !important;
}

/* Submit button */
.submit-btn,
.btn-submit {
  position: relative;
  overflow: hidden;
  transition: transform 0.35s cubic-bezier(0.34,1.56,0.64,1),
              box-shadow 0.35s ease !important;
}
.submit-btn::before,
.btn-submit::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.15), transparent);
  opacity: 0;
  transition: opacity 0.3s ease;
}
.submit-btn:hover::before,
.btn-submit:hover::before { opacity: 1; }
.submit-btn:hover,
.btn-submit:hover {
  transform: translateY(-4px) scale(1.02) !important;
  box-shadow: 0 20px 50px rgba(249,115,22,0.5) !important;
}

/* Social links bounce */
.social-link {
  transition: transform 0.35s cubic-bezier(0.34,1.56,0.64,1),
              color 0.3s ease,
              background 0.3s ease,
              box-shadow 0.3s ease !important;
}
.social-link:hover {
  transform: translateY(-6px) scale(1.15) !important;
  box-shadow: 0 12px 30px rgba(59,130,246,0.3) !important;
}

/* ══════════════════════════════════════════
   BADGES
   ══════════════════════════════════════════ */
.badge {
  transition: transform 0.3s cubic-bezier(0.34,1.56,0.64,1),
              background 0.3s ease,
              color 0.3s ease,
              box-shadow 0.3s ease;
}
.badge:hover {
  transform: translateY(-4px) scale(1.08);
  background: rgba(96,165,250,0.18);
  color: #60a5fa;
  box-shadow: 0 6px 20px rgba(59,130,246,0.25);
}

/* ══════════════════════════════════════════
   SECTION TRANSITIONS (background shifts)
   ══════════════════════════════════════════ */
section {
  position: relative;
}

/* Divider wave between sections */
.section-wave {
  position: absolute;
  bottom: -2px; left: 0;
  width: 100%; height: 60px;
  overflow: hidden;
  z-index: 2;
  pointer-events: none;
}
.section-wave svg {
  width: 100%; height: 100%;
}

/* ══════════════════════════════════════════
   SCROLL-TRIGGERED SECTION SLIDE-IN
   ══════════════════════════════════════════ */
.section-enter {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.9s ease, transform 0.9s cubic-bezier(0.16,1,0.3,1);
}
.section-enter.entered {
  opacity: 1;
  transform: translateY(0);
}

/* ══════════════════════════════════════════
   FOOTER / CONTACT BOTTOM
   ══════════════════════════════════════════ */
footer, .footer {
  position: relative;
}
.footer-link {
  transition: color 0.3s ease, transform 0.3s ease;
  display: inline-block;
}
.footer-link:hover {
  color: #60a5fa;
  transform: translateX(4px);
}

/* ══════════════════════════════════════════
   GLOBAL BUTTON PRESS EFFECT
   ══════════════════════════════════════════ */
.btn-primary:active,
.btn-secondary:active,
.project-expand:active,
.submit-btn:active,
.nav-cta:active {
  transform: scale(0.97) !important;
  transition-duration: 0.1s !important;
}

/* ══════════════════════════════════════════
   LOADING SPINNER (page transitions)
   ══════════════════════════════════════════ */
#page-loader {
  position: fixed;
  inset: 0;
  background: #070912;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 99999;
  animation: loaderFade 0.5s ease 0.8s forwards;
}
@keyframes loaderFade {
  from { opacity: 1; visibility: visible; }
  to   { opacity: 0; visibility: hidden; }
}
.loader-ring {
  width: 48px; height: 48px;
  border: 3px solid rgba(96,165,250,0.15);
  border-top-color: #60a5fa;
  border-radius: 50%;
  animation: loaderSpin 0.8s linear infinite;
}
@keyframes loaderSpin {
  to { transform: rotate(360deg); }
}
.loader-dot {
  position: absolute;
  width: 8px; height: 8px;
  background: linear-gradient(135deg, #60a5fa, #a78bfa);
  border-radius: 50%;
  animation: loaderDotPulse 1s ease-in-out infinite;
}
@keyframes loaderDotPulse {
  0%,100% { transform: scale(0.8); opacity: 0.6; }
  50%      { transform: scale(1.2); opacity: 1; }
}

/* ══════════════════════════════════════════
   SECTION BADGE ENTRANCE (extra pop)
   ══════════════════════════════════════════ */
.section-badge {
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.section-badge:hover {
  transform: scale(1.05);
  box-shadow: 0 0 20px rgba(6,182,212,0.25);
}

/* ══════════════════════════════════════════
   EXPERIENCE CONTRIBUTIONS LIST
   ══════════════════════════════════════════ */
.timeline-contributions li {
  position: relative;
  transition: transform 0.25s ease, color 0.25s ease;
  padding-left: 4px;
}
.timeline-contributions li:hover {
  transform: translateX(6px);
  color: rgba(255,255,255,0.95);
}

/* ══════════════════════════════════════════
   PARTICLE FLOAT (decorative dots in bg)
   ══════════════════════════════════════════ */
.particle {
  position: fixed;
  border-radius: 50%;
  pointer-events: none;
  animation: particleDrift linear infinite;
  z-index: -1;
  opacity: 0;
}
@keyframes particleDrift {
  0%   { transform: translateY(100vh) scale(0); opacity: 0; }
  10%  { opacity: 0.6; }
  90%  { opacity: 0.3; }
  100% { transform: translateY(-100px) scale(1.2); opacity: 0; }
}

/* ══════════════════════════════════════════
   SECTION TRANSITION OVERLAY (page feel)
   ══════════════════════════════════════════ */
.section-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    transparent 0%,
    rgba(7,9,18,0.03) 50%,
    transparent 100%
  );
  pointer-events: none;
  z-index: 1;
}

/* ══════════════════════════════════════════
   SCROLL INDICATOR (hero bottom)
   ══════════════════════════════════════════ */
.scroll-indicator {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  opacity: 0.5;
  animation: scrollBounce 2s ease-in-out infinite, fadeIn 1.5s ease 1.5s both;
  cursor: pointer;
  z-index: 10;
}
.scroll-indicator span {
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.6);
  font-family: var(--font-mono, monospace);
}
.scroll-indicator-arrow {
  width: 20px; height: 20px;
  border-right: 2px solid rgba(255,255,255,0.5);
  border-bottom: 2px solid rgba(255,255,255,0.5);
  transform: rotate(45deg);
}
@keyframes scrollBounce {
  0%,100% { transform: translateX(-50%) translateY(0); }
  50%      { transform: translateX(-50%) translateY(6px); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 0.5; }
}

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