/* ===== VARIABLES ===== */
:root {
  --bg:        #050a18;
  --bg2:       #0b1224;
  --bg3:       #0f1a30;
  --card:      rgba(255,255,255,0.04);
  --card-h:    rgba(255,255,255,0.07);
  --border:    rgba(255,255,255,0.08);
  --border-h:  rgba(0,212,255,0.35);
  --accent:    #00d4ff;
  --accent2:   #7928ca;
  --grad:      linear-gradient(135deg, #00d4ff, #7928ca);
  --grad-r:    linear-gradient(135deg, #7928ca, #00d4ff);
  --text:      #e2e8f0;
  --text2:     #94a3b8;
  --text3:     #4a5568;
  --glow:      0 0 25px rgba(0,212,255,0.25);
  --glow2:     0 0 40px rgba(121,40,202,0.25);
  --radius:    16px;
  --tr:        0.3s ease;
}

/* ===== RESET ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', sans-serif;
  background: var(--bg);
  color: var(--text);
  overflow-x: hidden;
  line-height: 1.7;
}
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--accent); border-radius: 3px; }

/* ===== SCROLL PROGRESS ===== */
.scroll-progress {
  position: fixed; top: 0; left: 0; height: 3px; width: 0;
  background: var(--grad); z-index: 9999;
  transition: width 0.1s linear;
}

/* ===== CUSTOM CURSOR ===== */
.cursor {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--accent);
  position: fixed; pointer-events: none;
  z-index: 9998; transform: translate(-50%,-50%);
  transition: transform 0.1s, background 0.2s;
}
.cursor-follower {
  width: 35px; height: 35px; border-radius: 50%;
  border: 1.5px solid rgba(0,212,255,0.5);
  position: fixed; pointer-events: none;
  z-index: 9997; transform: translate(-50%,-50%);
  transition: transform 0.12s ease, width 0.2s, height 0.2s, border-color 0.2s;
}
.cursor.hover { transform: translate(-50%,-50%) scale(2); background: var(--accent2); }
.cursor-follower.hover { width: 50px; height: 50px; border-color: var(--accent2); }

@media (pointer: coarse) { .cursor, .cursor-follower { display: none; } }

/* ===== UTILITY ===== */
.container { max-width: 1140px; margin: 0 auto; padding: 0 24px; }
.gradient-text {
  background: var(--grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ===== REVEAL ANIMATIONS ===== */
.reveal, .reveal-up {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible, .reveal-up.visible { opacity: 1; transform: translateY(0); }

/* staggered children */
.reveal:nth-child(2) { transition-delay: 0.1s; }
.reveal:nth-child(3) { transition-delay: 0.2s; }
.reveal:nth-child(4) { transition-delay: 0.3s; }
.reveal:nth-child(5) { transition-delay: 0.4s; }
.reveal:nth-child(6) { transition-delay: 0.15s; }

/* ===== NAVIGATION ===== */
#navbar {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 1000; padding: 20px 0;
  transition: background 0.4s, padding 0.4s, box-shadow 0.4s;
}
#navbar.scrolled {
  background: rgba(5,10,24,0.9);
  backdrop-filter: blur(20px);
  padding: 12px 0;
  box-shadow: 0 2px 30px rgba(0,0,0,0.4);
}
.nav-container {
  max-width: 1140px; margin: 0 auto;
  padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between;
}
.nav-logo {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.5rem; font-weight: 700;
  color: var(--text);
}
.nav-logo span { color: var(--accent); }
.nav-links { display: flex; gap: 36px; }
.nav-link {
  font-size: 0.875rem; font-weight: 500;
  color: var(--text2);
  transition: color var(--tr);
  position: relative;
}
.nav-link::after {
  content: ''; position: absolute; bottom: -4px; left: 0;
  width: 0; height: 2px;
  background: var(--grad);
  transition: width var(--tr);
}
.nav-link:hover, .nav-link.active { color: var(--accent); }
.nav-link:hover::after, .nav-link.active::after { width: 100%; }
.hamburger { display: none; flex-direction: column; gap: 5px; padding: 4px; }
.hamburger span {
  display: block; width: 24px; height: 2px;
  background: var(--text); border-radius: 2px;
  transition: var(--tr);
}

/* ===== HERO ===== */
#hero {
  position: relative; height: 100vh; min-height: 700px;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}
#particleCanvas {
  position: absolute; inset: 0; width: 100%; height: 100%;
}
.hero-content {
  position: relative; z-index: 2;
  text-align: center; padding: 0 24px;
  max-width: 800px;
}
.hero-greeting {
  font-size: 1.1rem; color: var(--accent);
  font-family: 'JetBrains Mono', monospace;
  margin-bottom: 12px; letter-spacing: 0.05em;
}
.hero-name {
  font-size: clamp(3rem, 8vw, 5.5rem);
  font-weight: 900; line-height: 1.1;
  margin-bottom: 20px; letter-spacing: -0.02em;
}
.hero-subtitle {
  font-size: clamp(1.1rem, 3vw, 1.5rem);
  font-family: 'JetBrains Mono', monospace;
  color: var(--text2); margin-bottom: 20px;
  min-height: 2rem;
}
.typewriter-text { color: var(--accent); }
.blink-cursor {
  display: inline-block;
  color: var(--accent);
  animation: blink 1s step-end infinite;
}
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0} }
.hero-desc {
  font-size: 1rem; color: var(--text2);
  margin-bottom: 36px; line-height: 1.8;
}
.hero-desc strong { color: var(--accent); }
.hero-buttons {
  display: flex; gap: 16px; justify-content: center;
  flex-wrap: wrap; margin-bottom: 40px;
}
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 28px; border-radius: 50px;
  font-size: 0.95rem; font-weight: 600;
  transition: all var(--tr); position: relative; overflow: hidden;
}
.btn::before {
  content: ''; position: absolute; inset: 0;
  background: rgba(255,255,255,0.08);
  opacity: 0; transition: opacity var(--tr);
}
.btn:hover::before { opacity: 1; }
.btn-primary {
  background: var(--grad);
  color: #fff;
  box-shadow: 0 0 20px rgba(0,212,255,0.3);
}
.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(0,212,255,0.45);
}
.btn-outline {
  border: 1.5px solid rgba(0,212,255,0.5);
  color: var(--accent);
}
.btn-outline:hover {
  background: rgba(0,212,255,0.1);
  border-color: var(--accent);
  transform: translateY(-3px);
}
.btn-full { width: 100%; justify-content: center; }
.hero-socials {
  display: flex; gap: 20px; justify-content: center;
}
.hero-socials a {
  width: 44px; height: 44px; border-radius: 50%;
  border: 1.5px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  color: var(--text2); font-size: 1.1rem;
  transition: all var(--tr);
}
.hero-socials a:hover {
  border-color: var(--accent); color: var(--accent);
  box-shadow: var(--glow); transform: translateY(-3px);
}
.scroll-down {
  position: absolute; bottom: 32px; left: 50%; transform: translateX(-50%);
  z-index: 2; display: flex; flex-direction: column; align-items: center; gap: 8px;
  color: var(--text3); font-size: 0.75rem; letter-spacing: 0.1em; text-transform: uppercase;
  animation: float 2.5s ease-in-out infinite;
}
.scroll-dot {
  width: 1px; height: 40px;
  background: linear-gradient(to bottom, var(--accent), transparent);
}
@keyframes float { 0%,100%{transform:translateX(-50%) translateY(0)} 50%{transform:translateX(-50%) translateY(-8px)} }

/* ===== SECTION COMMON ===== */
section { padding: 100px 0; }
section:nth-child(even) { background: var(--bg2); }
.section-header { text-align: center; margin-bottom: 60px; }
.section-number {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem; color: var(--accent);
  opacity: 0.5; display: block; margin-bottom: 8px;
}
.section-tag {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem; color: var(--accent);
  letter-spacing: 0.15em; text-transform: uppercase;
  display: block; margin-bottom: 12px;
}
.section-header h2 {
  font-size: clamp(2rem, 5vw, 2.8rem);
  font-weight: 800; letter-spacing: -0.02em;
  position: relative; display: inline-block;
}
.section-header h2::after {
  content: ''; position: absolute; bottom: -10px; left: 50%; transform: translateX(-50%);
  width: 50px; height: 3px; background: var(--grad); border-radius: 2px;
}

/* ===== ABOUT ===== */
#about { background: var(--bg); }
.about-grid {
  display: grid; grid-template-columns: 1fr 1.6fr;
  gap: 60px; align-items: center;
}
.about-image-wrap {
  position: relative; display: flex; justify-content: center;
}
.avatar-ring {
  width: 260px; height: 260px; border-radius: 50%;
  background: var(--grad);
  padding: 3px; position: relative;
  animation: spin-slow 8s linear infinite;
}
@keyframes spin-slow { to { transform: rotate(360deg); } }
.avatar-inner {
  width: 100%; height: 100%; border-radius: 50%;
  background: var(--bg2);
  overflow: hidden;
  animation: spin-slow 8s linear infinite reverse;
}
.avatar-inner img {
  width: 100%; height: 100%;
  object-fit: cover; object-position: center top;
  border-radius: 50%;
  display: block;
}
.floating-badge {
  position: absolute;
  background: var(--bg3);
  border: 1px solid var(--border-h);
  border-radius: 30px;
  padding: 8px 16px;
  font-size: 0.8rem; font-weight: 600;
  color: var(--accent);
  white-space: nowrap;
  box-shadow: var(--glow);
}
.badge-1 { top: 5%; right: -5%; animation: badge-float 3s ease-in-out infinite; }
.badge-2 { bottom: 20%; right: -10%; animation: badge-float 3.5s ease-in-out infinite 0.5s; }
.badge-3 { bottom: 5%; left: -5%; animation: badge-float 4s ease-in-out infinite 1s; }
@keyframes badge-float { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-8px)} }

.about-text h3 { font-size: 1.6rem; font-weight: 700; margin-bottom: 18px; }
.about-text p { color: var(--text2); margin-bottom: 16px; }
.about-text p strong { color: var(--text); }
.about-tags { display: flex; flex-wrap: wrap; gap: 10px; margin: 20px 0; }
.about-tags span {
  padding: 6px 16px; border-radius: 30px;
  border: 1px solid var(--border-h);
  font-size: 0.8rem; font-weight: 500; color: var(--accent);
  background: rgba(0,212,255,0.06);
  transition: all var(--tr);
}
.about-tags span:hover { background: rgba(0,212,255,0.15); transform: translateY(-2px); }
.stats-row {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 16px; margin-top: 24px;
}
.stat-box {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 12px; text-align: center;
  transition: all var(--tr);
}
.stat-box:hover {
  border-color: var(--border-h);
  box-shadow: var(--glow);
  transform: translateY(-4px);
}
.stat-box .count {
  font-size: 2rem; font-weight: 800;
  background: var(--grad);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
  font-family: 'JetBrains Mono', monospace;
}
.stat-box sup { color: var(--accent); font-size: 1rem; font-weight: 700; }
.stat-box p { font-size: 0.75rem; color: var(--text2); margin-top: 4px; }

/* ===== SKILLS ===== */
#skills { background: var(--bg2); }
.skill-tabs {
  display: flex; justify-content: center;
  gap: 12px; margin-bottom: 48px; flex-wrap: wrap;
}
.tab-btn {
  padding: 9px 24px; border-radius: 30px;
  border: 1.5px solid var(--border);
  font-size: 0.875rem; font-weight: 600;
  color: var(--text2);
  transition: all var(--tr);
}
.tab-btn:hover { border-color: var(--accent); color: var(--accent); }
.tab-btn.active {
  background: var(--grad); border-color: transparent;
  color: #fff;
  box-shadow: 0 0 20px rgba(0,212,255,0.3);
}
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 24px;
}
.skill-card {
  position: relative; overflow: hidden;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: all var(--tr);
}
.skill-card:hover {
  border-color: var(--border-h);
  transform: translateY(-6px);
  box-shadow: var(--glow);
}
.skill-card-glow {
  position: absolute; inset: 0;
  background: radial-gradient(circle at 50% 0%, rgba(0,212,255,0.08), transparent 70%);
  opacity: 0; transition: opacity var(--tr);
}
.skill-card:hover .skill-card-glow { opacity: 1; }
.skill-icon-wrap {
  width: 48px; height: 48px; border-radius: 12px;
  background: rgba(0,212,255,0.1);
  border: 1px solid rgba(0,212,255,0.2);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem; color: var(--accent);
  margin-bottom: 16px;
  transition: all var(--tr);
}
.skill-card:hover .skill-icon-wrap {
  background: rgba(0,212,255,0.2);
  box-shadow: var(--glow);
}
.skill-card h4 { font-size: 1rem; font-weight: 700; margin-bottom: 4px; }
.skill-card p { font-size: 0.8rem; color: var(--text2); margin-bottom: 16px; }
.skill-bar-wrap { display: flex; align-items: center; gap: 10px; }
.skill-bar {
  flex: 1; height: 5px; border-radius: 3px;
  background: rgba(255,255,255,0.08); overflow: hidden;
}
.skill-fill {
  height: 100%; width: 0;
  background: var(--grad); border-radius: 3px;
  transition: width 1.2s cubic-bezier(0.4, 0, 0.2, 1);
}
.skill-bar-wrap span { font-size: 0.75rem; color: var(--accent); font-weight: 600; font-family: 'JetBrains Mono', monospace; min-width: 30px; }
.skill-card.hidden { display: none; }

/* ===== EXPERIENCE ===== */
#experience { background: var(--bg); }
.timeline { position: relative; padding-left: 32px; }
.timeline::before {
  content: ''; position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), var(--accent2), transparent);
  border-radius: 1px;
}
.timeline-item { position: relative; margin-bottom: 48px; }
.timeline-dot {
  position: absolute; left: -38px; top: 24px;
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--accent);
  border: 3px solid var(--bg);
  box-shadow: var(--glow);
  z-index: 1;
}
.timeline-dot.pulse::after {
  content: ''; position: absolute;
  inset: -6px; border-radius: 50%;
  border: 2px solid var(--accent);
  animation: pulse-ring 2s ease-out infinite;
}
@keyframes pulse-ring { 0%{opacity:1;transform:scale(1)} 100%{opacity:0;transform:scale(2)} }

.timeline-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 32px;
  transition: all var(--tr);
}
.timeline-card:hover {
  border-color: var(--border-h);
  box-shadow: var(--glow);
}
.tl-top {
  display: flex; justify-content: space-between;
  align-items: flex-start; gap: 16px;
  margin-bottom: 20px; flex-wrap: wrap;
}
.tl-title-group h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 6px; }
.tl-company { font-size: 0.875rem; color: var(--accent); font-weight: 500; }
.tl-company em { color: var(--text2); font-style: normal; }
.tl-meta {
  display: flex; flex-direction: column;
  gap: 6px; align-items: flex-end;
}
.tl-meta span {
  font-size: 0.8rem; color: var(--text2);
  display: flex; align-items: center; gap: 6px;
}
.tl-meta i { color: var(--accent); }
.badge-current {
  padding: 3px 10px; border-radius: 20px;
  background: rgba(0,212,255,0.15);
  border: 1px solid rgba(0,212,255,0.35);
  color: var(--accent);
  font-size: 0.72rem; font-weight: 600;
  letter-spacing: 0.05em;
}
.tl-bullets { padding-left: 20px; margin-bottom: 20px; }
.tl-bullets li {
  color: var(--text2); font-size: 0.9rem;
  margin-bottom: 8px; position: relative;
}
.tl-bullets li::before {
  content: '▸'; position: absolute; left: -16px; color: var(--accent);
}
.tl-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.tl-tags span {
  padding: 4px 12px; border-radius: 20px;
  border: 1px solid var(--border);
  font-size: 0.75rem; font-weight: 500;
  color: var(--text2);
  background: rgba(255,255,255,0.03);
  transition: all var(--tr);
}
.tl-tags span:hover { border-color: var(--accent); color: var(--accent); }

/* ===== EDUCATION ===== */
#education { background: var(--bg2); }
.edu-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px; margin-bottom: 60px;
}
.edu-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  display: flex; gap: 20px;
  transition: all var(--tr);
}
.edu-card:hover {
  border-color: var(--border-h);
  transform: translateY(-5px);
  box-shadow: var(--glow);
}
.edu-icon {
  width: 52px; height: 52px; border-radius: 14px;
  background: rgba(0,212,255,0.1);
  border: 1px solid rgba(0,212,255,0.2);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem; color: var(--accent);
  flex-shrink: 0;
}
.edu-info h3 { font-size: 1rem; font-weight: 700; margin-bottom: 6px; }
.edu-school { display: block; font-size: 0.82rem; color: var(--accent); font-weight: 500; margin-bottom: 4px; }
.edu-year { display: block; font-size: 0.78rem; color: var(--text3); margin-bottom: 10px; font-family: 'JetBrains Mono', monospace; }
.edu-info p { font-size: 0.82rem; color: var(--text2); }
.sub-heading {
  text-align: center; font-size: 1.6rem; font-weight: 700;
  margin-bottom: 32px;
}
.cert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}
.cert-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 22px;
  display: flex; align-items: center; gap: 14px;
  transition: all var(--tr);
}
.cert-card:hover {
  border-color: var(--border-h);
  transform: translateX(4px);
  box-shadow: var(--glow);
}
.cert-icon { font-size: 1.3rem; color: var(--accent); flex-shrink: 0; }
.cert-card span { font-size: 0.875rem; font-weight: 500; color: var(--text2); }

/* ===== CONTACT ===== */
#contact { background: var(--bg); }
.contact-grid {
  display: grid; grid-template-columns: 1fr 1.2fr;
  gap: 60px; align-items: flex-start;
}
.contact-left h3 {
  font-size: 1.8rem; font-weight: 800;
  margin-bottom: 16px; line-height: 1.3;
}
.contact-left p { color: var(--text2); margin-bottom: 36px; }
.contact-links { display: flex; flex-direction: column; gap: 16px; }
.contact-link-item {
  display: flex; align-items: center; gap: 16px;
  padding: 16px 20px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all var(--tr);
}
.contact-link-item:hover {
  border-color: var(--border-h);
  transform: translateX(6px);
  box-shadow: var(--glow);
}
.cl-icon {
  width: 44px; height: 44px; border-radius: 12px;
  background: rgba(0,212,255,0.1);
  border: 1px solid rgba(0,212,255,0.2);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; color: var(--accent);
  flex-shrink: 0;
}
.cl-text span { display: block; font-size: 0.75rem; color: var(--text2); margin-bottom: 2px; }
.cl-text p { font-size: 0.875rem; font-weight: 600; color: var(--text); }

/* Form */
.contact-right { position: relative; }
#contactForm { display: flex; flex-direction: column; gap: 24px; }
.field-group { position: relative; }
.field-group input,
.field-group textarea {
  width: 100%;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px 16px 10px;
  color: var(--text);
  font-size: 0.95rem;
  font-family: inherit;
  transition: all var(--tr);
  resize: none;
}
.field-group input:focus,
.field-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0,212,255,0.1);
}
.field-group label {
  position: absolute; left: 16px; top: 14px;
  font-size: 0.875rem; color: var(--text2);
  transition: all var(--tr); pointer-events: none;
}
.field-group input:focus ~ label,
.field-group input:not(:placeholder-shown) ~ label,
.field-group textarea:focus ~ label,
.field-group textarea:not(:placeholder-shown) ~ label {
  top: 5px; font-size: 0.7rem; color: var(--accent);
}
.field-group input::placeholder,
.field-group textarea::placeholder { color: transparent; }
.field-line {
  position: absolute; bottom: 0; left: 16px; right: 16px;
  height: 2px; background: var(--grad);
  transform: scaleX(0); transition: transform var(--tr);
  border-radius: 0 0 2px 2px;
}
.field-group input:focus ~ .field-line,
.field-group textarea:focus ~ .field-line { transform: scaleX(1); }

.form-toast {
  display: none; align-items: center; gap: 12px;
  margin-top: 16px; padding: 16px 20px;
  background: rgba(0,212,255,0.1);
  border: 1px solid rgba(0,212,255,0.3);
  border-radius: 12px; color: var(--accent);
  font-size: 0.9rem; font-weight: 500;
}
.form-toast.show { display: flex; }
.form-toast i { font-size: 1.1rem; }

/* ===== FOOTER ===== */
footer {
  background: var(--bg2);
  border-top: 1px solid var(--border);
  padding: 32px 0;
}
.footer-inner {
  max-width: 1140px; margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 16px;
}
footer p { font-size: 0.875rem; color: var(--text2); }
.footer-socials { display: flex; gap: 16px; }
.footer-socials a {
  width: 38px; height: 38px; border-radius: 50%;
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  color: var(--text2); font-size: 1rem;
  transition: all var(--tr);
}
.footer-socials a:hover {
  border-color: var(--accent); color: var(--accent);
  box-shadow: var(--glow);
}

/* ===== BACK TO TOP ===== */
.back-top {
  position: fixed; bottom: 28px; right: 28px;
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--grad);
  color: #fff; font-size: 0.9rem;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 20px rgba(0,212,255,0.35);
  opacity: 0; pointer-events: none;
  transition: all var(--tr);
  z-index: 500;
}
.back-top.show { opacity: 1; pointer-events: all; }
.back-top:hover { transform: translateY(-3px); box-shadow: 0 8px 25px rgba(0,212,255,0.5); }

/* ===== PRELOADER ===== */
#preloader {
  position: fixed; inset: 0; z-index: 99999;
  background: #020612;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 20px;
  overflow: hidden;
}
.pre-logo {
  font-family: 'JetBrains Mono', monospace;
  font-size: 4rem; font-weight: 900;
  color: #fff; letter-spacing: -0.02em;
  opacity: 0;
  animation: pre-logo-in 0.6s 0.3s forwards ease-out;
  text-shadow: 0 0 60px rgba(0,212,255,0.6);
}
.pre-logo span { color: var(--accent); }
@keyframes pre-logo-in {
  from { opacity:0; transform: scale(0.8) translateY(20px); }
  to   { opacity:1; transform: scale(1) translateY(0); }
}
.pre-bar-wrap {
  width: 200px; height: 2px;
  background: rgba(255,255,255,0.1); border-radius: 2px;
  overflow: hidden;
  opacity: 0; animation: pre-logo-in 0.4s 0.6s forwards;
}
.pre-bar {
  height: 100%; width: 0%;
  background: var(--grad); border-radius: 2px;
  transition: width 0.05s linear;
  box-shadow: 0 0 12px var(--accent);
}
.pre-count {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem; color: var(--text2);
  letter-spacing: 0.2em;
  opacity: 0; animation: pre-logo-in 0.4s 0.7s forwards;
}
.pre-curtain {
  position: absolute; left: 0; right: 0; height: 50%;
  background: #020612; z-index: 2;
  transition: transform 0.8s cubic-bezier(0.77,0,0.18,1);
}
.pre-top { top: 0; transform: translateY(0); }
.pre-bot { bottom: 0; transform: translateY(0); }
.pre-curtain.open-top { transform: translateY(-100%); }
.pre-curtain.open-bot { transform: translateY(100%); }
#preloader.hide { pointer-events: none; }

/* ===== FILM GRAIN ===== */
#filmGrain {
  position: fixed; inset: 0;
  width: 100%; height: 100%;
  pointer-events: none; z-index: 9991;
  opacity: 0.035; mix-blend-mode: overlay;
}

/* ===== SPOTLIGHT ===== */
.spotlight {
  position: fixed;
  width: 500px; height: 500px; border-radius: 50%;
  background: radial-gradient(circle, rgba(0,212,255,0.05) 0%, transparent 65%);
  pointer-events: none; z-index: 1;
  transform: translate(-50%,-50%);
  transition: left 0.15s ease, top 0.15s ease;
}

/* ===== LETTER ANIMATION ===== */
.hero-name { opacity: 1; transform: none; }
.letter {
  display: inline-block;
  opacity: 0; transform: translateY(60px);
  transition: opacity 0.5s ease, transform 0.5s cubic-bezier(0.175,0.885,0.32,1.275);
}
.letter.in { opacity: 1; transform: translateY(0); }

/* ===== GLITCH EFFECT ===== */
.glitch-target { position: relative; }
.glitch-target::before,
.glitch-target::after {
  content: attr(data-text);
  position: absolute; top: 0; left: 0;
  background: var(--grad);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
  opacity: 0;
}
.glitch-target.glitching::before {
  opacity: 0.8;
  animation: glitch-before 0.15s steps(1) forwards;
}
.glitch-target.glitching::after {
  opacity: 0.8;
  animation: glitch-after 0.15s steps(1) forwards;
}
@keyframes glitch-before {
  0%  { clip-path: polygon(0 15%,100% 15%,100% 30%,0 30%); transform: translateX(-4px); }
  33% { clip-path: polygon(0 55%,100% 55%,100% 70%,0 70%); transform: translateX(4px); }
  66% { clip-path: polygon(0 75%,100% 75%,100% 85%,0 85%); transform: translateX(-2px); }
  100%{ clip-path: none; opacity: 0; }
}
@keyframes glitch-after {
  0%  { clip-path: polygon(0 40%,100% 40%,100% 55%,0 55%); transform: translateX(4px); filter: hue-rotate(90deg); }
  33% { clip-path: polygon(0 5%,100% 5%,100% 20%,0 20%); transform: translateX(-4px); }
  66% { clip-path: polygon(0 80%,100% 80%,100% 95%,0 95%); transform: translateX(2px); }
  100%{ clip-path: none; opacity: 0; }
}

/* ===== 3D TILT ===== */
.skill-card, .timeline-card, .edu-card, .cert-card {
  transform-style: preserve-3d;
  will-change: transform;
}
.tilt-shine {
  position: absolute; inset: 0; border-radius: inherit;
  background: radial-gradient(circle at var(--mx,50%) var(--my,50%), rgba(255,255,255,0.08), transparent 60%);
  pointer-events: none; opacity: 0; transition: opacity 0.3s;
}
.skill-card:hover .tilt-shine,
.timeline-card:hover .tilt-shine,
.edu-card:hover .tilt-shine { opacity: 1; }

/* ===== MAGNETIC BUTTON ===== */
.btn { transition: transform 0.3s cubic-bezier(0.23,1,0.32,1), box-shadow 0.3s, background 0.3s; }

/* ===== SECTION SWEEP ===== */
.section-header { overflow: hidden; }
.sweep-line {
  position: absolute; top: 0; left: -100%; width: 60%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(0,212,255,0.06), transparent);
  pointer-events: none;
}
.section-header.swept .sweep-line {
  animation: sweep 0.8s ease forwards;
}
@keyframes sweep { to { left: 120%; } }

/* ===== TIMELINE DRAW ===== */
.timeline::before {
  height: 0 !important;
  transition: height 1.5s ease !important;
}
.timeline.draw::before { height: 100% !important; }

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  .about-grid { grid-template-columns: 1fr; text-align: center; }
  .about-image-wrap { justify-content: center; margin-bottom: 20px; }
  .about-tags { justify-content: center; }
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .tl-top { flex-direction: column; }
  .tl-meta { align-items: flex-start; }
}
@media (max-width: 768px) {
  .nav-links {
    display: none; flex-direction: column;
    position: absolute; top: 100%; left: 0; right: 0;
    background: rgba(5,10,24,0.97);
    backdrop-filter: blur(20px);
    padding: 24px; gap: 20px;
    border-bottom: 1px solid var(--border);
  }
  .nav-links.open { display: flex; }
  .hamburger { display: flex; }
  .hero-buttons { flex-direction: column; align-items: center; }
  .timeline { padding-left: 20px; }
  .timeline-dot { left: -26px; }
  .timeline-card { padding: 20px; }
  section { padding: 70px 0; }
  .floating-badge { display: none; }
}
@media (max-width: 480px) {
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .skills-grid { grid-template-columns: 1fr 1fr; }
  .edu-grid { grid-template-columns: 1fr; }
}