/* ===== CSS VARIABLES ===== */
:root {
  --bg-primary: #0A0A0F;
  --bg-secondary: #111118;
  --accent-blue: #00D4FF;
  --accent-purple: #7B2FFF;
  --accent-green: #00FF88;
  --text-primary: #FFFFFF;
  --text-secondary: #A0A0B0;
  --glass-bg: rgba(255,255,255,0.05);
  --glass-border: rgba(255,255,255,0.10);
  --font-heading: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
}

/* ===== RESET ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  overflow-x: hidden;
  line-height: 1.6;
}
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
button { cursor: pointer; border: none; outline: none; font-family: var(--font-body); }
h1,h2,h3,h4,h5,h6 { font-family: var(--font-heading); line-height: 1.2; }
::selection { background: var(--accent-purple); color: #fff; }

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--accent-blue), var(--accent-purple));
  border-radius: 4px;
}

/* ===== PRELOADER ===== */
#preloader {
  position: fixed; inset: 0; z-index: 9999;
  background: var(--bg-primary);
  display: flex; align-items: center; justify-content: center;
  flex-direction: column; gap: 24px;
  transition: opacity 0.6s, visibility 0.6s;
}
#preloader.hidden { opacity: 0; visibility: hidden; }
.preloader-logo {
  font-family: var(--font-heading); font-size: 3rem; font-weight: 700;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple), var(--accent-green));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  animation: pulse-glow 1.5s ease-in-out infinite;
}
.preloader-bar { width: 200px; height: 3px; background: var(--glass-bg); border-radius: 4px; overflow: hidden; }
.preloader-bar-inner {
  height: 100%; width: 0;
  background: linear-gradient(90deg, var(--accent-blue), var(--accent-purple), var(--accent-green));
  border-radius: 4px;
  animation: load-bar 2s ease-in-out forwards;
}
@keyframes load-bar { to { width: 100%; } }
@keyframes pulse-glow { 0%,100% { opacity: 1; } 50% { opacity: 0.5; } }

/* ===== PARTICLE CANVAS ===== */
#particles-canvas {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
}

/* ===== CURSOR GLOW ===== */
.cursor-glow {
  position: fixed; width: 400px; height: 400px; border-radius: 50%;
  background: radial-gradient(circle, rgba(0,212,255,0.06) 0%, transparent 70%);
  pointer-events: none; z-index: 1; transform: translate(-50%,-50%);
  transition: left 0.3s ease, top 0.3s ease;
}

/* ===== NAVBAR ===== */
.navbar {
  position: fixed; top: 0; left: 0; width: 100%; z-index: 1000;
  padding: 16px 48px;
  display: flex; align-items: center; justify-content: space-between;
  transition: background 0.3s, backdrop-filter 0.3s, box-shadow 0.3s;
}
.navbar.scrolled {
  background: rgba(10,10,15,0.8);
  backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 var(--glass-border);
}
.nav-logo {
  font-family: var(--font-heading); font-size: 1.5rem; font-weight: 700;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.nav-links { display: flex; gap: 32px; align-items: center; }
.nav-links a {
  font-size: 0.9rem; color: var(--text-secondary);
  position: relative; transition: color 0.3s;
}
.nav-links a:hover { color: var(--text-primary); }
.nav-links a::after {
  content: ''; position: absolute; bottom: -4px; left: 0;
  width: 0; height: 2px; border-radius: 1px;
  background: linear-gradient(90deg, var(--accent-blue), var(--accent-purple));
  transition: width 0.3s;
}
.nav-links a:hover::after { width: 100%; }
.hamburger { display: none; flex-direction: column; gap: 5px; background: none; padding: 4px; }
.hamburger span {
  width: 24px; height: 2px; background: var(--text-primary);
  border-radius: 2px; transition: 0.3s;
}
.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }
.mobile-menu {
  display: none; position: fixed; top: 0; right: -100%; width: 280px; height: 100vh;
  background: rgba(17,17,24,0.95); backdrop-filter: blur(20px);
  flex-direction: column; padding: 80px 40px; gap: 24px;
  transition: right 0.4s cubic-bezier(0.4,0,0.2,1);
  z-index: 999; border-left: 1px solid var(--glass-border);
}
.mobile-menu.open { right: 0; }
.mobile-menu a { font-size: 1.1rem; color: var(--text-secondary); transition: color 0.3s; }
.mobile-menu a:hover { color: var(--accent-blue); }

/* ===== SECTION COMMON ===== */
section { position: relative; z-index: 2; padding: 100px 48px; max-width: 1200px; margin: 0 auto; }
.section-label {
  font-size: 0.85rem; text-transform: uppercase; letter-spacing: 3px;
  color: var(--accent-blue); margin-bottom: 12px;
}
.section-title {
  font-size: 2.5rem; font-weight: 700; margin-bottom: 16px;
  background: linear-gradient(135deg, var(--text-primary), var(--text-secondary));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.section-subtitle { color: var(--text-secondary); font-size: 1.05rem; max-width: 600px; margin-bottom: 48px; }

/* ===== HERO ===== */
.hero {
  min-height: 100vh; display: flex; align-items: center;
  justify-content: space-between; gap: 40px;
  padding-top: 100px; position: relative;
}
.hero-content { max-width: 600px; flex-shrink: 0; }
.hero-greeting { font-size: 1.2rem; color: var(--accent-green); margin-bottom: 12px; }
.hero-name {
  font-size: clamp(2.5rem, 6vw, 4.5rem); font-weight: 800; margin-bottom: 8px;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple), var(--accent-green));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-size: 200% 200%; animation: gradient-shift 4s ease infinite;
}
@keyframes gradient-shift { 0%,100% { background-position: 0% 50%; } 50% { background-position: 100% 50%; } }
.hero-tagline { font-size: clamp(1.2rem, 3vw, 1.8rem); color: var(--text-secondary); margin-bottom: 8px; min-height: 2em; }
.hero-tagline .typed-cursor { color: var(--accent-blue); animation: blink 0.7s infinite; }
@keyframes blink { 0%,100% { opacity: 1; } 50% { opacity: 0; } }
.hero-desc { color: var(--text-secondary); margin-bottom: 32px; font-size: 1rem; max-width: 540px; }
.hero-ctas { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 32px; }
.btn-primary {
  padding: 14px 32px; border-radius: 50px; font-weight: 600; font-size: 0.95rem;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
  color: #fff; transition: transform 0.3s, box-shadow 0.3s;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0,212,255,0.3);
}
.btn-outline {
  padding: 14px 32px; border-radius: 50px; font-weight: 600; font-size: 0.95rem;
  background: transparent; color: var(--text-primary);
  border: 1px solid var(--glass-border); transition: all 0.3s;
}
.btn-outline:hover {
  border-color: var(--accent-purple);
  box-shadow: 0 0 20px rgba(123,47,255,0.2);
  transform: translateY(-2px);
}
.hero-socials { display: flex; gap: 16px; }
.hero-socials a {
  width: 44px; height: 44px; border-radius: 12px;
  background: var(--glass-bg); border: 1px solid var(--glass-border);
  display: flex; align-items: center; justify-content: center;
  transition: all 0.3s; color: var(--text-secondary); font-size: 1.2rem;
}
.hero-socials a:hover {
  color: var(--accent-blue); border-color: var(--accent-blue);
  box-shadow: 0 0 20px rgba(0,212,255,0.15);
  transform: translateY(-3px);
}

/* Hero Image */
.hero-image-wrap {
  position: relative; flex-shrink: 0;
  width: 380px;
}
.hero-image-glow {
  position: absolute; inset: -30px;
  background: radial-gradient(circle at 50% 60%, rgba(123,47,255,0.18) 0%, rgba(0,212,255,0.10) 40%, transparent 70%);
  border-radius: 50%; filter: blur(50px);
  animation: glow-pulse 4s ease-in-out infinite;
}
@keyframes glow-pulse { 0%,100% { opacity: 0.6; transform: scale(1); } 50% { opacity: 1; transform: scale(1.05); } }
.hero-image-border {
  position: relative; z-index: 2;
}
.hero-image {
  width: 100%; height: auto;
  display: block;
  filter: drop-shadow(0 10px 40px rgba(0,212,255,0.12)) drop-shadow(0 4px 20px rgba(123,47,255,0.10));
}
.hero-float-icon {
  position: absolute; z-index: 3;
  width: 48px; height: 48px; border-radius: 14px;
  background: rgba(17,17,24,0.9); border: 1px solid var(--glass-border);
  backdrop-filter: blur(10px);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem; color: var(--accent-blue);
  animation: float-icon 5s ease-in-out infinite;
  box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}
.hero-float-icon:nth-child(3) { animation-delay: 0s; color: var(--accent-blue); }
.hero-float-icon:nth-child(4) { animation-delay: 1s; color: #68a063; }
.hero-float-icon:nth-child(5) { animation-delay: 2s; color: #f7df1e; }
.hero-float-icon:nth-child(6) { animation-delay: 3s; color: var(--accent-green); }
.hero-float-icon:nth-child(7) { animation-delay: 4s; color: var(--accent-purple); }
@keyframes float-icon {
  0%,100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

/* ===== ABOUT ===== */
.about-grid { display: grid; grid-template-columns: 1fr 1.5fr; gap: 60px; align-items: center; }
.about-image-wrap {
  position: relative; width: 280px; height: 280px; margin: 0 auto;
}
.about-image-wrap::before {
  content: ''; position: absolute; inset: -4px; border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple), var(--accent-green));
  animation: gradient-shift 4s ease infinite; background-size: 200% 200%;
}
.about-image {
  width: 100%; height: 100%; border-radius: 50%;
  background: var(--bg-secondary);
  display: flex; align-items: center; justify-content: center;
  font-size: 5rem; position: relative; z-index: 1;
  border: 4px solid var(--bg-primary);
}
.about-tags { display: flex; flex-wrap: wrap; gap: 10px; margin: 20px 0; }
.about-tag {
  padding: 6px 16px; border-radius: 20px; font-size: 0.8rem;
  background: var(--glass-bg); border: 1px solid var(--glass-border);
  color: var(--accent-blue);
}
.about-stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; margin-top: 32px; }
.stat-card {
  padding: 20px; border-radius: 16px;
  background: var(--glass-bg); border: 1px solid var(--glass-border);
  text-align: center;
}
.stat-number {
  font-family: var(--font-heading); font-size: 2rem; font-weight: 700;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.stat-label { font-size: 0.8rem; color: var(--text-secondary); margin-top: 4px; }

/* ===== SKILLS ===== */
.skills-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; }
.skill-category {
  padding: 32px; border-radius: 20px;
  background: var(--glass-bg); border: 1px solid var(--glass-border);
  transition: transform 0.3s, box-shadow 0.3s;
}
.skill-category:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 40px rgba(0,212,255,0.08);
}
.skill-cat-title {
  font-size: 1.1rem; font-weight: 600; margin-bottom: 24px;
  display: flex; align-items: center; gap: 10px;
}
.skill-cat-icon { font-size: 1.4rem; }
.skill-item { margin-bottom: 18px; }
.skill-info { display: flex; justify-content: space-between; margin-bottom: 6px; font-size: 0.85rem; }
.skill-name { color: var(--text-primary); }
.skill-percent { color: var(--accent-blue); }
.skill-bar { height: 6px; border-radius: 3px; background: rgba(255,255,255,0.08); overflow: hidden; }
.skill-bar-fill {
  height: 100%; border-radius: 3px; width: 0;
  background: linear-gradient(90deg, var(--accent-blue), var(--accent-purple));
  transition: width 1.5s cubic-bezier(0.4,0,0.2,1);
}

/* ===== PROJECTS ===== */
.project-filters { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 40px; }
.filter-btn {
  padding: 8px 20px; border-radius: 20px; font-size: 0.85rem;
  background: var(--glass-bg); border: 1px solid var(--glass-border);
  color: var(--text-secondary); transition: all 0.3s;
}
.filter-btn.active, .filter-btn:hover {
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
  color: #fff; border-color: transparent;
}
.projects-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); gap: 24px; }
.project-card {
  border-radius: 20px; overflow: hidden;
  background: var(--glass-bg); border: 1px solid var(--glass-border);
  transition: transform 0.4s, box-shadow 0.4s;
  position: relative;
}
.project-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 60px rgba(0,212,255,0.1);
}
.project-card.coming-soon { opacity: 0.7; }
.project-card.coming-soon .project-thumb::after {
  content: '🚀 Coming Soon'; position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  background: rgba(10,10,15,0.8); font-size: 1.2rem; font-weight: 600;
  color: var(--accent-green);
}
.project-thumb {
  height: 200px; background: var(--bg-secondary); position: relative;
  overflow: hidden;
  background-size: cover; background-position: center;
}
.project-thumb img { width: 100%; height: 100%; object-fit: cover; }
.project-body { padding: 24px; }
.project-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 12px; }
.project-tag {
  padding: 3px 10px; border-radius: 12px; font-size: 0.7rem;
  background: rgba(0,212,255,0.1); color: var(--accent-blue);
}
.project-title { font-size: 1.2rem; font-weight: 600; margin-bottom: 8px; }
.project-desc { font-size: 0.85rem; color: var(--text-secondary); margin-bottom: 16px; line-height: 1.5; }
.project-links { display: flex; gap: 12px; }
.project-link {
  padding: 8px 18px; border-radius: 12px; font-size: 0.8rem; font-weight: 500;
  display: flex; align-items: center; gap: 6px; transition: all 0.3s;
}
.project-link.demo {
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
  color: #fff;
}
.project-link.github {
  background: var(--glass-bg); border: 1px solid var(--glass-border);
  color: var(--text-secondary);
}
.project-link:hover { transform: translateY(-2px); }

/* ===== TIMELINE ===== */
.timeline { position: relative; padding-left: 40px; }
.timeline::before {
  content: ''; position: absolute; left: 15px; top: 0; bottom: 0;
  width: 2px; background: linear-gradient(180deg, var(--accent-blue), var(--accent-purple), var(--accent-green));
}
.timeline-item { position: relative; margin-bottom: 48px; }
.timeline-dot {
  position: absolute; left: -33px; top: 4px; width: 14px; height: 14px;
  border-radius: 50%; border: 3px solid var(--accent-blue);
  background: var(--bg-primary);
}
.timeline-card {
  padding: 24px; border-radius: 16px;
  background: var(--glass-bg); border: 1px solid var(--glass-border);
}
.timeline-date { font-size: 0.8rem; color: var(--accent-blue); margin-bottom: 4px; }
.timeline-role { font-size: 1.1rem; font-weight: 600; margin-bottom: 4px; }
.timeline-company { font-size: 0.9rem; color: var(--accent-purple); margin-bottom: 12px; }
.timeline-list { font-size: 0.85rem; color: var(--text-secondary); }
.timeline-list li { margin-bottom: 6px; padding-left: 16px; position: relative; }
.timeline-list li::before { content: '▹'; position: absolute; left: 0; color: var(--accent-green); }

/* ===== EDUCATION ===== */
.edu-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 24px; }
.edu-card {
  padding: 32px; border-radius: 20px;
  background: var(--glass-bg); border: 1px solid var(--glass-border);
  transition: transform 0.3s;
}
.edu-card:hover { transform: translateY(-4px); }
.edu-icon { font-size: 2rem; margin-bottom: 16px; }
.edu-degree { font-size: 1.1rem; font-weight: 600; margin-bottom: 4px; }
.edu-school { font-size: 0.9rem; color: var(--accent-blue); margin-bottom: 4px; }
.edu-year { font-size: 0.8rem; color: var(--text-secondary); margin-bottom: 4px; }
.edu-grade { font-size: 0.8rem; color: var(--accent-green); }

/* ===== CONTACT ===== */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 60px; }
.contact-info-item {
  display: flex; align-items: center; gap: 16px; margin-bottom: 24px;
  padding: 16px; border-radius: 12px;
  background: var(--glass-bg); border: 1px solid var(--glass-border);
}
.contact-icon {
  width: 44px; height: 44px; border-radius: 12px;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem; flex-shrink: 0;
}
.contact-label { font-size: 0.8rem; color: var(--text-secondary); }
.contact-value { font-size: 0.95rem; }
.availability-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 16px; border-radius: 20px; font-size: 0.85rem;
  background: rgba(0,255,136,0.1); color: var(--accent-green);
  margin-top: 16px;
}
.availability-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent-green);
  animation: pulse-dot 2s infinite;
}
@keyframes pulse-dot { 0%,100% { opacity: 1; } 50% { opacity: 0.3; } }
.contact-form { display: flex; flex-direction: column; gap: 16px; }
.form-group { position: relative; }
.form-group input, .form-group textarea {
  width: 100%; padding: 14px 18px; border-radius: 12px;
  background: var(--glass-bg); border: 1px solid var(--glass-border);
  color: var(--text-primary); font-family: var(--font-body); font-size: 0.9rem;
  transition: border-color 0.3s;
}
.form-group input:focus, .form-group textarea:focus {
  outline: none; border-color: var(--accent-blue);
}
.form-group textarea { min-height: 140px; resize: vertical; }
.form-group input::placeholder, .form-group textarea::placeholder { color: var(--text-secondary); }
.btn-submit {
  padding: 14px 40px; border-radius: 50px; font-weight: 600; font-size: 0.95rem;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
  color: #fff; transition: all 0.3s; align-self: flex-start;
}
.btn-submit:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(0,212,255,0.3); }
.contact-socials { display: flex; gap: 12px; margin-top: 24px; }
.contact-socials a {
  width: 40px; height: 40px; border-radius: 10px;
  background: var(--glass-bg); border: 1px solid var(--glass-border);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-secondary); transition: all 0.3s;
}
.contact-socials a:hover { color: var(--accent-blue); border-color: var(--accent-blue); transform: translateY(-2px); }

/* ===== FOOTER ===== */
.footer {
  padding: 40px 48px; border-top: 1px solid var(--glass-border);
  text-align: center; position: relative; z-index: 2;
}
.footer-content { max-width: 1200px; margin: 0 auto; }
.footer-links { display: flex; justify-content: center; gap: 24px; margin-bottom: 16px; flex-wrap: wrap; }
.footer-links a { font-size: 0.85rem; color: var(--text-secondary); transition: color 0.3s; }
.footer-links a:hover { color: var(--accent-blue); }
.footer-copy { font-size: 0.8rem; color: var(--text-secondary); }
.footer-copy span { color: #ff4444; }

/* ===== BACK TO TOP ===== */
.back-to-top {
  position: fixed; bottom: 30px; right: 30px; width: 48px; height: 48px;
  border-radius: 14px; z-index: 999;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 1.2rem;
  opacity: 0; visibility: hidden; transform: translateY(20px);
  transition: all 0.3s;
}
.back-to-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { transform: translateY(-3px); box-shadow: 0 8px 25px rgba(0,212,255,0.3); }

/* ===== TOAST ===== */
.toast {
  position: fixed; bottom: 30px; left: 50%; transform: translateX(-50%) translateY(100px);
  padding: 14px 28px; border-radius: 12px;
  background: var(--accent-green); color: var(--bg-primary); font-weight: 600; font-size: 0.9rem;
  z-index: 9999; opacity: 0; transition: all 0.4s;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  section { padding: 60px 20px; }
  .navbar { padding: 14px 20px; }
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .mobile-menu { display: flex; }
  .hero { padding-top: 80px; flex-direction: column; text-align: center; }
  .hero-content { max-width: 100%; }
  .hero-name { font-size: 2.2rem; }
  .hero-desc { margin-left: auto; margin-right: auto; }
  .hero-ctas { justify-content: center; }
  .hero-socials { justify-content: center; }
  .hero-image-wrap { width: 260px; margin: 0 auto; order: -1; }
  .hero-float-icon { display: none; }
  .about-grid { grid-template-columns: 1fr; text-align: center; }
  .about-stats { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: 1fr; }
  .section-title { font-size: 2rem; }
  .footer { padding: 30px 20px; }
}
@media (max-width: 480px) {
  .hero-ctas { flex-direction: column; }
  .about-stats { grid-template-columns: 1fr; }
  .about-image-wrap { width: 200px; height: 200px; }
}