@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --bg: #050b18;
  --bg2: #0d1424;
  --surface: #111827;
  --glass: rgba(255,255,255,0.04);
  --glass-border: rgba(255,255,255,0.08);
  --primary: #6366f1;
  --primary-glow: rgba(99,102,241,0.3);
  --cyan: #22d3ee;
  --cyan-glow: rgba(34,211,238,0.2);
  --text: #f1f5f9;
  --muted: #94a3b8;
  --subtle: #334155;
  --gradient: linear-gradient(135deg, #6366f1, #22d3ee);
  --card-hover: rgba(99,102,241,0.08);
  --radius: 16px;
  --radius-sm: 8px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: 'Inter', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

/* SCROLLBAR */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg2); }
::-webkit-scrollbar-thumb { background: var(--primary); border-radius: 3px; }

/* SELECTION */
::selection { background: var(--primary-glow); color: var(--text); }

/* NAV */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  padding: 0 2rem;
  height: 70px;
  display: flex; align-items: center; justify-content: space-between;
  background: rgba(5,11,24,0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  transition: all 0.3s ease;
}

nav.scrolled { background: rgba(5,11,24,0.95); }

.nav-logo {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.1rem; font-weight: 600;
  background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  text-decoration: none;
}

.nav-links { display: flex; gap: 2rem; list-style: none; }
.nav-links a {
  color: var(--muted); text-decoration: none; font-size: 0.9rem; font-weight: 500;
  transition: color 0.3s; position: relative;
}
.nav-links a::after {
  content: ''; position: absolute; bottom: -4px; left: 0; width: 0; height: 2px;
  background: var(--gradient); border-radius: 2px; transition: width 0.3s;
}
.nav-links a:hover, .nav-links a.active { color: var(--text); }
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }

.nav-cta {
  padding: 0.5rem 1.25rem;
  background: var(--gradient); border: none; border-radius: 50px;
  color: #fff; font-size: 0.85rem; font-weight: 600;
  cursor: pointer; text-decoration: none; transition: opacity 0.3s, transform 0.3s;
}
.nav-cta:hover { opacity: 0.85; transform: translateY(-1px); }

.menu-btn {
  display: none; flex-direction: column; gap: 5px; cursor: pointer; background: none; border: none;
}
.menu-btn span {
  display: block; width: 24px; height: 2px; background: var(--text);
  border-radius: 2px; transition: all 0.3s;
}

/* HERO */
#hero {
  min-height: 100vh; position: relative;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}

#canvas { position: absolute; inset: 0; z-index: 0; }

.hero-content {
  position: relative; z-index: 1;
  text-align: center; padding: 2rem;
  max-width: 900px;
}

.hero-badge {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.4rem 1rem;
  background: var(--glass); border: 1px solid var(--glass-border);
  border-radius: 50px; font-size: 0.8rem; color: var(--cyan);
  margin-bottom: 1.5rem; font-family: 'JetBrains Mono', monospace;
  animation: fadeDown 0.6s ease 0.2s both;
}

.hero-badge::before {
  content: ''; width: 8px; height: 8px; border-radius: 50%;
  background: var(--cyan); box-shadow: 0 0 8px var(--cyan);
  animation: pulse 2s infinite;
}

@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:0.4} }

h1.hero-name {
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: 900; line-height: 1.1;
  margin-bottom: 0.5rem;
  animation: fadeUp 0.7s ease 0.4s both;
}

.hero-name span {
  background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}

.hero-title {
  font-size: clamp(1rem, 2.5vw, 1.4rem);
  color: var(--muted); font-weight: 400; margin-bottom: 1.5rem;
  min-height: 2em;
  animation: fadeUp 0.7s ease 0.6s both;
}

.typed-cursor {
  display: inline-block; width: 2px; height: 1.2em;
  background: var(--cyan); vertical-align: middle;
  animation: blink 1s infinite;
}
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0} }

.hero-bio {
  font-size: 1rem; color: var(--muted); max-width: 600px;
  margin: 0 auto 2rem; line-height: 1.8;
  animation: fadeUp 0.7s ease 0.8s both;
}

.hero-btns {
  display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap;
  animation: fadeUp 0.7s ease 1s both;
}

.btn-primary {
  padding: 0.8rem 2rem; background: var(--gradient);
  color: #fff; text-decoration: none; border-radius: 50px;
  font-weight: 600; font-size: 0.95rem;
  transition: transform 0.3s, box-shadow 0.3s;
  box-shadow: 0 4px 20px var(--primary-glow);
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 8px 30px var(--primary-glow); }

.btn-outline {
  padding: 0.8rem 2rem;
  border: 1px solid var(--glass-border); color: var(--text);
  text-decoration: none; border-radius: 50px;
  font-weight: 500; font-size: 0.95rem;
  background: var(--glass); backdrop-filter: blur(10px);
  transition: border-color 0.3s, background 0.3s, transform 0.3s;
}
.btn-outline:hover { border-color: var(--primary); background: var(--card-hover); transform: translateY(-3px); }

.hero-socials {
  display: flex; gap: 1.5rem; justify-content: center; margin-top: 2.5rem;
  animation: fadeUp 0.7s ease 1.2s both;
}
.hero-socials a {
  color: var(--muted); text-decoration: none; font-size: 0.85rem;
  display: flex; align-items: center; gap: 0.4rem;
  transition: color 0.3s, transform 0.3s;
}
.hero-socials a:hover { color: var(--cyan); transform: translateY(-2px); }

.scroll-indicator {
  position: absolute; bottom: 2rem; left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 0.5rem;
  color: var(--muted); font-size: 0.75rem; animation: fadeUp 1s ease 1.5s both;
}
.scroll-line {
  width: 1px; height: 40px; background: linear-gradient(to bottom, var(--primary), transparent);
  animation: scrollAnim 2s ease infinite;
}
@keyframes scrollAnim { 0%{transform:scaleY(0);transform-origin:top} 50%{transform:scaleY(1);transform-origin:top} 51%{transform:scaleY(1);transform-origin:bottom} 100%{transform:scaleY(0);transform-origin:bottom} }

/* SECTIONS */
section { padding: 6rem 2rem; position: relative; }
.container { max-width: 1100px; margin: 0 auto; }

.section-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem; color: var(--cyan); letter-spacing: 0.15em;
  text-transform: uppercase; margin-bottom: 0.75rem;
  display: flex; align-items: center; gap: 0.75rem;
}
.section-label::before { content: '//'; opacity: 0.5; }

h2.section-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem); font-weight: 800;
  line-height: 1.2; margin-bottom: 1rem;
}
h2.section-title span { background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }

.section-divider {
  width: 60px; height: 3px; background: var(--gradient);
  border-radius: 3px; margin-bottom: 3rem;
}

/* ABOUT */
#about { background: var(--bg2); }

.about-grid {
  display: grid; grid-template-columns: 1fr 1.6fr; gap: 4rem; align-items: start;
}

.about-avatar-wrap { position: relative; display: flex; justify-content: center; }

.about-avatar {
  width: 260px; height: 260px; border-radius: 24px;
  background: var(--gradient);
  display: flex; align-items: center; justify-content: center;
  font-size: 4rem; font-weight: 800; color: rgba(255,255,255,0.9);
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: -2px;
  position: relative; overflow: hidden;
  box-shadow: 0 20px 60px var(--primary-glow);
}
.about-avatar img {
  width: 100%; height: 100%; object-fit: cover; border-radius: 24px;
}
.about-avatar::after {
  content: ''; position: absolute; inset: -2px; border-radius: 26px;
  background: var(--gradient); z-index: -1; opacity: 0.5; filter: blur(15px);
}

.about-tags { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 1.5rem; justify-content: center; }
.about-tag {
  padding: 0.35rem 0.85rem;
  background: var(--glass); border: 1px solid var(--glass-border);
  border-radius: 50px; font-size: 0.8rem; color: var(--muted);
  font-family: 'JetBrains Mono', monospace;
}

.about-text p { color: var(--muted); line-height: 1.9; margin-bottom: 1.25rem; font-size: 0.97rem; }

.pillars { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 1rem; margin-top: 2rem; }
.pillar {
  padding: 1.25rem;
  background: var(--glass); border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  transition: border-color 0.3s, transform 0.3s;
}
.pillar:hover { border-color: var(--primary); transform: translateY(-3px); }
.pillar-icon {
  width: 40px; height: 40px; border-radius: 10px;
  background: rgba(99,102,241,0.12); border: 1px solid rgba(99,102,241,0.2);
  display: flex; align-items: center; justify-content: center;
  color: var(--primary); margin-bottom: 0.75rem;
}
.pillar h4 { font-size: 0.85rem; font-weight: 600; margin-bottom: 0.25rem; }
.pillar p { font-size: 0.78rem; color: var(--muted); line-height: 1.5; }

/* SKILLS */
.skills-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 1.5rem; }

.skill-card {
  background: var(--glass); border: 1px solid var(--glass-border);
  border-radius: var(--radius); padding: 1.75rem;
  transition: border-color 0.3s, transform 0.3s, background 0.3s;
}
.skill-card:hover { border-color: var(--primary); background: var(--card-hover); transform: translateY(-4px); }

.skill-card-header { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 1.25rem; }
.skill-icon {
  width: 36px; height: 36px; border-radius: 8px;
  background: var(--gradient);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.75rem; font-weight: 700; color: #fff;
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: -0.5px; flex-shrink: 0;
}
.skill-card h3 { font-size: 1rem; font-weight: 700; }

.skill-tags { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.skill-tag {
  padding: 0.3rem 0.75rem;
  background: rgba(99,102,241,0.1); border: 1px solid rgba(99,102,241,0.2);
  border-radius: 50px; font-size: 0.8rem; color: var(--primary);
  font-family: 'JetBrains Mono', monospace; font-weight: 500;
  transition: background 0.3s, border-color 0.3s;
}
.skill-tag:hover { background: rgba(99,102,241,0.2); border-color: var(--primary); }
.skill-tag.cyan {
  background: rgba(34,211,238,0.1); border-color: rgba(34,211,238,0.2); color: var(--cyan);
}
.skill-tag.cyan:hover { background: rgba(34,211,238,0.2); border-color: var(--cyan); }

/* PROJECTS */
#projects { background: var(--bg2); }

.projects-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 1.5rem; }

.project-card {
  background: var(--glass); border: 1px solid var(--glass-border);
  border-radius: var(--radius); padding: 2rem;
  display: flex; flex-direction: column;
  transition: border-color 0.3s, transform 0.4s, background 0.3s;
  position: relative; overflow: hidden;
}
.project-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: var(--gradient); opacity: 0; transition: opacity 0.3s;
}
.project-card:hover { border-color: rgba(99,102,241,0.4); background: var(--card-hover); transform: translateY(-6px); }
.project-card:hover::before { opacity: 1; }

.project-card.featured { border-color: rgba(99,102,241,0.3); grid-column: span 2; }
.project-card.featured::before { opacity: 1; }

.project-header { display: flex; align-items: flex-start; justify-content: space-between; margin-bottom: 1rem; }
.project-icon {
  width: 44px; height: 44px; border-radius: 12px;
  background: var(--gradient);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.85rem; font-weight: 700; color: #fff;
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: -0.5px; flex-shrink: 0;
}
.project-icon-img {
  background: none; padding: 0; overflow: hidden;
}
.project-icon-img img {
  width: 100%; height: 100%; object-fit: cover; border-radius: 12px;
}
.project-links { display: flex; gap: 0.5rem; }
.project-link {
  padding: 0.35rem 0.85rem;
  border: 1px solid var(--glass-border); border-radius: 50px;
  font-size: 0.75rem; color: var(--muted); text-decoration: none;
  transition: border-color 0.3s, color 0.3s;
}
.project-link:hover { border-color: var(--cyan); color: var(--cyan); }

.project-badge {
  display: inline-block; padding: 0.25rem 0.75rem;
  background: rgba(99,102,241,0.15); border: 1px solid var(--primary);
  border-radius: 50px; font-size: 0.7rem; color: var(--primary);
  font-weight: 600; margin-bottom: 0.75rem; text-transform: uppercase; letter-spacing: 0.08em;
}

.project-card h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 0.5rem; }
.project-card p { font-size: 0.9rem; color: var(--muted); line-height: 1.7; flex: 1; }

.project-highlights { margin: 1rem 0; list-style: none; }
.project-highlights li {
  font-size: 0.85rem; color: var(--muted); padding: 0.2rem 0;
  display: flex; align-items: flex-start; gap: 0.5rem;
}
.project-highlights li::before { content: '▸'; color: var(--cyan); flex-shrink: 0; margin-top: 0.1em; }

.project-tech { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: 1.25rem; }
.tech-badge {
  padding: 0.25rem 0.65rem;
  background: var(--surface); border: 1px solid var(--subtle);
  border-radius: 50px; font-size: 0.75rem; color: var(--muted);
  font-family: 'JetBrains Mono', monospace;
}

/* RESEARCH */
.research-card {
  background: var(--glass); border: 1px solid var(--glass-border);
  border-radius: var(--radius); padding: 2.5rem;
  position: relative; overflow: hidden;
}
.research-card::before {
  content: ''; position: absolute; top: 0; left: 0; bottom: 0; width: 3px;
  background: var(--gradient);
}

.research-header { display: flex; align-items: flex-start; justify-content: space-between; gap: 2rem; flex-wrap: wrap; margin-bottom: 1.5rem; }
.research-title { font-size: 1.2rem; font-weight: 700; margin-bottom: 0.5rem; }
.research-role {
  display: inline-block; padding: 0.3rem 1rem;
  background: rgba(34,211,238,0.1); border: 1px solid rgba(34,211,238,0.3);
  border-radius: 50px; font-size: 0.8rem; color: var(--cyan); font-weight: 600;
}
.research-org {
  display: flex; align-items: center; gap: 0.75rem;
  background: var(--surface); border-radius: var(--radius-sm); padding: 1rem 1.5rem;
  text-align: center; flex-shrink: 0;
}
.research-org .org-name { font-size: 1rem; font-weight: 800; color: var(--primary); }
.research-org .org-sub { font-size: 0.75rem; color: var(--muted); }
.research-body p { font-size: 0.92rem; color: var(--muted); line-height: 1.8; }

.research-tags { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 1.25rem; }
.research-tag {
  padding: 0.3rem 0.75rem; background: var(--glass); border: 1px solid var(--glass-border);
  border-radius: 50px; font-size: 0.78rem; color: var(--muted);
}

/* EDUCATION */
.education-timeline { position: relative; padding-left: 2rem; }
.education-timeline::before {
  content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 2px;
  background: linear-gradient(to bottom, var(--primary), var(--cyan), transparent);
}

.edu-item { position: relative; padding-left: 2rem; padding-bottom: 2.5rem; }
.edu-item::before {
  content: ''; position: absolute; left: -2.45rem; top: 0.25rem;
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--gradient); box-shadow: 0 0 12px var(--primary-glow);
}

.edu-card {
  background: var(--glass); border: 1px solid var(--glass-border);
  border-radius: var(--radius); padding: 1.75rem;
  transition: border-color 0.3s, transform 0.3s;
}
.edu-card:hover { border-color: var(--primary); transform: translateX(4px); }

.edu-header { display: flex; justify-content: space-between; align-items: flex-start; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 0.75rem; }
.edu-school { font-size: 1.05rem; font-weight: 700; }
.edu-period {
  font-size: 0.8rem; color: var(--cyan); font-family: 'JetBrains Mono', monospace;
  background: rgba(34,211,238,0.08); border: 1px solid rgba(34,211,238,0.2);
  padding: 0.2rem 0.65rem; border-radius: 50px;
}
.edu-dept { font-size: 0.9rem; color: var(--primary); font-weight: 500; margin-bottom: 0.5rem; }
.edu-location { font-size: 0.85rem; color: var(--muted); margin-bottom: 0.75rem; }
.edu-detail { font-size: 0.88rem; color: var(--muted); line-height: 1.7; }
.edu-detail strong { color: var(--text); }

/* CONTACT */
#contact { background: var(--bg2); }

.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; align-items: start; }

.contact-info h3 { font-size: 1.4rem; font-weight: 700; margin-bottom: 0.75rem; }
.contact-info p { font-size: 0.95rem; color: var(--muted); line-height: 1.8; margin-bottom: 2rem; }

.contact-links { display: flex; flex-direction: column; gap: 1rem; }
.contact-link {
  display: flex; align-items: center; gap: 1rem;
  padding: 1rem 1.25rem;
  background: var(--glass); border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm); text-decoration: none;
  color: var(--text); transition: border-color 0.3s, transform 0.3s;
}
.contact-link:hover { border-color: var(--primary); transform: translateX(4px); }
.contact-link-icon {
  width: 40px; height: 40px; border-radius: 10px;
  background: rgba(99,102,241,0.12); border: 1px solid rgba(99,102,241,0.2);
  display: flex; align-items: center; justify-content: center;
  color: var(--primary); flex-shrink: 0;
}
.contact-link-info small { font-size: 0.75rem; color: var(--muted); display: block; }
.contact-link-info span { font-size: 0.9rem; font-weight: 500; }

.contact-form { display: flex; flex-direction: column; gap: 1rem; }
.form-group { display: flex; flex-direction: column; gap: 0.4rem; }
.form-group label { font-size: 0.85rem; color: var(--muted); font-weight: 500; }
.form-group input, .form-group textarea {
  padding: 0.85rem 1rem;
  background: var(--glass); border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm); color: var(--text);
  font-family: 'Inter', sans-serif; font-size: 0.9rem;
  transition: border-color 0.3s, background 0.3s; outline: none;
}
.form-group input:focus, .form-group textarea:focus { border-color: var(--primary); background: var(--card-hover); }
.form-group textarea { resize: vertical; min-height: 130px; }
.form-submit {
  padding: 0.9rem 2rem; background: var(--gradient);
  border: none; border-radius: 50px; color: #fff;
  font-weight: 600; font-size: 0.95rem; cursor: pointer;
  transition: opacity 0.3s, transform 0.3s; width: 100%;
  box-shadow: 0 4px 20px var(--primary-glow);
}
.form-submit:hover { opacity: 0.85; transform: translateY(-2px); }

/* FOOTER */
footer {
  background: var(--bg); border-top: 1px solid var(--glass-border);
  padding: 2rem; text-align: center;
  color: var(--muted); font-size: 0.85rem;
}
footer span { background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; font-weight: 600; }

/* ANIMATIONS */
@keyframes fadeUp { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeDown { from { opacity: 0; transform: translateY(-20px); } to { opacity: 1; transform: translateY(0); } }

.reveal { opacity: 0; transform: translateY(40px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-left { opacity: 0; transform: translateX(-40px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal-left.visible { opacity: 1; transform: translateX(0); }
.reveal-right { opacity: 0; transform: translateX(40px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal-right.visible { opacity: 1; transform: translateX(0); }

.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }

/* MOBILE MENU */
.mobile-menu {
  display: none; position: fixed; inset: 0; z-index: 999;
  background: rgba(5,11,24,0.97); backdrop-filter: blur(20px);
  flex-direction: column; align-items: center; justify-content: center; gap: 2.5rem;
}
.mobile-menu.open { display: flex; }
.mobile-menu a { font-size: 1.5rem; color: var(--text); text-decoration: none; font-weight: 600; }
.mobile-menu a:hover { color: var(--cyan); }
.close-btn {
  position: absolute; top: 1.5rem; right: 2rem;
  background: none; border: none; color: var(--text); font-size: 1.5rem; cursor: pointer;
}

/* RESPONSIVE */
@media (max-width: 900px) {
  .about-grid { grid-template-columns: 1fr; text-align: center; }
  .about-avatar-wrap { justify-content: center; }
  .pillars { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .project-card.featured { grid-column: span 1; }
  .nav-links, .nav-cta { display: none; }
  .menu-btn { display: flex; }
}
@media (max-width: 600px) {
  section { padding: 4rem 1.25rem; }
  .hero-btns { flex-direction: column; align-items: center; }
}