@import url('https://fonts.googleapis.com/css2?family=Syne:wght@400;500;600;700;800&family=DM+Sans:ital,wght@0,300;0,400;0,500;1,300&display=swap');

:root {
  --bg: #080a0f;
  --bg2: #0d1117;
  --surface: #111620;
  --surface2: #1a2133;
  --border: rgba(99, 160, 255, 0.1);
  --accent: #4f8ef7;
  --accent2: #7c3aed;
  --accent-glow: rgba(79, 142, 247, 0.25);
  --gold: #f0b429;
  --text: #e8edf5;
  --text-muted: #8896aa;
  --text-dim: #4a5568;
  --radius: 12px;
  --radius-lg: 20px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'DM Sans', sans-serif;
  font-weight: 300;
  line-height: 1.7;
  overflow-x: hidden;
}

/* ─── SCROLLBAR ─── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--surface2); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* ─── SELECTION ─── */
::selection { background: var(--accent); color: #fff; }

/* ─── TYPOGRAPHY ─── */
h1, h2, h3, h4, h5 { font-family: 'Syne', sans-serif; font-weight: 700; line-height: 1.2; }

a { color: var(--accent); text-decoration: none; transition: var(--transition); }
a:hover { color: #fff; }

/* ─── NAV ─── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 0 2rem;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(8, 10, 15, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}

.nav-brand {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 1.2rem;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  letter-spacing: -0.5px;
}

.nav-brand span {
  color: var(--accent);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
}

.nav-links a {
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 400;
  padding: 0.4rem 0.75rem;
  border-radius: 6px;
  letter-spacing: 0.3px;
  transition: var(--transition);
}

.nav-links a:hover, .nav-links a.active {
  color: #fff;
  background: rgba(79, 142, 247, 0.1);
}

.nav-links a.nav-cv {
  color: var(--accent);
  border: 1px solid rgba(79, 142, 247, 0.3);
  padding: 0.35rem 1rem;
}

.nav-links a.nav-cv:hover {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.4rem 0.6rem;
  border-radius: 6px;
  cursor: pointer;
  font-size: 1.1rem;
}

@media (max-width: 768px) {
  .nav-toggle { display: flex; align-items: center; }
  .nav-links {
    display: none;
    position: absolute;
    top: 64px; left: 0; right: 0;
    background: rgba(8, 10, 15, 0.97);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 1rem;
    border-bottom: 1px solid var(--border);
    gap: 0.1rem;
  }
  .nav-links.open { display: flex; }
  .nav-links a { width: 100%; padding: 0.65rem 1rem; }
}

/* ─── PAGE HEADER ─── */
.page-header {
  padding: 8rem 2rem 3rem;
  text-align: center;
  position: relative;
}

.page-header::before {
  content: '';
  position: absolute;
  top: 0; left: 50%; transform: translateX(-50%);
  width: 600px; height: 400px;
  background: radial-gradient(ellipse, rgba(79,142,247,0.08) 0%, transparent 70%);
  pointer-events: none;
}

.page-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
  font-family: 'DM Sans', sans-serif;
}

.page-title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  letter-spacing: -2px;
  color: #fff;
  margin-bottom: 0.5rem;
}

.page-divider {
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  margin: 1.5rem auto;
  border-radius: 2px;
}

/* ─── SECTION CONTAINER ─── */
.section {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 2rem 5rem;
}

/* ─── CARDS ─── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
  position: relative;
}

.card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(79,142,247,0.04), transparent);
  opacity: 0;
  transition: var(--transition);
}

.card:hover {
  border-color: rgba(79, 142, 247, 0.3);
  transform: translateY(-4px);
  box-shadow: 0 20px 60px rgba(0,0,0,0.4), 0 0 0 1px rgba(79,142,247,0.1);
}

.card:hover::before { opacity: 1; }

/* ─── GRID ─── */
.grid-3 { display: grid; grid-template-columns: repeat(3,1fr); gap: 1.5rem; }
.grid-2 { display: grid; grid-template-columns: repeat(2,1fr); gap: 1.5rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4,1fr); gap: 1.25rem; }

@media (max-width: 1024px) { .grid-3 { grid-template-columns: repeat(2,1fr); } .grid-4 { grid-template-columns: repeat(2,1fr); } }
@media (max-width: 640px) { .grid-3, .grid-2, .grid-4 { grid-template-columns: 1fr; } }

/* ─── BADGE ─── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.72rem;
  font-weight: 500;
  padding: 0.25rem 0.6rem;
  border-radius: 20px;
  background: rgba(79,142,247,0.12);
  color: var(--accent);
  border: 1px solid rgba(79,142,247,0.2);
  letter-spacing: 0.3px;
}

.badge.gold { background: rgba(240,180,41,0.1); color: var(--gold); border-color: rgba(240,180,41,0.2); }
.badge.purple { background: rgba(124,58,237,0.12); color: #a78bfa; border-color: rgba(124,58,237,0.2); }

/* ─── BUTTONS ─── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 1.25rem;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 500;
  font-family: 'DM Sans', sans-serif;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover { background: #6ba3ff; color: #fff; box-shadow: 0 0 20px var(--accent-glow); }

.btn-outline {
  background: transparent;
  color: var(--accent);
  border: 1px solid rgba(79,142,247,0.35);
}
.btn-outline:hover { background: rgba(79,142,247,0.1); color: #fff; border-color: var(--accent); }

/* ─── FOOTER ─── */
.footer {
  background: var(--bg2);
  border-top: 1px solid var(--border);
  padding: 3rem 2rem;
  text-align: center;
}

.footer-socials {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.footer-social-link {
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text-muted);
  transition: var(--transition);
}

.footer-social-link:hover {
  color: var(--accent);
  border-color: rgba(79,142,247,0.4);
  background: rgba(79,142,247,0.08);
  transform: translateY(-2px);
}

.footer-copy {
  color: var(--text-dim);
  font-size: 0.82rem;
}

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

@keyframes glow {
  0%, 100% { box-shadow: 0 0 20px rgba(79,142,247,0.2); }
  50% { box-shadow: 0 0 40px rgba(79,142,247,0.4); }
}

.animate-fade-up {
  opacity: 0;
  animation: fadeUp 0.6s ease forwards;
}

.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }
.delay-5 { animation-delay: 0.5s; }

/* ─── TIMELINE ─── */
.timeline { position: relative; padding-left: 2rem; }
.timeline::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, var(--accent), var(--accent2), transparent);
}

.timeline-item {
  position: relative;
  margin-bottom: 3rem;
  padding-left: 1.5rem;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -0.45rem; top: 0.4rem;
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent-glow);
}

.timeline-year {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 0.35rem;
}

.timeline-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.2rem;
}

.timeline-subtitle {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.timeline-body { color: var(--text-muted); font-size: 0.9rem; }

/* ─── SKILL CHIP ─── */
.skill-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.skill-chip {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.9rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: var(--transition);
  cursor: default;
}

.skill-chip:hover {
  color: var(--text);
  border-color: rgba(79,142,247,0.3);
  background: rgba(79,142,247,0.06);
}

.skill-chip img { width: 20px; height: 20px; object-fit: contain; }


/* ─── 3D BACKGROUND CANVAS (subpages) ─── */
#bg-canvas {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: 0;
  pointer-events: none;
}

/* ─── Z-INDEX STACK: canvas(0) → sections(1) → cards(2) → links(3) ─── */
.nav, .page-header, .section, .footer,
.stats-section, .quicklinks-section, .profile-section {
  position: relative;
  z-index: 1;
}

.card,
.other-card,
.ql-card,
.connect-card,
.exp-card,
.pub-card,
.timeline-item,
.skill-group {
  position: relative;
  z-index: 2;
}

a, button, .btn, .icon-link, .badge,
.proj-footer, .proj-body,
.exp-footer, .exp-body,
.pub-body,
.other-card,
.connect-card {
  position: relative;
  z-index: 3;
  pointer-events: auto;
}

/* ─── NOISE OVERLAY ─── */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.025;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
}

/* ─── CURSOR GLOW ─── */
.cursor-glow {
  position: fixed;
  width: 400px; height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(79,142,247,0.06) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
  transform: translate(-50%, -50%);
  transition: left 0.1s, top 0.1s;
}