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

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background-color: #1a1a1a;
  color: #ffffff;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

a { text-decoration: none; }

.background-animation {
  position: fixed;
  inset: 0;
  z-index: 0;
  background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
}

.particle {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  opacity: 0.6;
}

/* ───── Navbar ───── */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
  height: 70px;
  background: rgba(13, 13, 18, 0.75);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.logo {
  font-family: 'Syne', sans-serif;
  font-size: 1.2rem;
  font-weight: 700;
  color: #fff;
  text-decoration: none;
  letter-spacing: -0.02em;
}
.logo span { color: #00d4ff; }

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

.nav-links a {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.55);
  text-decoration: none;
  padding: 0.35rem 0.75rem;
  border-radius: 6px;
  transition: color 0.2s, background 0.2s;
}
.nav-links a:hover {
  color: #fff;
  background: rgba(255,255,255,0.07);
}
.nav-links a.active {
  color: #00d4ff;
  background: rgba(0,212,255,0.08);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* CV button — desktop only */
.cv-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  font-weight: 500;
  color: #0d0d12;
  background: #00d4ff;
  border-radius: 6px;
  padding: 0.4rem 0.9rem;
  text-decoration: none;
  transition: opacity 0.2s, transform 0.15s;
}
.cv-btn:hover { opacity: 0.88; transform: translateY(-1px); }
.cv-btn svg { width: 13px; height: 13px; }

/* CV item inside mobile menu — hidden on desktop */
.cv-mobile-item { display: none; }

/* Hamburger — hidden on desktop */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.mobile-menu-toggle span {
  display: block;
  width: 20px;
  height: 1.5px;
  background: rgba(255,255,255,0.7);
  border-radius: 2px;
  transition: all 0.25s;
}
.mobile-menu-toggle.active span:nth-child(1) { transform: translateY(5.5px) rotate(45deg); }
.mobile-menu-toggle.active span:nth-child(2) { opacity: 0; }
.mobile-menu-toggle.active span:nth-child(3) { transform: translateY(-5.5px) rotate(-45deg); }

/* ───── Mobile ───── */
@media (max-width: 768px) {
  .navbar { padding: 0 1.25rem; }

  .mobile-menu-toggle { display: flex; }
  .cv-btn { display: none; }
  .cv-mobile-item { display: block; }

  .nav-links {
    display: none;
    position: absolute;
    top: 70px;
    left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    background: rgba(13, 13, 18, 0.97);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255,255,255,0.06);
    padding: 0.75rem 1.25rem 1rem;
    gap: 0;
  }
  .nav-links.active { display: flex; }

  .nav-links li {
    border-bottom: 1px solid rgba(255,255,255,0.05);
  }
  .nav-links li:last-child { border-bottom: none; }

  .nav-links a {
    display: block;
    padding: 0.75rem;
    font-size: 0.95rem;
    border-radius: 8px;
  }

  .cv-mobile-item a {
    display: inline-flex !important;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    margin-top: 0.5rem;
    padding: 0.65rem 1rem !important;
    background: linear-gradient(135deg, #00d4ff, #0099cc) !important;
    color: #fff !important;
    font-size: 0.9rem !important;
    font-weight: 600;
    border-radius: 8px;
  }
}

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

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}