* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
}

nav {
  position: fixed;
  top: 0;
  width: 100%;
  background: var(--nav-bg);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--nav-border);
  z-index: 100;
}
.nav-inner {
  max-width: 980px;
  margin: 0 auto;
  padding: 0 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 48px;
  position: relative;
}
.nav-logo {
  font-size: 17px;
  font-weight: 600;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.3px;
}
.nav-links {
  display: flex;
  gap: 28px;
  align-items: center;
}
.nav-links a {
  color: var(--text2);
  text-decoration: none;
  font-size: 13px;
  transition: color 0.3s;
  letter-spacing: 0.01em;
}
.nav-links a:hover { color: var(--text); }

.theme-toggle-btn {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid var(--card-border);
  background: transparent;
  color: var(--text2);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s;
}
.theme-toggle-btn:hover {
  color: var(--text);
  border-color: var(--accent);
  background: var(--card);
}

.bg-glow {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}
.glow-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.15;
  animation: float 20s ease-in-out infinite;
}
@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -30px) scale(1.05); }
  66% { transform: translate(-20px, 20px) scale(0.95); }
}

.hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  flex-direction: column;
  gap: 4px;
  padding: 4px;
  z-index: 101;
}
.hamburger span {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}
.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(4px, 4px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(4px, -4px); }
.menu-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 99;
}
.menu-overlay.show { display: block; }

@media (max-width: 640px) {
  .hamburger { display: flex; }
  .nav-links {
    display: none;
    position: fixed;
    top: 0;
    right: 0;
    width: 240px;
    height: 100vh;
    background: var(--mobile-nav-bg);
    backdrop-filter: blur(30px);
    border-left: 1px solid var(--mobile-nav-border);
    flex-direction: column;
    align-items: flex-start;
    padding: 64px 24px 24px;
    gap: 0;
    z-index: 100;
    animation: slideIn 0.3s ease;
  }
  @keyframes slideIn { from { transform: translateX(100%); } to { transform: translateX(0); } }
  .nav-links.open { display: flex; }
  .nav-links a {
    font-size: 15px;
    padding: 14px 0;
    width: 100%;
    border-bottom: 1px solid var(--card-border);
  }
}