.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  border-radius: var(--radius-sm);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.03em;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
  min-height: 44px;
}
.btn span {
  position: relative;
  z-index: 2;
}
.btn::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: rgba(255,255,255,0.08);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.4s ease;
  z-index: 1;
}
.btn:hover::before {
  transform: scaleX(1);
  transform-origin: left;
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
  box-shadow: var(--glow-accent-sm);
}
.btn-primary:hover {
  background: var(--color-accent-light);
  box-shadow: var(--glow-accent);
}

.btn-outline {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255,255,255,0.25);
}
.btn-outline:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  box-shadow: var(--glow-accent-sm);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 100px;
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.divider-line {
  width: 60px;
  height: 3px;
  background: var(--color-accent);
  margin: 0 auto 24px;
  border-radius: 2px;
}

/* autofix: nav dark background on scroll */
#nav {
  transition: background 0.4s ease, box-shadow 0.4s ease, backdrop-filter 0.4s ease;
}
#nav.scrolled {
  background: rgba(10, 10, 18, 0.92);
  box-shadow: 0 2px 24px rgba(0,0,0,0.45);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

/* autofix: hamburger aligned with logo on mobile */
.nav-hamburger {
  align-items: center;
  align-self: center;
  flex-direction: column;
}