.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: rgba(11, 15, 26, 0.75);
  backdrop-filter: blur(14px);
  z-index: 10;
  border-bottom: 1px solid rgba(148, 163, 184, 0.1);
}

.nav {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo {
  font-weight: 700;
  font-size: 20px;
  letter-spacing: 1px;
  color: var(--accent);
  text-shadow: var(--glow);
}

.nav__list {
  list-style: none;
  display: flex;
  gap: 20px;
  align-items: center;
  flex-wrap: wrap;
  position: relative;
}

.nav__link {
  font-size: 14px;
  color: var(--muted);
  transition: color var(--transition);
  padding: 6px 8px;
  border-radius: 999px;
  position: relative;
  z-index: 1;
}

.nav__link::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(120deg, rgba(0, 229, 255, 0.22), rgba(124, 58, 237, 0.22));
  opacity: 0;
  transition: opacity var(--transition);
  z-index: -1;
}

.nav__link.active,
.nav__link:hover {
  color: var(--text);
}

.nav__link.active::before,
.nav__link:hover::before {
  opacity: 1;
}

.nav__indicator {
  position: absolute;
  top: 50%;
  left: 0;
  height: 28px;
  width: 0;
  border-radius: 999px;
  background: rgba(124, 58, 237, 0.2);
  transform: translate(var(--nav-indicator-x, 0px), -50%);
  transition: transform 260ms ease, width 260ms ease, opacity 200ms ease;
  z-index: 0;
  opacity: 0;
  pointer-events: none;
}

.nav__indicator.is-visible {
  opacity: 1;
}

.nav__link:focus-visible,
.nav__toggle:focus-visible,
.logo:focus-visible {
  outline: 2px solid rgba(0, 229, 255, 0.7);
  outline-offset: 2px;
}

.nav__toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 12px;
  padding: 8px 12px;
}

.card {
  padding: 24px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 600;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}

.btn--primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #030712;
  box-shadow: var(--glow);
}

.btn--primary:hover {
  transform: translateY(-2px);
}

.btn--ghost {
  border-color: var(--border);
  background: rgba(15, 23, 42, 0.4);
  color: var(--text);
}

.muted {
  color: var(--muted);
  font-size: 14px;
}

label {
  display: grid;
  gap: 6px;
  font-size: 14px;
  color: var(--muted);
}

input,
textarea {
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 14px;
  color: var(--text);
  font: inherit;
}

input:focus,
textarea:focus {
  outline: 2px solid rgba(0, 229, 255, 0.5);
}

.floating-actions {
  position: fixed;
  right: 24px;
  bottom: 32px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  z-index: 9;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
}

.floating-actions.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top,
.back-to-contact {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(10, 15, 28, 0.88);
  border: 1px solid rgba(0, 229, 255, 0.3);
  color: var(--accent);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.35), var(--nav-glow);
  transition: transform var(--transition), color var(--transition), border-color var(--transition);
}

.back-to-top:hover,
.back-to-contact:hover {
  color: var(--text);
  border-color: rgba(124, 58, 237, 0.6);
  transform: translateY(-2px);
}

.back-to-contact {
  color: var(--accent-2);
}