/* Header styles for Social Vibe Evening */

.sve-header {
  position: sticky;
  top: 0;
  z-index: 60;
  backdrop-filter: blur(22px) saturate(160%);
  -webkit-backdrop-filter: blur(22px) saturate(160%);
  background: linear-gradient(90deg, rgba(5, 5, 10, 0.94), rgba(5, 5, 10, 0.88));
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.sve-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-3);
  padding-bottom: var(--space-3);
  gap: var(--space-4);
}

/* Branding */

.sve-header__branding {
  display: flex;
  align-items: center;
}

.sve-header__logo-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
}

.sve-header__logo-mark {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 0, rgba(240, 210, 122, 0.7), transparent 55%),
              radial-gradient(circle at 80% 80%, rgba(184, 115, 255, 0.9), transparent 55%),
              #05050a;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 16px rgba(184, 115, 255, 0.55);
  position: relative;
  overflow: hidden;
}

.sve-header__logo-chip {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.8);
  box-shadow: inset 0 0 0 2px rgba(5, 5, 10, 0.9);
}

.sve-header__brand-text {
  display: flex;
  flex-direction: column;
}

.sve-header__brand-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.sve-header__brand-subtitle {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

/* Navigation */

.sve-header__nav {
  display: flex;
  align-items: center;
}

.sve-header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  list-style: none;
  margin: 0;
  padding: 0;
}

.sve-header__nav-link {
  position: relative;
  font-size: var(--font-size-sm);
  color: var(--color-text-soft);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  padding: 0.3rem 0;
}

.sve-header__nav-link::after {
  height: 2px;
  bottom: -4px;
}

.sve-header__nav-link:hover,
.sve-header__nav-link:focus-visible {
  color: var(--color-text);
}

.sve-header__nav-item--cta .sve-header__nav-link--cta {
  padding: 0.45rem 1.3rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(240, 210, 122, 0.6);
  background: linear-gradient(135deg, rgba(184, 115, 255, 0.2), rgba(240, 210, 122, 0.14));
  box-shadow: 0 0 18px rgba(184, 115, 255, 0.4);
}

.sve-header__nav-item--cta .sve-header__nav-link--cta::after {
  display: none;
}

.sve-header__nav-item--cta .sve-header__nav-link--cta:hover,
.sve-header__nav-item--cta .sve-header__nav-link--cta:focus-visible {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent-gold));
  color: #05050a;
  box-shadow: var(--shadow-glow-gold);
}

/* Mobile menu toggle */

.sve-header__menu-toggle {
  display: none;
  align-items: center;
  gap: var(--space-2);
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(5, 5, 10, 0.9);
  color: var(--color-text-soft);
  cursor: pointer;
}

.sve-header__menu-toggle-box {
  position: relative;
  width: 20px;
  height: 16px;
}

.sve-header__menu-toggle-line {
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent-gold));
  transition: transform var(--transition-base), opacity var(--transition-base), top var(--transition-base), bottom var(--transition-base);
}

.sve-header__menu-toggle-line:first-child {
  top: 3px;
}

.sve-header__menu-toggle-line:last-child {
  bottom: 3px;
}

.sve-header__menu-toggle-label {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.16em;
}

/* Open state */

.sve-header--menu-open .sve-header__menu-toggle-line:first-child {
  top: 7px;
  transform: rotate(45deg);
}

.sve-header--menu-open .sve-header__menu-toggle-line:last-child {
  bottom: 7px;
  transform: rotate(-45deg);
}

/* Responsive behavior */

@media (max-width: 768px) {
  .sve-header__inner {
    padding-top: var(--space-2);
    padding-bottom: var(--space-2);
  }

  .sve-header__menu-toggle {
    display: inline-flex;
  }

  .sve-header__nav {
    position: absolute;
    inset-inline: 0;
    top: 100%;
    background: radial-gradient(circle at 0 0, rgba(184, 115, 255, 0.2), transparent 60%),
                radial-gradient(circle at 100% 0, rgba(240, 210, 122, 0.16), transparent 60%),
                rgba(5, 5, 10, 0.98);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transition: max-height var(--transition-slow), opacity var(--transition-base), visibility var(--transition-base);
  }

  .sve-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-4);
    gap: var(--space-3);
  }

  .sve-header__nav-item--cta {
    width: 100%;
  }

  .sve-header__nav-item--cta .sve-header__nav-link--cta {
    display: inline-flex;
    width: 100%;
    justify-content: center;
    text-align: center;
  }

  .sve-header--menu-open .sve-header__nav {
    max-height: 320px;
    opacity: 1;
    visibility: visible;
  }
}

@media (max-width: 520px) {
  .sve-header__brand-subtitle {
    display: none;
  }
}