/* STACKLURE Header Styles */

.sl-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(20px);
  background: linear-gradient(to bottom, rgba(5, 6, 10, 0.92), rgba(5, 6, 10, 0.9));
  border-bottom: 1px solid var(--color-border-subtle);
}

.sl-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);
}

/* Brand */
.sl-header__brand {
  display: flex;
  align-items: center;
  min-width: 0;
}

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

.sl-header__logo-mark {
  position: relative;
  width: 2.3rem;
  height: 2.3rem;
  border-radius: var(--radius-lg);
  background: radial-gradient(circle at 30% 20%, rgba(255, 182, 72, 0.4), transparent 55%),
              radial-gradient(circle at 80% 80%, rgba(46, 204, 113, 0.35), transparent 55%),
              #070814;
  border: 1px solid var(--color-border-strong);
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.sl-header__logo-chip {
  position: absolute;
  width: 0.7rem;
  height: 1.2rem;
  border-radius: 8px;
  background: var(--color-surface-soft);
  border: 1px solid var(--color-border-strong);
  box-shadow: 0 0 0 1px rgba(0,0,0,0.5);
}

.sl-header__logo-chip--left {
  left: 0.35rem;
  transform: rotate(-18deg);
  background: linear-gradient(145deg, var(--color-primary-soft), #141726);
}

.sl-header__logo-chip--right {
  right: 0.35rem;
  transform: rotate(18deg);
  background: linear-gradient(215deg, var(--color-success-soft), #141726);
}

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

.sl-header__brand-name {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.sl-header__brand-tagline {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  white-space: nowrap;
}

/* Navigation */
.sl-header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.sl-header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.sl-header__nav-link {
  position: relative;
  padding: 0.4rem 0.2rem;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.sl-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-success));
  transition: width var(--transition-normal);
}

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

.sl-header__nav-link:hover::after,
.sl-header__nav-link:focus-visible::after {
  width: 100%;
}

.sl-header__cta-wrap {
  margin-left: var(--space-4);
}

.sl-header__cta {
  font-size: var(--font-size-xs);
  white-space: nowrap;
}

/* Mobile toggle */
.sl-header__toggle {
  display: none;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.9rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border-subtle);
  background-color: rgba(5,6,10,0.8);
  color: var(--color-text);
}

.sl-header__toggle:hover {
  border-color: var(--color-primary);
}

.sl-header__toggle-text {
  font-size: var(--font-size-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.sl-header__toggle-icon {
  position: relative;
  width: 1.3rem;
  height: 1.1rem;
  display: inline-flex;
  flex-direction: column;
  justify-content: space-between;
}

.sl-header__toggle-icon span {
  display: block;
  height: 2px;
  border-radius: 999px;
  background-color: var(--color-text);
  transition: transform var(--transition-normal), opacity var(--transition-fast), width var(--transition-normal);
}

.sl-header__toggle[aria-expanded="true"] .sl-header__toggle-icon span:nth-child(1) {
  transform: translateY(4px) rotate(45deg);
}

.sl-header__toggle[aria-expanded="true"] .sl-header__toggle-icon span:nth-child(2) {
  opacity: 0;
}

.sl-header__toggle[aria-expanded="true"] .sl-header__toggle-icon span:nth-child(3) {
  transform: translateY(-4px) rotate(-45deg);
  width: 100%;
}

/* Responsive */
@media (max-width: 900px) {
  .sl-header__brand-tagline {
    display: none;
  }
}

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

  .sl-header__toggle {
    display: inline-flex;
  }

  .sl-header__nav {
    position: fixed;
    inset-inline: 0;
    top: 3.5rem;
    background: radial-gradient(circle at top, rgba(255, 182, 72, 0.08), transparent 55%),
                rgba(5,6,10,0.98);
    border-bottom: 1px solid var(--color-border-subtle);
    padding: var(--space-4) var(--space-4) var(--space-6);
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-4);
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transform: translateY(-6px);
    transition: max-height var(--transition-slow), opacity var(--transition-normal), transform var(--transition-normal);
  }

  .sl-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    width: 100%;
    gap: var(--space-2);
  }

  .sl-header__nav-link {
    font-size: var(--font-size-base);
  }

  .sl-header__cta-wrap {
    margin-left: 0;
    width: 100%;
  }

  .sl-header__cta {
    width: 100%;
    justify-content: center;
  }

  .sl-header__nav--open {
    max-height: 22rem;
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 480px) {
  .sl-header__brand-name {
    font-size: 0.95rem;
  }

  .sl-header__logo-mark {
    width: 2rem;
    height: 2rem;
  }
}