/* Header styles scoped to .sv-header */

.sv-header {
  position: sticky;
  top: 0;
  z-index: var(--z-overlay);
  backdrop-filter: blur(16px);
  background: linear-gradient(180deg, rgba(5, 6, 9, 0.96), rgba(5, 6, 9, 0.86));
  border-bottom: 1px solid var(--color-border-subtle);
  box-shadow: 0 18px 45px rgba(0, 0, 0, 0.85);
}

.sv-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-8);
  padding-bottom: var(--space-8);
  gap: var(--space-12);
}

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

.sv-header__logo-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-6);
}

.sv-header__logo-mark {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background:
    conic-gradient(from 210deg, var(--color-accent-cyan), var(--color-accent-green), var(--color-primary), var(--color-danger), var(--color-accent-cyan));
  position: relative;
  box-shadow: var(--shadow-glow-cyan);
}

.sv-header__logo-mark::after {
  content: "";
  position: absolute;
  inset: 3px;
  border-radius: 8px;
  background: radial-gradient(circle at 30% 0, rgba(255, 255, 255, 0.28), transparent 55%),
    radial-gradient(circle at 80% 100%, rgba(255, 122, 26, 0.55), transparent 60%),
    #050609;
}

.sv-header__logo-text {
  display: flex;
  flex-direction: column;
}

.sv-header__logo-main {
  font-family: var(--font-display);
  font-size: var(--font-size-lg);
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.sv-header__logo-sub {
  font-size: var(--font-size-xs);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-text-soft);
}

/* Navigation */

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

.sv-header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  list-style: none;
}

.sv-header__nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 0.4rem 0.1rem;
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--color-text-soft);
}

.sv-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.25rem;
  width: 0;
  height: 2px;
  border-radius: var(--radius-full);
  background: linear-gradient(90deg, var(--color-accent-cyan), var(--color-primary));
  box-shadow: var(--shadow-glow-cyan);
  transition: width var(--transition-med);
}

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

.sv-header__nav-link--cta {
  padding: 0.45rem 1.1rem;
  border-radius: 999px;
  border: 1px solid rgba(255, 122, 26, 0.7);
  background: radial-gradient(circle at 20% 0, rgba(255, 255, 255, 0.18), transparent 55%),
    linear-gradient(120deg, rgba(255, 122, 26, 0.8), rgba(5, 6, 9, 0.9));
  color: var(--gray-50);
  box-shadow: var(--shadow-glow-primary);
}

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

.sv-header__nav-item--cta {
  margin-left: var(--space-4);
}

/* Mobile toggle */
.sv-header__toggle {
  display: none;
  position: relative;
  width: 40px;
  height: 32px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border-strong);
  background: radial-gradient(circle at 0 0, rgba(24, 224, 255, 0.24), transparent 55%),
    #050609;
  cursor: pointer;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  gap: 5px;
}

.sv-header__toggle-bar {
  width: 60%;
  height: 2px;
  border-radius: var(--radius-full);
  background-color: var(--gray-100);
  transition: transform var(--transition-fast), opacity var(--transition-fast),
    width var(--transition-fast), background-color var(--transition-fast);
}

.sv-header__toggle:focus-visible {
  outline: 2px solid var(--color-accent-cyan);
  outline-offset: 3px;
}

/* Open state toggles */
.sv-header--menu-open .sv-header__toggle-bar:nth-child(1) {
  transform: translateY(4px) rotate(45deg);
}

.sv-header--menu-open .sv-header__toggle-bar:nth-child(2) {
  opacity: 0;
  width: 0;
}

.sv-header--menu-open .sv-header__toggle-bar:nth-child(3) {
  transform: translateY(-4px) rotate(-45deg);
}

/* Responsive layout */

@media (max-width: 960px) {
  .sv-header__inner {
    padding-top: var(--space-6);
    padding-bottom: var(--space-6);
  }

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

  .sv-header__nav {
    position: fixed;
    inset-inline: 0;
    top: 64px;
    background: radial-gradient(circle at top, rgba(24, 224, 255, 0.08), transparent 55%),
      linear-gradient(180deg, #050609, #050609);
    border-top: 1px solid var(--color-border-subtle);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--transition-med), opacity var(--transition-med);
  }

  .sv-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-12) var(--container-padding-x) var(--space-16);
  }

  .sv-header__nav-item--cta {
    margin-left: 0;
    margin-top: var(--space-4);
  }

  .sv-header--menu-open .sv-header__nav {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
}

@media (max-width: 640px) {
  .sv-header__logo-main {
    font-size: var(--font-size-md);
  }

  .sv-header__logo-sub {
    display: none;
  }
}