/* Header styles for Czech Venue Hub - builds on base.css */

.cvh-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(16px);
  background: linear-gradient(to bottom, rgba(247, 248, 251, 0.96), rgba(247, 248, 251, 0.86));
  border-bottom: 1px solid rgba(148, 163, 184, 0.25);
}

.cvh-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.75rem;
  padding-bottom: 0.75rem;
  gap: 1rem;
}

.cvh-header__brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--color-text);
}

.cvh-header__logo-mark {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: radial-gradient(circle at 20% 0, #ffffff, #e3e9f6);
  color: var(--color-primary);
  border: 1px solid rgba(15, 59, 130, 0.18);
  box-shadow: var(--shadow-sm);
}

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

.cvh-header__brand-title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.cvh-header__brand-subtitle {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

/* Navigation */

.cvh-header__nav {
  display: flex;
}

.cvh-header__nav-list {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  list-style: none;
}

.cvh-header__nav-link {
  position: relative;
  font-size: 0.9rem;
  color: var(--gray-700);
  padding: 0.25rem 0;
}

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

.cvh-header__nav-link--cta {
  padding: 0.4rem 0.9rem;
  border-radius: 999px;
  border: 1px solid rgba(15, 59, 130, 0.18);
  background: linear-gradient(135deg, var(--color-primary), #071b3d);
  color: #ffffff;
  box-shadow: var(--shadow-sm);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.cvh-header__nav-link--cta:hover,
.cvh-header__nav-link--cta:focus-visible {
  background: linear-gradient(135deg, var(--color-primary-hover), #050f26);
  box-shadow: var(--shadow-md);
}

/* Mobile menu toggle */

.cvh-header__menu-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.6);
  background-color: rgba(255, 255, 255, 0.85);
  cursor: pointer;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--gray-700);
}

.cvh-header__menu-toggle:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.cvh-header__menu-toggle-box {
  position: relative;
  width: 1.2rem;
  height: 1rem;
}

.cvh-header__menu-toggle-line {
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  border-radius: 999px;
  background-color: var(--gray-800);
  transition: transform var(--transition-base), opacity var(--transition-base), top var(--transition-base), bottom var(--transition-base);
}

.cvh-header__menu-toggle-line--top {
  top: 0;
}

.cvh-header__menu-toggle-line--middle {
  top: 50%;
  transform: translateY(-50%);
}

.cvh-header__menu-toggle-line--bottom {
  bottom: 0;
}

.cvh-header__menu-toggle-label {
  font-size: 0.7rem;
}

/* Mobile nav panel */

.cvh-header--nav-open .cvh-header__menu-toggle-line--top {
  top: 50%;
  transform: translateY(-50%) rotate(45deg);
}

.cvh-header--nav-open .cvh-header__menu-toggle-line--middle {
  opacity: 0;
}

.cvh-header--nav-open .cvh-header__menu-toggle-line--bottom {
  bottom: 50%;
  transform: translateY(50%) rotate(-45deg);
}

.cvh-header__nav {
  position: fixed;
  inset-inline: 0;
  top: 3.5rem; /* below header */
  background-color: rgba(247, 248, 251, 0.98);
  border-bottom: 1px solid rgba(148, 163, 184, 0.25);
  transform: translateY(-100%);
  opacity: 0;
  pointer-events: none;
  transition: transform var(--transition-base), opacity var(--transition-base);
  display: none;
}

.cvh-header__nav-list {
  flex-direction: column;
  align-items: flex-start;
  padding: 0.75rem 1.5rem 1.25rem;
}

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

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

.cvh-header--nav-open .cvh-header__nav {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
  display: block;
}

/* Larger screens */

@media (min-width: 768px) {
  .cvh-header__menu-toggle {
    display: none;
  }

  .cvh-header__nav {
    position: static;
    transform: none !important;
    opacity: 1 !important;
    pointer-events: auto !important;
    background: transparent;
    border-bottom: 0;
    display: flex;
  }

  .cvh-header__nav-list {
    flex-direction: row;
    padding: 0;
  }

  .cvh-header__nav-item--cta .cvh-header__nav-link--cta {
    width: auto;
  }
}

@media (max-width: 480px) {
  .cvh-header__brand-subtitle {
    display: none;
  }
}