/* Header styles for Tank Market PL */

.tm-header {
  position: sticky;
  top: 0;
  z-index: 40;
  height: var(--header-height);
  background: rgba(244, 247, 251, 0.96);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(148, 163, 184, 0.18);
}

.tm-header__inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

/* Brand */
.tm-header__brand {
  display: flex;
  align-items: center;
}

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

.tm-header__logo-mark {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: radial-gradient(circle at 30% 0, #e6f4ff 0, #1890ff 45%, #096dd9 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
}

.tm-header__logo-icon {
  color: #ffffff;
  font-size: 1.1rem;
}

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

.tm-header__site-name {
  font-weight: 600;
  font-size: var(--font-size-lg);
  letter-spacing: 0.01em;
}

.tm-header__site-tagline {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

/* Navigation */
.tm-header__nav {
  display: flex;
  align-items: center;
}

.tm-header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.tm-header__nav-link {
  position: relative;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  padding: 0.4rem 0;
}

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

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

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

/* Actions */
.tm-header__actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.tm-header__action-btn--primary {
  font-size: var(--font-size-sm);
  white-space: nowrap;
}

.tm-header__action-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  justify-content: center;
}

.tm-header__action-icon i {
  font-size: 0.95rem;
  color: var(--gray-700);
}

/* Mobile menu button */
.tm-header__menu-toggle {
  display: none;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full);
  border: 1px solid rgba(148, 163, 184, 0.4);
  background-color: rgba(255, 255, 255, 0.9);
  color: var(--gray-700);
}

.tm-header__menu-toggle:hover {
  background-color: var(--gray-50);
}

.tm-header__menu-toggle-box {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
}

.tm-header__menu-toggle-line {
  width: 18px;
  height: 2px;
  border-radius: var(--radius-full);
  background-color: var(--gray-700);
  transition: transform var(--transition-base), opacity var(--transition-base), width var(--transition-base);
}

.tm-header__menu-toggle-text {
  font-size: var(--font-size-xs);
  font-weight: 500;
}

.tm-header__menu-toggle[aria-expanded="true"] .tm-header__menu-toggle-line:nth-child(1) {
  transform: translateY(3px) rotate(45deg);
}

.tm-header__menu-toggle[aria-expanded="true"] .tm-header__menu-toggle-line:nth-child(2) {
  opacity: 0;
  width: 0;
}

.tm-header__menu-toggle[aria-expanded="true"] .tm-header__menu-toggle-line:nth-child(3) {
  transform: translateY(-3px) rotate(-45deg);
}

/* Responsive behavior */
@media (max-width: 960px) {
  .tm-header__inner {
    gap: var(--space-3);
  }

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

  .tm-header__nav {
    position: fixed;
    inset: var(--header-height) 0 auto 0;
    max-height: calc(100vh - var(--header-height));
    background: rgba(244, 247, 251, 0.98);
    border-bottom: 1px solid rgba(148, 163, 184, 0.24);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition-base), opacity var(--transition-base), visibility var(--transition-base);
  }

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

  .tm-header__nav-link {
    width: 100%;
    font-size: var(--font-size-base);
  }

  .tm-header__nav--open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .tm-header__actions {
    margin-left: auto;
  }

  .tm-header__action-btn--primary {
    display: none;
  }
}

@media (max-width: 640px) {
  .tm-header__site-tagline {
    display: none;
  }

  .tm-header__actions {
    gap: 0.35rem;
  }
}