/* ========================
   Site Header Styles
   ======================== */
:root {
  --header-bg: rgba(255, 255, 255, 0.95);
  --header-border: rgba(226, 232, 240, 0.9);
  --header-text: #1f2a37;
  --header-muted: #64748b;
  --header-accent: #2563eb;
  --header-accent-hover: #1d4ed8;
  --header-shadow: 0 12px 32px rgba(15, 23, 42, 0.08);
  --logo-height-desktop: 82px;
  --logo-height-tablet: 72px;
  --logo-height-mobile: 64px;
}

[data-theme="dark"] {
  --header-bg: rgba(15, 23, 42, 0.88);
  --header-border: rgba(30, 41, 59, 0.8);
  --header-text: #e2e8f0;
  --header-muted: #94a3b8;
  --header-accent: #60a5fa;
  --header-accent-hover: #3b82f6;
  --header-shadow: 0 14px 36px rgba(2, 6, 23, 0.45);
}

.app-header {
  position: sticky;
  top: 0;
  z-index: 1500;
  background: var(--header-bg);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--header-border);
  box-shadow: var(--header-shadow);
}

.app-header__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.app-logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--header-text);
  font-weight: 600;
  flex-shrink: 0;
}

.app-logo img {
  height: var(--logo-height-desktop);
  width: auto;
  object-fit: contain;
  border-radius: 12px;
  padding: 0;
  background: transparent;
  box-shadow: none;
}

.app-logo span {
  display: flex;
  flex-direction: column;
  font-size: 0.9rem;
  line-height: 1.2;
}

.app-logo small {
  font-size: 0.75rem;
  color: var(--header-muted);
  font-weight: 500;
}

.app-nav {
  display: flex;
  align-items: center;
  gap: 12px;
}

.app-nav__group {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.app-nav__link,
.app-nav form button {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 16px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  color: var(--header-muted);
  border: none;
  background: transparent;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}

.app-nav__link--primary {
  background: var(--header-accent);
  color: #fff;
  box-shadow: 0 12px 24px rgba(37, 99, 235, 0.28);
}

.app-nav__link--ghost {
  border: 1px solid var(--header-border);
  background: rgba(255, 255, 255, 0.6);
}

.app-nav__link:hover,
.app-nav form button:hover {
  color: var(--header-accent);
  background: rgba(37, 99, 235, 0.1);
}

.app-nav__link.is-active {
  color: var(--header-accent);
  background: rgba(37, 99, 235, 0.12);
  box-shadow: 0 8px 20px rgba(37, 99, 235, 0.16);
}

.app-nav form {
  margin: 0;
}

.app-nav__toggle {
  display: none;
  border: 1px solid rgba(148, 163, 184, 0.5);
  background: var(--header-bg);
  color: var(--header-text);
  border-radius: 12px;
  padding: 9px 12px;
  font-size: 0.95rem;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.2s ease, color 0.2s ease;
  align-items: center;
  gap: 8px;
}

.app-nav__toggle:hover {
  background: rgba(37, 99, 235, 0.08);
  color: var(--header-accent-hover);
  transform: translateY(-1px);
}

.app-nav__toggle-icon {
  width: 22px;
  height: 2px;
  background: currentColor;
  border-radius: 999px;
  position: relative;
  display: inline-block;
}

.app-nav__toggle-icon::before,
.app-nav__toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 22px;
  height: 2px;
  background: currentColor;
  border-radius: 999px;
}

.app-nav__toggle-icon::before {
  top: -7px;
}

.app-nav__toggle-icon::after {
  top: 7px;
}

.app-nav__toggle-text {
  font-weight: 700;
  font-size: 0.9rem;
}

.app-nav--mobile {
  display: none;
}

.app-nav--mobile.is-open {
  display: flex;
}

#mobileMenu {
  position: absolute;
  top: 100%;
  right: 16px;
  left: 16px;
  margin-top: 12px;
  background: var(--header-bg);
  border: 1px solid var(--header-border);
  border-radius: 18px;
  padding: 16px 18px;
  box-shadow: 0 28px 60px rgba(15, 23, 42, 0.25);
  flex-direction: column;
  gap: 10px;
  z-index: 1400;
}

#mobileMenu a,
#mobileMenu form button {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px;
  border-radius: 12px;
  font-weight: 600;
  color: var(--header-text);
  text-decoration: none;
  border: none;
  background: rgba(148, 163, 184, 0.18);
  transition: background 0.2s ease, color 0.2s ease;
}

#mobileMenu a.is-active {
  background: rgba(37, 99, 235, 0.12);
  color: var(--header-accent);
}

#mobileMenu a:hover,
#mobileMenu form button:hover {
  background: rgba(37, 99, 235, 0.16);
  color: var(--header-accent);
}

@media (max-width: 1024px) {
  .app-nav {
    display: none;
  }

  .app-nav__toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .app-logo img {
    height: var(--logo-height-tablet);
  }
}

@media (max-width: 640px) {
  .app-header__inner {
    padding: 14px 16px;
  }

  .app-logo img {
    height: var(--logo-height-mobile);
  }

  #mobileMenu {
    right: 12px;
    left: 12px;
  }
}

.app-header--wide .app-header__inner {
  max-width: 1280px;
  padding-left: 24px;
  padding-right: 24px;
}