/* ========================================
   SOCIETY ARTS - HEADER & NAVIGATION
   Header, sidebar nav, help menu, footer
   Version: 2.0
   ======================================== */

/* ========================================
   HEADER
   ======================================== */

.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-lg) var(--space-2xl);
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
  z-index: var(--z-sticky);
  height: var(--header-height);
}

.header-left {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.header-right {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.logo {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.logo-image {
  height: 28px;
  width: auto;
}

.logo-text {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-widest);
  margin: 0;
  color: var(--color-text-primary);
}

.logo:hover {
  opacity: 0.9;
}

/* ========================================
   HAMBURGER BUTTON
   ======================================== */

.hamburger-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-text-primary);
  padding: var(--space-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast);
}

.hamburger-btn:hover {
  background-color: var(--color-surface-alt);
}

/* ========================================
   SIDEBAR NAVIGATION
   ======================================== */

.nav-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--color-overlay);
  z-index: var(--z-overlay);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.nav-overlay.open {
  opacity: 1;
  visibility: visible;
}

.nav-sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--nav-sidebar-width);
  max-width: 85vw;
  height: 100%;
  background-color: var(--color-surface);
  z-index: var(--z-modal);
  transform: translateX(-100%);
  transition: transform var(--transition-slow);
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-xl);
}

.nav-sidebar.open {
  transform: translateX(0);
}

.nav-header {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  padding: var(--space-lg) var(--space-xl);
  border-bottom: 1px solid var(--color-border);
}

.nav-close-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-text-muted);
  padding: var(--space-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.nav-close-btn:hover {
  background-color: var(--color-surface-alt);
  color: var(--color-text-primary);
}

/* Search in sidebar */
.nav-search {
  padding: var(--space-lg) var(--space-xl);
}

.nav-search-input {
  display: flex;
  align-items: center;
  background-color: var(--color-surface-alt);
  border-radius: var(--radius-2xl);
  padding: var(--space-md) var(--space-lg);
  gap: var(--space-sm);
  border: 1px solid transparent;
  transition: all var(--transition-fast);
}

.nav-search-input:focus-within {
  background-color: white;
  border-color: var(--color-border-medium);
}

.nav-search-input input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  font-size: var(--text-base);
  color: var(--color-text-primary);
}

.nav-search-input input::placeholder {
  color: var(--color-text-placeholder);
}

.nav-content {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-sm) 0;
}

.nav-list {
  list-style: none;
}

.nav-item {
  margin: 0;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-xl);
  color: var(--color-text-primary);
  text-decoration: none;
  font-size: var(--text-base);
  font-weight: var(--weight-normal);
  transition: all var(--transition-fast);
  border-left: 3px solid transparent;
  cursor: pointer;
}

.nav-link:hover {
  background-color: var(--color-surface-alt);
}

.nav-link.active {
  background-color: var(--color-surface-alt);
  border-left-color: var(--color-accent);
  color: var(--color-accent);
  font-weight: var(--weight-medium);
}

.nav-link-icon {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--color-text-muted);
}

.nav-link.active .nav-link-icon {
  color: var(--color-accent);
}

.nav-link-badge {
  margin-left: auto;
  background-color: var(--color-surface-alt);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  padding: 2px 10px;
  border-radius: var(--radius-full);
}

.nav-divider {
  height: 1px;
  background-color: var(--color-border);
  margin: var(--space-lg) var(--space-xl);
}

/* ========================================
   HELP MENU (? Button)
   ======================================== */

.help-btn {
  background-color: transparent;
  color: var(--color-text-primary);
  border: 1px solid var(--color-border-medium);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  font-size: var(--text-md);
  font-weight: var(--weight-medium);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-sans);
  transition: all var(--transition-fast);
  position: relative;
}

.help-btn:hover {
  background-color: var(--color-surface-alt);
}

.help-menu {
  position: absolute;
  bottom: calc(100% + var(--space-md));
  right: 0;
  width: 280px;
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--color-border);
  padding: var(--space-md) 0;
  z-index: var(--z-popover);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-fast);
}

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

.help-menu-item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-xl);
  color: var(--color-text-primary);
  text-decoration: none;
  font-size: var(--text-base);
  transition: background-color var(--transition-fast);
  cursor: pointer;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
}

.help-menu-item:hover {
  background-color: var(--color-surface-alt);
}

.help-menu-icon {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
}

.help-menu-divider {
  height: 1px;
  background-color: var(--color-border);
  margin: var(--space-sm) var(--space-lg);
}

/* ========================================
   SUBHEADER
   ======================================== */

.subheader {
  padding: var(--space-lg) var(--space-2xl) 14px;
  background-color: var(--color-surface);
  flex-shrink: 0;
  z-index: var(--z-sticky);
}

.subheader-title {
  font-family: var(--font-serif);
  font-size: var(--text-lg);
  font-weight: var(--weight-semibold);
  margin: 0 0 var(--space-xs) 0;
  color: var(--color-text-primary);
  letter-spacing: var(--tracking-wider);
}

.subheader-text {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin: 0 0 var(--space-md) 0;
  line-height: var(--leading-normal);
}

/* ========================================
   FOOTER
   ======================================== */

.footer {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: var(--space-md);
  padding: 14px var(--space-2xl);
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  flex-shrink: 0;
  z-index: var(--z-sticky);
  height: var(--footer-height);
}

/* ========================================
   FORMAT SELECTOR
   ======================================== */

.format-selector {
  position: relative;
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.format-selector:hover {
  background-color: var(--color-surface-hover);
}

.format-selector-icon {
  color: var(--color-text-primary);
}

.format-selector-label {
  font-weight: var(--weight-medium);
  font-size: 14px;
}

.format-selector-value {
  margin-left: auto;
  color: var(--color-text-secondary);
  font-size: 14px;
}

.format-dropdown {
  position: absolute;
  top: calc(100% + var(--space-sm));
  left: 0;
  right: 0;
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
  padding: var(--space-sm);
  z-index: var(--z-dropdown);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-fast);
}

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

.format-option {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.format-option:hover {
  background-color: var(--color-surface-alt);
}

.format-option.selected {
  background-color: var(--color-accent-light);
}

.format-option-icon {
  width: 20px;
  height: 24px;
  border: 1.5px solid var(--color-text-muted);
  border-radius: 2px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.format-option.selected .format-option-icon {
  border-color: var(--color-accent);
}

.format-option-label {
  font-size: var(--text-base);
  color: var(--color-text-primary);
}

.format-option.selected .format-option-label {
  color: var(--color-accent);
  font-weight: var(--weight-medium);
}