/* Admin UI theme */
:root {
  --admin-bg: #f6f7fb;
  --admin-surface: #ffffff;
  --admin-border: #e6e8ef;
  --admin-text: #0f172a;
  --admin-muted: #64748b;
  --admin-primary: #e31e24;
  --admin-primary-dark: #b81519;
  --admin-accent: #111827;
  --background-light: #f6f7fb;
  --background-dark: #0f172a;
  --surface-light: #ffffff;
  --surface-dark: #1e293b;
  --surface-hover: #2b3647;
  --surface-border: #334155;
  --border-light: #e6e8ef;
  --border-dark: #334155;
  --text-main: #0f172a;
  --text-sub: #64748b;
  --text-muted: #94a3b8;
  --primary-hover: #b81519;
}

/* Material Symbols Icon Font */
.material-symbols-outlined {
  font-family: 'Material Symbols Outlined';
  font-weight: normal;
  font-style: normal;
  font-size: 24px;
  display: inline-flex;
  line-height: 1;
  text-transform: none;
  letter-spacing: normal;
  word-wrap: normal;
  white-space: nowrap;
  direction: ltr;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

html.fonts-loading .material-symbols-outlined {
  visibility: hidden;
}

body.admin-ui {
  background: var(--admin-bg);
  color: var(--admin-text);
}

body.admin-ui .admin-card {
  background: var(--admin-surface);
  border: 1px solid var(--admin-border);
  border-radius: 14px;
  box-shadow: 0 6px 24px rgba(15, 23, 42, 0.06);
}

body.admin-ui .admin-title {
  font-weight: 800;
  letter-spacing: -0.01em;
}

body.admin-ui table {
  width: 100%;
  border-collapse: collapse;
}

body.admin-ui thead th {
  text-transform: uppercase;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--admin-muted);
  background: #f1f5f9;
  border-bottom: 1px solid var(--admin-border);
}

body.admin-ui td,
body.admin-ui th {
  padding: 12px 16px;
}

body.admin-ui tbody tr {
  border-bottom: 1px solid var(--admin-border);
}

body.admin-ui input,
body.admin-ui select,
body.admin-ui textarea {
  border-radius: 10px;
  border: 1px solid var(--admin-border);
}

body.admin-ui input:focus,
body.admin-ui select:focus,
body.admin-ui textarea:focus {
  outline: none;
  border-color: var(--admin-primary);
  box-shadow: 0 0 0 3px rgba(227, 30, 36, 0.15);
}

body.admin-ui .admin-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  background: #fef2f2;
  color: var(--admin-primary);
}

body.admin-ui .admin-section-title {
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #94a3b8;
}

body.admin-ui .sidebar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 20px;
}

body.admin-ui .sidebar-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-radius: 10px;
  color: #cbd5f5;
  transition: background 0.2s ease, color 0.2s ease;
}

body.admin-ui .sidebar-link:hover {
  background: rgba(255, 255, 255, 0.06);
  color: #ffffff;
}

body.admin-ui .sidebar-link-active {
  background: rgba(227, 30, 36, 0.15);
  color: #ffffff;
  border: 1px solid rgba(227, 30, 36, 0.4);
}

body.admin-ui .sidebar-panel {
  background: linear-gradient(180deg, #0b1220 0%, #0f172a 100%);
}

/* ============================================
   RESPONSIVE DESIGN - Mobile First
   ============================================ */

/* Mobile: Hide sidebar, use hamburger menu */
@media (max-width: 767px) {
  aside.sidebar-panel {
    display: none;
    position: fixed;
    left: -100%;
    transition: left 0.3s ease;
    z-index: 60;
    width: 16rem;
    height: 100vh;
    top: 0;
    bottom: 0;
    overflow-y: auto;
  }
  
  aside.sidebar-panel.open {
    left: 0;
    display: flex;
  }
  
  .ml-64 {
    margin-left: 0;
  }
  
  header {
    padding: 0.5rem 1rem;
  }
  
  .admin-title {
    font-size: 1.25rem;
  }
  
  .admin-subtitle {
    font-size: 0.75rem;
  }
  
  .admin-pill {
    font-size: 10px;
    padding: 4px 8px;
  }
}

/* Tablet: Smaller sidebar */
@media (min-width: 768px) and (max-width: 1023px) {
  aside.sidebar-panel {
    width: 12rem;
  }
  
  .ml-64 {
    margin-left: 12rem;
  }
}

/* Desktop: Full width sidebar */
@media (min-width: 1024px) {
  aside.sidebar-panel {
    width: 16rem;
  }
  
  .ml-64 {
    margin-left: 16rem;
  }
  
  header {
    padding: 1rem 2rem;
  }
  
  .admin-title {
    font-size: 1.5rem;
  }
}

/* ============================================
   ACCESSIBILITY - Keyboard Navigation
   ============================================ */

*:focus-visible {
  outline: 2px solid var(--admin-primary);
  outline-offset: 2px;
}

*:focus {
  outline: none;
}

button:focus-visible,
a:focus-visible,
input:focus-visible {
  outline: 2px solid var(--admin-primary);
  outline-offset: 2px;
}

/* Skip to main content link */
.skip-to-main {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--admin-primary);
  color: white;
  padding: 8px;
  z-index: 100;
}

.skip-to-main:focus {
  top: 0;
}

/* ============================================
   DARK MODE SUPPORT
   ============================================ */

:root {
  --admin-bg-dark: #0f172a;
  --admin-surface-dark: #1e293b;
  --admin-border-dark: #334155;
  --admin-text-dark: #f1f5f9;
  --admin-muted-dark: #94a3b8;
  --background-light: #f6f7fb;
  --background-dark: #0f172a;
}

@media (prefers-color-scheme: dark) {
  body.admin-ui {
    background: var(--admin-bg-dark);
    color: var(--admin-text-dark);
  }
  
  body.admin-ui .admin-card {
    background: var(--admin-surface-dark);
    border-color: var(--admin-border-dark);
  }
  
  body.admin-ui input,
  body.admin-ui select,
  body.admin-ui textarea {
    background: var(--admin-surface-dark);
    color: var(--admin-text-dark);
    border-color: var(--admin-border-dark);
  }
  
  body.admin-ui thead th {
    background: #0f172a;
    color: var(--admin-muted-dark);
    border-color: var(--admin-border-dark);
  }
  
  body.admin-ui tbody tr {
    border-color: var(--admin-border-dark);
  }
}

/* Manual dark mode toggle */
body.dark-mode {
  color-scheme: dark;
  background: var(--admin-bg-dark);
  color: var(--admin-text-dark);
}

body.dark-mode .admin-card {
  background: var(--admin-surface-dark);
  border-color: var(--admin-border-dark);
}

body.dark-mode input,
body.dark-mode select,
body.dark-mode textarea {
  background: var(--admin-surface-dark);
  color: var(--admin-text-dark);
  border-color: var(--admin-border-dark);
}

/* ============================================
   PERFORMANCE & GPU ACCELERATION
   ============================================ */

header {
  will-change: transform;
  contain: layout style paint;
}

.sidebar-panel {
  will-change: left;
}

/* ============================================
   MOBILE MENU BUTTON
   ============================================ */

#mobile-menu-toggle {
  display: none;
}

@media (max-width: 767px) {
  #mobile-menu-toggle {
    display: inline-flex;
  }
  
  #mobile-menu-backdrop {
    display: none !important;
  }
  
  #mobile-menu-backdrop.show {
    display: block !important;
  }
}

@media (min-width: 768px) {
  #mobile-menu-toggle {
    display: none !important;
  }
  
  #mobile-menu-backdrop {
    display: none !important;
  }
}

/* ============================================
   FORM IMPROVEMENTS
   ============================================ */

label {
  display: block;
  font-weight: 500;
  margin-bottom: 0.25rem;
  color: var(--admin-text);
}

label .required {
  color: var(--admin-primary);
  margin-left: 2px;
}

input[aria-required="true"],
select[aria-required="true"],
textarea[aria-required="true"] {
  border-color: var(--admin-primary);
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}