/* ==========================================================================
   ADMIN.CSS — Ultra-Premium Admin Interface BibloSpace v2
   Sidebar gradient · Glass KPIs · Premium table · Micro-interactions
   ========================================================================== */

body {
  background: linear-gradient(145deg, #EEF2F8 0%, #E8ECF5 50%, #EDF0F5 100%);
  background-attachment: fixed;
}

/* --------------------------------------------------------------------------
   LAYOUT DEUX COLONNES SIDEBAR + CONTENU
   -------------------------------------------------------------------------- */
.admin-layout {
  display: grid;
  grid-template-columns: 264px 1fr;
  min-height: 100vh;
}

@media (max-width: 1024px) {
  .admin-layout { grid-template-columns: 1fr; }
}

/* --------------------------------------------------------------------------
   SIDEBAR PREMIUM — Gradient profond + glass nav items
   -------------------------------------------------------------------------- */
.admin-sidebar {
  background: linear-gradient(180deg, #070D1A 0%, #0A0F1E 40%, #080C18 100%);
  color: #fff;
  display: flex;
  flex-direction: column;
  height: 100vh;
  position: sticky;
  top: 0;
  transition: transform 350ms var(--ease-smooth);
  width: 264px;
  border-right: 1px solid rgba(255,255,255,0.05);
  box-shadow: 4px 0 40px rgba(0,0,0,0.30);
  overflow: hidden;
}

/* Ambient glow inside sidebar */
.admin-sidebar::before {
  content: '';
  position: absolute;
  top: -20%;
  left: -30%;
  width: 120%;
  height: 50%;
  background: radial-gradient(ellipse, rgba(29,52,97,0.35) 0%, transparent 70%);
  pointer-events: none;
}
.admin-sidebar::after {
  content: '';
  position: absolute;
  bottom: -10%;
  right: -20%;
  width: 80%;
  height: 40%;
  background: radial-gradient(ellipse, rgba(10,126,114,0.18) 0%, transparent 70%);
  pointer-events: none;
}

@media (max-width: 1024px) {
  .admin-sidebar {
    position: fixed;
    top: 0; left: 0;
    z-index: 50;
    transform: translateX(-100%);
  }
  .admin-sidebar.open { transform: translateX(0); }
}

/* Sidebar backdrop */
.sidebar-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(5, 10, 22, 0.70);
  z-index: 49;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}
.sidebar-backdrop.active { display: block; }

/* Nav active item — ambre left border + glass bg */
.admin-nav-item-active {
  background: rgba(29,52,97,0.28) !important;
  color: #fff !important;
  border-left: 3px solid #C97B2C !important;
  padding-left: 17px !important;
  box-shadow: inset 0 0 24px rgba(29,52,97,0.15) !important;
}

/* Sidebar nav items (default injected by admin-common.js) */
.admin-sidebar .sidebar-nav-item,
.admin-sidebar [data-nav-item] {
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 11px 20px;
  border-radius: 12px;
  margin: 0 12px 2px;
  font-size: 14px;
  font-family: var(--font-ui);
  font-weight: 500;
  color: rgba(255,255,255,0.48);
  cursor: pointer;
  text-decoration: none;
  transition: all var(--t-normal);
  position: relative;
  z-index: 1;
}
.admin-sidebar .sidebar-nav-item:hover {
  background: rgba(255,255,255,0.06);
  color: rgba(255,255,255,0.82);
  transform: translateX(2px);
}

/* --------------------------------------------------------------------------
   ADMIN CONTENT AREA
   -------------------------------------------------------------------------- */
.admin-layout > div:not(.admin-sidebar):not(.sidebar-backdrop) {
  position: relative;
}

.admin-layout header {
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(20px) saturate(1.8);
  -webkit-backdrop-filter: blur(20px) saturate(1.8);
  border-bottom: 1px solid rgba(255,255,255,0.5);
  box-shadow: 0 2px 16px rgba(0,0,0,0.05);
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}
@media (min-width: 768px) {
  .admin-layout header {
    padding-left: 2rem;
    padding-right: 2rem;
  }
}

/* --------------------------------------------------------------------------
   KPI CARDS — Glass flottantes avec hover lift
   -------------------------------------------------------------------------- */
.kpi-card {
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(20px) saturate(1.8);
  -webkit-backdrop-filter: blur(20px) saturate(1.8);
  border: 1px solid rgba(255,255,255,0.60);
  border-radius: 20px;
  padding: 22px 26px;
  transition: transform var(--t-spring), box-shadow var(--t-normal);
  box-shadow: 0 2px 20px rgba(0,0,0,0.06);
  position: relative;
  overflow: hidden;
}
.kpi-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(29,52,97,0.20), rgba(201,123,44,0.15), transparent);
}
.kpi-card:hover {
  transform: translateY(-5px) scale(1.01);
  box-shadow: 0 16px 48px rgba(0,0,0,0.10);
}

.kpi-card.priority {
  border-top: 3px solid var(--color-primary);
}
.kpi-card.priority::before { display: none; }

/* KPI icon wrapper */
.kpi-icon-wrap {
  width: 44px; height: 44px;
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 14px;
  transition: transform var(--t-spring);
}
.kpi-card:hover .kpi-icon-wrap { transform: scale(1.10) rotate(-4deg); }

.kpi-icon-primary { background: rgba(29,52,97,0.10); color: var(--color-primary); }
.kpi-icon-accent  { background: rgba(201,123,44,0.10); color: var(--color-accent); }
.kpi-icon-teal    { background: rgba(10,126,114,0.10); color: var(--color-teal); }
.kpi-icon-success { background: rgba(26,122,74,0.10); color: var(--color-lib-active); }
.kpi-icon-warning { background: rgba(180,83,9,0.10); color: var(--color-status-on-loan); }

@media (max-width: 639px) { .kpi-card { padding: 16px 18px; } }

/* --------------------------------------------------------------------------
   TABLEAUX DE DONNÉES — Premium avec thead gradient
   -------------------------------------------------------------------------- */
.data-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-family: var(--font-ui);
  font-size: 14px;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 2px 20px rgba(0,0,0,0.05);
}

.data-table th {
  background: linear-gradient(135deg, #1D3461 0%, #2A4B8A 100%);
  color: rgba(255,255,255,0.75);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  padding: 14px 18px;
  text-align: left;
  border-bottom: 1px solid rgba(255,255,255,0.12);
}
.data-table th:first-child { border-radius: 0; }
.data-table th:last-child  { border-radius: 0; }

.data-table td {
  padding: 14px 18px;
  color: var(--color-gray-700);
  border-bottom: 1px solid rgba(29,52,97,0.05);
  background: rgba(255,255,255,0.75);
  backdrop-filter: blur(8px);
  transition: background var(--t-fast);
}

.data-table tr:hover td {
  background: rgba(29,52,97,0.04);
}
.data-table tr:last-child td { border-bottom: none; }

/* Mobile card view */
@media (max-width: 639px) {
  .data-table { border-radius: 0; box-shadow: none; }
  .data-table thead { display: none; }
  .data-table tbody tr {
    display: block;
    background: rgba(255,255,255,0.88);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255,255,255,0.55);
    border-radius: 16px;
    margin-bottom: 10px;
    padding: 14px 16px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.05);
  }
  .data-table tr:hover td { background: transparent; }
  .data-table td {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    padding: 6px 0;
    border-bottom: 1px solid rgba(29,52,97,0.05);
    font-size: 13px;
    gap: 8px;
    background: transparent;
    backdrop-filter: none;
  }
  .data-table td:last-child { border-bottom: none; padding-bottom: 0; }
  .data-table td::before {
    content: attr(data-label);
    font-size: 10px;
    font-weight: 700;
    color: var(--color-gray-400);
    text-transform: uppercase;
    letter-spacing: 0.07em;
    flex-shrink: 0;
    min-width: 70px;
    padding-top: 1px;
  }
  .data-table td[data-label=""] { display: block; }
  .data-table td[data-label=""]::before { display: none; }
}

/* --------------------------------------------------------------------------
   UPLOAD ZONES
   -------------------------------------------------------------------------- */
.upload-zone {
  border: 2px dashed rgba(29,52,97,0.25);
  border-radius: 16px;
  transition: border-color var(--t-normal), background var(--t-normal), box-shadow var(--t-normal);
  cursor: pointer;
  position: relative;
  background: rgba(255,255,255,0.60);
  backdrop-filter: blur(8px);
}
.upload-zone:hover,
.upload-zone:focus-within {
  border-color: var(--color-primary);
  background: rgba(29,52,97,0.03);
  box-shadow: 0 0 0 4px rgba(29,52,97,0.06);
}
.upload-zone.has-file {
  border-color: var(--color-status-available);
  background: rgba(26,122,74,0.04);
}

/* --------------------------------------------------------------------------
   BOTTOM NAV MOBILE — Glass dark
   -------------------------------------------------------------------------- */
.mobile-bottom-nav {
  display: none;
  position: fixed;
  bottom: 0; left: 0; right: 0;
  background: rgba(8, 12, 24, 0.92);
  backdrop-filter: blur(20px) saturate(1.5);
  -webkit-backdrop-filter: blur(20px) saturate(1.5);
  border-top: 1px solid rgba(255,255,255,0.06);
  z-index: 48;
  height: 64px;
  padding: 0 4px;
  padding-bottom: env(safe-area-inset-bottom, 0px);
  align-items: stretch;
}

@media (max-width: 1023px) {
  .mobile-bottom-nav { display: flex; }
  .admin-layout > div:not(.admin-sidebar) { padding-bottom: 64px; }
}

.mobile-nav-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  color: rgba(255,255,255,0.32);
  font-size: 10px;
  font-family: var(--font-ui);
  font-weight: 500;
  background: none;
  border: none;
  cursor: pointer;
  border-radius: 10px;
  transition: color var(--t-fast), background var(--t-fast);
  -webkit-tap-highlight-color: transparent;
  line-height: 1.1;
}
.mobile-nav-item:hover,
.mobile-nav-item.active {
  color: #fff;
  background: rgba(255,255,255,0.05);
}

.mobile-nav-active-bar {
  width: 20px; height: 2.5px;
  border-radius: 9999px;
  background: linear-gradient(90deg, #1D3461, #C97B2C);
  margin-top: 3px;
  box-shadow: 0 0 8px rgba(201,123,44,0.40);
}

/* --------------------------------------------------------------------------
   COMPOSANTS ADMIN SPÉCIFIQUES
   -------------------------------------------------------------------------- */

/* Stat strip card */
.stat-strip-card {
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(16px) saturate(1.6);
  -webkit-backdrop-filter: blur(16px) saturate(1.6);
  border: 1px solid rgba(255,255,255,0.60);
  border-radius: 16px;
  padding: 16px 18px;
  display: flex;
  align-items: center;
  gap: 14px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.05);
  transition: transform var(--t-spring), box-shadow var(--t-normal);
}
.stat-strip-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 28px rgba(0,0,0,0.08);
}

.stat-strip-icon {
  width: 40px; height: 40px;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  transition: transform var(--t-spring);
}
.stat-strip-card:hover .stat-strip-icon { transform: rotate(-6deg) scale(1.10); }

/* Activity timeline */
.activity-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}
.activity-icon-wrap {
  width: 36px; height: 36px;
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}
.activity-line { position: relative; }
.activity-line::after {
  content: '';
  position: absolute;
  left: 18px; top: 36px; bottom: -16px;
  width: 1px;
  background: linear-gradient(to bottom, rgba(29,52,97,0.15), transparent);
}
.activity-item:last-child .activity-line::after { display: none; }

/* Quick action buttons */
.quick-action-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-radius: 14px;
  border: 1.5px solid rgba(29,52,97,0.12);
  background: rgba(255,255,255,0.72);
  backdrop-filter: blur(8px);
  cursor: pointer;
  transition: all var(--t-spring);
  text-decoration: none;
  box-shadow: 0 1px 6px rgba(0,0,0,0.04);
}
.quick-action-btn:hover {
  border-color: rgba(29,52,97,0.28);
  background: rgba(255,255,255,0.92);
  transform: translateX(4px);
  box-shadow: 0 4px 16px rgba(29,52,97,0.08);
}

/* Overdue alert banner */
.overdue-alert-banner {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(107,33,33,0.08);
  border: 1px solid rgba(107,33,33,0.18);
  border-radius: 12px;
  padding: 10px 14px;
  font-size: 13px;
  font-family: var(--font-ui);
  color: var(--color-status-damaged);
  font-weight: 500;
  white-space: nowrap;
  backdrop-filter: blur(8px);
}

/* Popular books bar */
.pop-book-bar-track {
  height: 5px;
  border-radius: 9999px;
  background: rgba(29,52,97,0.08);
  flex: 1;
  overflow: hidden;
}
.pop-book-bar-fill {
  height: 100%;
  border-radius: 9999px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
  transition: width 0.9s cubic-bezier(.4,0,.2,1);
  box-shadow: 0 0 6px rgba(29,52,97,0.25);
}

/* Plan badge */
.plan-badge-free {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 12px;
  border-radius: 9999px;
  background: rgba(29,52,97,0.07);
  border: 1px solid rgba(29,52,97,0.15);
  color: var(--color-gray-600);
  font-size: 11px;
  font-weight: 700;
  font-family: var(--font-ui);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  backdrop-filter: blur(4px);
}
.plan-badge-pro {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 12px;
  border-radius: 9999px;
  background: linear-gradient(135deg, rgba(201,123,44,0.12), rgba(224,149,64,0.10));
  border: 1px solid rgba(201,123,44,0.28);
  color: var(--color-accent);
  font-size: 11px;
  font-weight: 700;
  font-family: var(--font-ui);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  box-shadow: 0 2px 8px rgba(201,123,44,0.12);
}

/* --------------------------------------------------------------------------
   ADMIN PANELS (cartes internes)
   -------------------------------------------------------------------------- */
.admin-panel {
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(20px) saturate(1.6);
  -webkit-backdrop-filter: blur(20px) saturate(1.6);
  border: 1px solid rgba(255,255,255,0.60);
  border-radius: 20px;
  box-shadow: 0 4px 24px rgba(0,0,0,0.06);
  overflow: hidden;
}
.admin-panel-header {
  padding: 18px 24px;
  border-bottom: 1px solid rgba(29,52,97,0.06);
  background: rgba(255,255,255,0.50);
}

/* --------------------------------------------------------------------------
   RESPONSIVE
   -------------------------------------------------------------------------- */
@media (max-width: 767px) {
  .admin-layout > div:not(.admin-sidebar) > div:not(header):not(.mobile-bottom-nav) {
    padding: 1rem !important;
  }
}
@media (max-width: 639px) {
  .admin-layout .grid-cols-2,
  .admin-layout .grid-cols-3 {
    grid-template-columns: 1fr !important;
  }
  .admin-layout .kpi-grid-2 {
    grid-template-columns: repeat(2, 1fr) !important;
  }
}
@media (max-width: 1023px) {
  .btn-icon { min-height: 40px; min-width: 40px; }
  .data-table td button { min-height: 40px; min-width: 40px; }
}

.overflow-x-auto { -webkit-overflow-scrolling: touch; }