/* ============================================
   Admin UI — Modern Dashboard
   ============================================ */

:root {
  --adm-sidebar-width: 280px;
  --adm-topbar-height: 60px;
  --adm-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.admin-body {
  min-height: 100vh;
  background-color: transparent;
  background-image: linear-gradient(180deg, rgba(255,255,255,0.6), rgba(255,255,255,0.4));
  color: var(--text);
  transition:
    background-color var(--transition),
    color var(--transition);
}

/* ========= AUTH SCREEN ========= */
.adm-auth-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: linear-gradient(180deg, rgba(255,255,255,0.6), rgba(255,255,255,0.3));
  backdrop-filter: blur(4px);
}

.adm-auth-card {
  width: 100%;
  max-width: 420px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  box-shadow: var(--shadow-xl);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.adm-auth-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--secondary), var(--accent));
}

@media (min-width: 768px) {
  .adm-auth-card {
    padding: 48px 40px;
    border-radius: var(--radius-xl);
  }
}

.adm-auth-logo {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--secondary), var(--accent));
  margin: 0 auto 24px;
  display: grid;
  place-items: center;
  color: white;
  box-shadow: var(--shadow-md);
}

.adm-auth-crest {
  font-weight: 900;
  font-size: 18px;
  letter-spacing: 0.06em;
  font-family: 'Merriweather', serif;
}

.adm-auth-title {
  font-size: 1.75rem;
  font-weight: 800;
  margin-bottom: 8px;
  color: var(--primary);
}

@media (min-width: 768px) {
  .adm-auth-title {
    font-size: 2rem;
  }
}

.adm-auth-subtitle {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.adm-form-group {
  text-align: left;
  margin-bottom: 20px;
}

.adm-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.adm-input {
  width: 100%;
  padding: 14px 18px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface-alt);
  color: var(--text);
  transition: var(--transition);
  min-height: 48px;
}

.adm-input:focus {
  outline: none;
  border-color: var(--secondary);
  background: var(--surface);
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
}

.adm-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 24px;
  border-radius: var(--radius);
  font-weight: 700;
  font-size: 0.95rem;
  transition: var(--transition-bounce);
  border: none;
  cursor: pointer;
  min-height: 48px; /* Touch target > 44px */
}

.adm-btn--primary {
  background: var(--secondary);
  color: white;
  box-shadow: var(--shadow-md);
}

.adm-btn--primary:hover {
  background: var(--secondary-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.adm-btn--outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}

.adm-btn--outline:hover {
  background: var(--surface-alt);
  transform: translateY(-2px);
}

.adm-btn--danger-outline {
  background: transparent;
  border: 1px solid rgba(239, 68, 68, 0.2);
  color: var(--danger);
}

.adm-btn--danger-outline:hover {
  background: rgba(239, 68, 68, 0.1);
  border-color: var(--danger);
  transform: translateY(-2px);
}

.adm-btn--success {
  background: var(--success);
  color: white;
  box-shadow: var(--shadow-sm);
}

.adm-btn--success:hover {
  filter: brightness(1.1);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.adm-btn--full {
  width: 100%;
}

.adm-btn--sm {
  padding: 8px 16px;
  font-size: 0.85rem;
  border-radius: var(--radius-sm);
  min-height: 40px;
}

.adm-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--secondary);
  font-weight: 600;
  font-size: 0.9rem;
  transition: var(--transition);
  min-height: 44px;
}

.adm-link {
  background: transparent;
  border: none;
  padding: 6px 10px;
}

.adm-link:hover {
  background: rgba(11,61,145,0.06);
  color: var(--secondary-hover);
}

.adm-link:focus-visible {
  outline: 3px solid rgba(11,61,145,0.12);
  outline-offset: 2px;
  border-radius: 8px;
}

/* Section titles and metric subs visibility */
.adm-section-title { font-size: 1rem; font-weight: 800; color: var(--primary); }
.adm-page-subtitle { color: var(--text-secondary); font-size: 0.95rem; }
.adm-metric-card__sub { color: var(--text-secondary); font-size: 0.9rem; font-weight: 600; }

/* ========= DASHBOARD SHELL ========= */
.adm-shell {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

@media (min-width: 1024px) {
  .adm-shell {
    flex-direction: row;
  }
}

/* Mobile Topbar */
.adm-topbar {
  display: flex;
  height: var(--adm-topbar-height);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0 16px;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 800;
  box-shadow: var(--shadow-sm);
}

@media (min-width: 1024px) {
  .adm-topbar {
    display: none;
  }
}

.adm-topbar__title {
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--primary);
}

.adm-topbar__menu,
.adm-topbar__action {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  display: grid;
  place-items: center;
  background: var(--surface-alt);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
}

/* Sidebar */
.adm-sidebar {
  width: var(--adm-sidebar-width);
  background: rgba(255,255,255,0.86);
  backdrop-filter: blur(6px);
  border-right: 1px solid var(--border);
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  padding: 24px 16px;
  transition: var(--transition-slow);
  transform: translateX(-100%);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.adm-sidebar.open {
  transform: translateX(0);
  box-shadow: var(--shadow-xl);
}

@media (min-width: 1024px) {
  .adm-sidebar {
    position: sticky;
    transform: translateX(0);
    box-shadow: none;
    height: 100vh;
  }
}

.adm-sidebar-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.4);
  backdrop-filter: blur(4px);
  z-index: 900;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

.adm-sidebar-overlay.active {
  opacity: 1;
  visibility: visible;
}

.adm-sidebar__header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 20px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--border-light);
}

.adm-sidebar__avatar {
  width: 44px;
  height: 44px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--secondary), var(--accent));
  color: white;
  display: grid;
  place-items: center;
  box-shadow: var(--shadow-sm);
}

.adm-sidebar__name {
  display: block;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--primary);
}

.adm-sidebar__role {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
}

.adm-sidebar__nav {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
}

.adm-sidebar__link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: var(--radius);
  color: var(--text-secondary);
  font-weight: 600;
  transition: var(--transition);
  width: 100%;
  text-align: left;
  font-size: 0.95rem;
  min-height: 48px;
}

.adm-sidebar__link:hover {
  background: var(--surface-alt);
  color: var(--secondary);
}

.adm-sidebar__link--active {
  background: var(--secondary);
  color: white !important;
  box-shadow: var(--shadow-md);
}

.adm-sidebar__theme-toggle {
  margin-top: auto;
  padding-top: 20px;
  border-top: 1px solid var(--border-light);
}

.adm-sidebar__theme-toggle .theme-toggle {
  width: 100%;
  height: 48px;
  border-radius: var(--radius);
  background: var(--surface-alt);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 16px;
}

/* ========= MAIN CONTENT ========= */
.adm-main {
  flex: 1;
  padding: 24px 16px;
  background: var(--bg);
  min-width: 0;
}

.adm-portal-banner {
  margin-bottom: 18px;
}
.adm-portal-banner__inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 12px 16px;
  display: flex;
  gap: 12px;
  align-items: center;
  background: linear-gradient(90deg, rgba(11,61,145,0.06), rgba(184,134,11,0.03));
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
}
.adm-portal-banner__crest {
  width: 48px;
  height: 48px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--secondary), var(--accent));
  color: white;
  display: grid;
  place-items: center;
  font-weight: 900;
  font-family: 'Merriweather', serif;
}
.adm-portal-banner__title { font-weight: 800; color: var(--primary); }
.adm-portal-banner__sub { font-size: 0.85rem; color: var(--text-muted); }

@media (min-width: 768px) {
  .adm-main {
    padding: 40px;
  }
}

.adm-page-header {
  margin-bottom: 24px;
}

@media (min-width: 768px) {
  .adm-page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 40px;
  }
}

.adm-page-title {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 4px;
}

@media (min-width: 768px) {
  .adm-page-title {
    font-size: 2.25rem;
    margin-bottom: 0;
  }
}

/* Metrics Grid */
.adm-metrics {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-bottom: 32px;
}

@media (min-width: 640px) {
  .adm-metrics {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .adm-metrics {
    grid-template-columns: repeat(4, 1fr);
  }
}

.adm-metric-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  position: relative;
  transition: var(--transition-bounce);
  box-shadow: var(--shadow-sm);
}

.adm-metric-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--secondary);
}

.adm-metric-card__value {
  font-size: 2rem;
  font-weight: 800;
  color: var(--primary);
  display: block;
  margin-top: 12px;
}

/* Metric card color variants */
.adm-metric-card--blue .adm-metric-card__icon--blue,
.adm-metric-card--red .adm-metric-card__icon--red,
.adm-metric-card--green .adm-metric-card__icon--green {
  display: inline-grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  color: white;
}
.adm-metric-card--blue .adm-metric-card__icon--blue { background: linear-gradient(135deg, var(--secondary), rgba(11,61,145,0.8)); }
.adm-metric-card--red .adm-metric-card__icon--red { background: linear-gradient(135deg, rgba(239,68,68,0.9), rgba(244, 163, 163, 0.2)); }
.adm-metric-card--green .adm-metric-card__icon--green { background: linear-gradient(135deg, rgba(16,185,129,0.9), rgba(56, 189, 248, 0.06)); }

/* Decorative accent for cards */
.adm-metric-card__decor { position: absolute; right: 14px; top: 14px; width: 64px; height: 64px; opacity: 0.07; border-radius: 8px; pointer-events: none; }

/* Dashboard Grid */
.adm-dash-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (min-width: 1024px) {
  .adm-dash-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.adm-table-container {
  overflow-x: auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.adm-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 0;
}

.adm-table th {
  text-align: left;
  padding: 16px 24px;
  background: var(--surface-alt);
  color: var(--text-secondary);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  border-bottom: 1px solid var(--border);
}

/* Keep table headers visible when scrolling on larger screens */
@media (min-width: 640px) {
  .adm-table thead th {
    position: sticky;
    top: 0;
    z-index: 10;
    background: rgba(255,255,255,0.9);
    backdrop-filter: blur(6px);
  }
}

.adm-table td {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-light);
  color: var(--text);
  font-size: 0.95rem;
  line-height: 1.45;
}

/* Forms in Admin */
.adm-form-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

@media (min-width: 768px) {
  .adm-form-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Responsive Tables to Cards (Optional but good) */
@media (max-width: 640px) {
  .adm-table-to-cards .adm-table, 
  .adm-table-to-cards thead, 
  .adm-table-to-cards tbody, 
  .adm-table-to-cards th, 
  .adm-table-to-cards td, 
  .adm-table-to-cards tr {
    display: block;
  }
  
  .adm-table-to-cards thead tr {
    position: absolute;
    top: -9999px;
    left: -9999px;
  }
  
  .adm-table-to-cards tr {
    border: 1px solid var(--border);
    margin-bottom: 16px;
    border-radius: var(--radius);
    background: var(--surface);
  }
  
  .adm-table-to-cards td {
    border: none;
    border-bottom: 1px solid var(--border-light);
    position: relative;
    padding-left: 50%;
    text-align: right;
  }
  
  .adm-table-to-cards td:last-child {
    border-bottom: none;
  }
  
  .adm-table-to-cards td::before {
    content: attr(data-label);
    position: absolute;
    left: 16px;
    width: 45%;
    padding-right: 10px;
    white-space: nowrap;
    text-align: left;
    font-weight: 700;
    color: var(--primary);
  }
}

/* Utility Classes */
.w-full { width: 100%; }
.hidden { display: none !important; }

/* Mobile responsiveness helpers */
.adm-table-card {
  overflow-x: auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 12px;
}

/* ===== Admin Dashboard: Recent Inventory & Claims ===== */
.adm-inventory-list-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.adm-inv-item {
  display: flex;
  gap: 12px;
  align-items: center;
  padding: 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.adm-inv-item__img {
  width: 64px;
  height: 64px;
  border-radius: 8px;
  overflow: hidden;
  background: var(--surface-alt);
  display: grid;
  place-items: center;
}
.adm-inv-item__img img { width: 100%; height: 100%; object-fit: cover; }
.adm-inv-item__info { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.adm-inv-item__top { display: flex; gap: 8px; align-items: center; justify-content: space-between; }
.adm-inv-item__name { font-weight: 800; color: var(--primary); display: block; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.adm-inv-badge { padding: 4px 8px; border-radius: 999px; font-weight: 800; font-size: 0.75rem; text-transform: uppercase; }
.adm-inv-badge--unclaimed { background: linear-gradient(90deg, rgba(11,61,145,0.9), rgba(11,61,145,0.8)); color: white; }
.adm-inv-badge--claimed { background: linear-gradient(90deg, rgba(245,158,11,0.9), rgba(245,158,11,0.8)); color: white; }
.adm-inv-badge--returned { background: linear-gradient(90deg, rgba(16,185,129,0.9), rgba(16,185,129,0.8)); color: white; }
.adm-inv-item__loc { color: var(--text-secondary); font-size: 0.95rem; margin-top: 6px; }
.adm-inv-item__time { color: var(--text-secondary); font-size: 0.85rem; margin-top: 4px; }

.adm-claim-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.adm-claim-card__header { display: flex; align-items: center; justify-content: space-between; }
.adm-claim-card__student { display: flex; gap: 12px; align-items: center; }
.adm-claim-card__avatar { width: 44px; height: 44px; border-radius: 8px; display: grid; place-items: center; color: white; font-weight: 800; }
.adm-claim-card__avatar--blue { background: linear-gradient(135deg, var(--secondary), rgba(11,61,145,0.9)); }
.adm-claim-card__avatar--red { background: linear-gradient(135deg, rgba(239,68,68,0.9), rgba(244,163,163,0.3)); }
.adm-claim-card__avatar--green { background: linear-gradient(135deg, rgba(16,185,129,0.9), rgba(56,189,248,0.06)); }
.adm-claim-card__name { font-weight: 800; color: var(--primary); }
.adm-claim-card__email { color: var(--text-secondary); font-size: 0.9rem; }
.adm-claim-card__item { display: flex; gap: 12px; align-items: center; }
.adm-claim-card__thumb { width: 56px; height: 56px; border-radius: 8px; background: var(--surface-alt); display: grid; place-items: center; }
.adm-claim-card__item-name { font-weight: 700; color: var(--text); font-size: 0.95rem; }
.adm-claim-card__item-loc { color: var(--text-secondary); font-size: 0.9rem; }
.adm-claim-card__actions { display: flex; gap: 8px; justify-content: flex-end; }

@media (max-width: 640px) {
  .adm-claim-card { padding: 10px; }
  .adm-claim-card__actions { justify-content: flex-start; flex-wrap: wrap; }
}

@media (max-width: 640px) {
  .adm-table th,
  .adm-table td {
    padding: 10px;
  }

  .adm-table {
    min-width: 520px;
  }

  .adm-page-header {
    padding: 0 12px;
  }

  .adm-auth-card {
    margin: 16px;
    width: calc(100% - 32px);
  }

  .adm-main {
    padding: 18px 12px;
  }

  .adm-sidebar {
    transform: translateX(-100%);
  }

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

  .modal {
    margin: 0 12px;
  }

  .modal__body {
    padding: 12px;
  }

  .adm-btn--sm {
    padding: 8px 10px;
    min-width: 44px;
  }
}

/* ===== Admin utility elements: badges, table thumbs, stacks ===== */
.adm-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border-radius: 999px;
  font-weight: 800;
  font-size: 0.75rem;
  text-transform: uppercase;
  color: white;
}
.adm-badge--pending { background: linear-gradient(90deg, rgba(245,158,11,0.95), rgba(245,158,11,0.85)); }
.adm-badge--available { background: linear-gradient(90deg, rgba(16,185,129,0.95), rgba(16,185,129,0.85)); }
.adm-badge--claimed { background: linear-gradient(90deg, rgba(11,61,145,0.95), rgba(11,61,145,0.85)); }
.adm-badge--returned { background: linear-gradient(90deg, rgba(16,185,129,0.9), rgba(16,185,129,0.8)); }
.adm-badge--open { background: linear-gradient(90deg, var(--secondary), rgba(11,61,145,0.82)); }
.adm-badge--matched { background: linear-gradient(90deg, rgba(16,185,129,0.95), rgba(16,185,129,0.8)); }
.adm-badge--rejected { background: rgba(239,68,68,0.95); }

.adm-table__thumb {
  width: 48px;
  height: 48px;
  border-radius: 8px;
  overflow: hidden;
  display: inline-block;
}
.adm-table__thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }

.adm-table__actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.adm-empty-inline {
  color: var(--text-secondary);
  font-size: 0.95rem;
  padding: 12px 8px;
}

.adm-table-empty {
  text-align: center;
  color: var(--text-secondary);
  padding: 18px 12px;
}

.adm-card-stack {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

@media (max-width: 640px) {
  .adm-table__thumb { width: 40px; height: 40px; }
}