:root {
  --bg: #0d0f13;
  --bg-elevated: #151922;
  --bg-panel: #1a1f2a;
  --bg-hover: #222836;
  --border: #2c3342;
  --text: #e8eaed;
  --text-muted: #9aa0a6;
  --accent: #d4a017;
  --accent-soft: rgba(212, 160, 23, 0.14);
  --danger: #ff6b6b;
  --success: #3dd68c;
  --warning: #f0c14b;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  --radius: 12px;
  --sidebar-width: 240px;
  --font-sans: "Segoe UI", "Trebuchet MS", sans-serif;
  --font-display: Georgia, "Times New Roman", serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font-sans);
  color: var(--text);
  background:
    radial-gradient(900px 420px at 10% -10%, rgba(212, 160, 23, 0.08), transparent 55%),
    radial-gradient(700px 360px at 100% 0%, rgba(70, 90, 140, 0.12), transparent 50%),
    var(--bg);
  min-height: 100vh;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

img { max-width: 100%; display: block; }

.app-shell {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  min-height: 100vh;
}

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  background: linear-gradient(180deg, #12151c 0%, #0f1218 100%);
  border-right: 1px solid var(--border);
  padding: 1.25rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.brand {
  font-family: var(--font-display);
  font-size: 1.35rem;
  color: var(--accent);
  letter-spacing: 0.03em;
  padding: 0.35rem 0.5rem 0.75rem;
  border-bottom: 1px solid var(--border);
}

.brand small {
  display: block;
  color: var(--text-muted);
  font-family: var(--font-sans);
  font-size: 0.72rem;
  margin-top: 0.2rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  flex: 1;
}

.nav a {
  color: var(--text);
  text-decoration: none;
  padding: 0.7rem 0.8rem;
  border-radius: 8px;
  border: 1px solid transparent;
}

.nav a:hover,
.nav a.active {
  background: var(--accent-soft);
  border-color: rgba(212, 160, 23, 0.25);
  color: #f3d57a;
}

.sidebar-footer {
  border-top: 1px solid var(--border);
  padding-top: 0.75rem;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.main {
  padding: 1.25rem 1.5rem 2.5rem;
  min-width: 0;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.topbar h1 {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 650;
}

.menu-toggle {
  display: none;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 0.55rem 0.8rem;
  cursor: pointer;
}

.panel {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  box-shadow: var(--shadow);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.9rem;
  margin-bottom: 1.25rem;
}

.stat-card h3 {
  margin: 0;
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 600;
}

.stat-card .value {
  margin-top: 0.45rem;
  font-size: 1.6rem;
  font-family: var(--font-display);
  color: var(--accent);
}

.muted { color: var(--text-muted); }
.small { font-size: 0.9rem; }

.alert {
  border-radius: 10px;
  padding: 0.8rem 1rem;
  margin-bottom: 1rem;
  border: 1px solid transparent;
}
.alert-success { background: rgba(61, 214, 140, 0.12); border-color: rgba(61, 214, 140, 0.35); }
.alert-error { background: rgba(255, 107, 107, 0.12); border-color: rgba(255, 107, 107, 0.35); }
.alert-warning { background: rgba(240, 193, 75, 0.12); border-color: rgba(240, 193, 75, 0.35); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 0.65rem 1rem;
  font-weight: 650;
  cursor: pointer;
  text-decoration: none;
  font-size: 0.95rem;
}
.btn:hover { text-decoration: none; filter: brightness(1.05); }
.btn-primary { background: var(--accent); color: #15120a; }
.btn-secondary { background: var(--bg-hover); color: var(--text); border-color: var(--border); }
.btn-danger { background: rgba(255, 107, 107, 0.15); color: #ffb4b4; border-color: rgba(255, 107, 107, 0.35); }
.btn-block { width: 100%; }

.form-group { margin-bottom: 0.9rem; }
.form-group label {
  display: block;
  margin-bottom: 0.35rem;
  color: var(--text-muted);
  font-size: 0.9rem;
}
.form-control {
  width: 100%;
  background: #10141c;
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 0.7rem 0.8rem;
}
.form-control:focus {
  outline: none;
  border-color: rgba(212, 160, 23, 0.7);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.form-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
}
.checkbox {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-muted);
  font-size: 0.92rem;
}

.auth-page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1.5rem;
}
.auth-card {
  width: min(440px, 100%);
}
.auth-card .brand {
  border: 0;
  text-align: center;
  font-size: 1.8rem;
  padding-bottom: 0.25rem;
}
.auth-card h2 {
  text-align: center;
  margin: 0.2rem 0 1.2rem;
  font-weight: 600;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 0.9rem;
}

.card-tile {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  cursor: pointer;
  transition: transform .15s ease, border-color .15s ease;
}
.card-tile:hover {
  transform: translateY(-2px);
  border-color: rgba(212, 160, 23, 0.45);
}
.card-tile img {
  width: 100%;
  aspect-ratio: 59 / 86;
  object-fit: cover;
  background: #0b0e14;
}
.card-tile .meta {
  padding: 0.65rem 0.7rem 0.8rem;
}
.card-tile .name {
  font-size: 0.88rem;
  font-weight: 650;
  line-height: 1.25;
  margin-bottom: 0.25rem;
}
.card-tile .type {
  color: var(--text-muted);
  font-size: 0.78rem;
}
.badge {
  display: inline-block;
  margin-top: 0.4rem;
  font-size: 0.72rem;
  padding: 0.18rem 0.45rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: #f0d27a;
  border: 1px solid rgba(212, 160, 23, 0.25);
}

.search-bar {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.6rem;
  margin-bottom: 1rem;
}

.filters {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.6rem;
  margin-bottom: 1rem;
}

.pagination {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  justify-content: center;
  margin-top: 1.25rem;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  z-index: 50;
}
.modal-backdrop.open { display: flex; }
.modal {
  width: min(820px, 100%);
  max-height: min(90vh, 900px);
  overflow: auto;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow);
}
.modal-header {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
  padding: 1rem 1.1rem;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: var(--bg-panel);
}
.modal-body {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 1rem;
  padding: 1.1rem;
}
.modal-body img {
  width: 100%;
  border-radius: 8px;
  border: 1px solid var(--border);
}
.detail-list {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 0.35rem 0.75rem;
  font-size: 0.92rem;
}
.detail-list dt { color: var(--text-muted); }
.detail-list dd { margin: 0; }
.sets-list {
  margin-top: 1rem;
  max-height: 180px;
  overflow: auto;
  border: 1px solid var(--border);
  border-radius: 8px;
}
.sets-list table { width: 100%; border-collapse: collapse; font-size: 0.85rem; }
.sets-list th, .sets-list td { padding: 0.45rem 0.6rem; border-bottom: 1px solid var(--border); text-align: left; }
.sets-list th { color: var(--text-muted); font-weight: 600; }

.empty-state {
  text-align: center;
  padding: 2.5rem 1rem;
  color: var(--text-muted);
}

.toast-container {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  z-index: 80;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.toast {
  min-width: 240px;
  max-width: 360px;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 8px;
  padding: 0.75rem 0.9rem;
  box-shadow: var(--shadow);
}

@media (max-width: 980px) {
  .stats-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .filters { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .modal-body { grid-template-columns: 160px 1fr; }
}

.folder-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 0.9rem;
}
.folder-card h3 {
  margin: 0;
  font-size: 1.05rem;
}
.folder-card-top {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  align-items: flex-start;
  margin-bottom: 0.5rem;
}
.folder-stats {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}
.folder-stats strong {
  display: block;
  font-size: 1.2rem;
  color: var(--accent);
  font-family: var(--font-display);
}
.badge-muted {
  background: rgba(154, 160, 166, 0.12);
  color: var(--text-muted);
  border-color: var(--border);
}
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}
.data-table th,
.data-table td {
  padding: 0.65rem 0.55rem;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: middle;
}
.data-table th {
  color: var(--text-muted);
  font-weight: 600;
}
.catalog-results {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  max-height: 260px;
  overflow: auto;
  margin-top: 0.5rem;
}
.catalog-result {
  display: flex;
  gap: 0.7rem;
  align-items: center;
  width: 100%;
  text-align: left;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  padding: 0.45rem 0.6rem;
  cursor: pointer;
}
.catalog-result:hover {
  border-color: rgba(212, 160, 23, 0.45);
  background: var(--bg-hover);
}
.folder-item-tile .btn {
  padding: 0.4rem 0.55rem;
  font-size: 0.8rem;
}

@media (max-width: 800px) {
  .app-shell { grid-template-columns: 1fr; }
  .sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    width: min(280px, 84vw);
    transform: translateX(-105%);
    transition: transform .2s ease;
    z-index: 40;
  }
  .sidebar.open { transform: translateX(0); }
  .menu-toggle { display: inline-flex; }
  .main { padding: 1rem; }
  .form-row { grid-template-columns: 1fr; }
  .modal-body { grid-template-columns: 1fr; }
  .sidebar-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.5);
    z-index: 30;
  }
  .sidebar-backdrop.open { display: block; }
}