:root {
  --bg-base: #0b0f19;
  --bg-card: rgba(18, 24, 38, 0.85);
  --bg-hover: rgba(30, 41, 59, 0.8);
  --border: rgba(255, 255, 255, 0.08);
  --border-focus: #3b82f6;
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --accent: #06b6d4;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-family);
  background: var(--bg-base);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

/* Glassmorphism utilities */
.glass {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border);
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-fade {
  animation: fadeIn 0.25s ease-out forwards;
}

/* Navbar */
header.app-header {
  height: 64px;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(11, 15, 25, 0.9);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-weight: 700;
  font-size: 19px;
  color: #fff;
  letter-spacing: -0.5px;
}

.brand-badge {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: white;
  font-size: 11px;
  font-weight: 800;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  font-size: 13.5px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.15s ease;
  text-decoration: none;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-primary:hover {
  background: var(--primary-hover);
  box-shadow: 0 0 15px rgba(59, 130, 246, 0.4);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--border);
  color: var(--text-main);
}
.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
}

.btn-danger {
  background: rgba(239, 68, 68, 0.15);
  border-color: rgba(239, 68, 68, 0.3);
  color: var(--danger);
}
.btn-danger:hover {
  background: var(--danger);
  color: #fff;
}

.btn-sm {
  padding: 5px 10px;
  font-size: 12px;
}

/* Login Card */
.login-wrapper {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: radial-gradient(circle at 50% 20%, rgba(59, 130, 246, 0.12) 0%, transparent 60%);
}

.login-card {
  width: 100%;
  max-width: 420px;
  padding: 36px 32px;
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
}

.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  font-size: 12.5px;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.form-control {
  width: 100%;
  padding: 10px 14px;
  background: rgba(15, 23, 42, 0.7);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: #fff;
  font-size: 14px;
  outline: none;
  transition: border-color 0.15s ease;
}

.form-control:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
}

/* App Main Layout */
.app-container {
  display: flex;
  flex: 1;
  overflow: hidden;
  height: calc(100vh - 64px);
}

/* Sidebar */
.app-sidebar {
  width: 280px;
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 18px 14px;
  gap: 16px;
  flex-shrink: 0;
  overflow-y: auto;
}

.quota-widget {
  padding: 14px;
  border-radius: var(--radius-md);
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border);
}

.quota-title {
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  font-weight: 600;
  margin-bottom: 8px;
  display: flex;
  justify-content: space-between;
}

.progress-bar-bg {
  height: 8px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 99px;
  overflow: hidden;
  margin: 8px 0;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 99px;
  transition: width 0.3s ease;
}

.quota-details {
  font-size: 12px;
  color: var(--text-dim);
  display: flex;
  justify-content: space-between;
}

/* Folder Tree */
.tree-section-title {
  font-size: 11px;
  text-transform: uppercase;
  color: var(--text-dim);
  font-weight: 700;
  letter-spacing: 0.5px;
  padding: 0 8px;
  margin-bottom: 4px;
}

.tree-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  font-size: 13.5px;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s ease;
  user-select: none;
}

.tree-item:hover {
  background: var(--bg-hover);
  color: #fff;
}

.tree-item.active {
  background: rgba(59, 130, 246, 0.15);
  color: var(--primary);
  font-weight: 600;
}

/* Content Area */
.app-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  padding: 24px 32px;
}

.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 12px;
}

.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-muted);
}

.breadcrumbs span.current {
  color: #fff;
  font-weight: 600;
}

.toolbar-buttons {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* Dropzone */
.dropzone {
  border: 2px dashed rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-md);
  padding: 32px;
  text-align: center;
  margin-bottom: 24px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.dropzone:hover, .dropzone.drag-active {
  border-color: var(--primary);
  background: rgba(59, 130, 246, 0.05);
}

.dropzone i {
  font-size: 32px;
  color: var(--primary);
  margin-bottom: 10px;
}

/* Grid & Tables */
.folders-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
  gap: 14px;
  margin-bottom: 24px;
}

.folder-card {
  padding: 14px 16px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  transition: all 0.15s ease;
}

.folder-card:hover {
  background: var(--bg-hover);
  border-color: rgba(255, 255, 255, 0.15);
}

.folder-left {
  display: flex;
  align-items: center;
  gap: 12px;
  overflow: hidden;
}

.folder-name {
  font-size: 13.5px;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Files Table */
.table-card {
  border-radius: var(--radius-md);
  overflow: hidden;
}

table.files-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 13.5px;
}

table.files-table th {
  padding: 12px 16px;
  background: rgba(15, 23, 42, 0.6);
  color: var(--text-dim);
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 1px solid var(--border);
}

table.files-table td {
  padding: 12px 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  vertical-align: middle;
}

table.files-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

.file-name-cell {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 500;
}

.file-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Modals */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(6px);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal-card {
  width: 100%;
  max-width: 540px;
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.7);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.modal-title {
  font-size: 17px;
  font-weight: 600;
}

.modal-close {
  background: transparent;
  border: none;
  color: var(--text-dim);
  font-size: 18px;
  cursor: pointer;
}

/* Metric Cards for Super Admin */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.metric-card {
  padding: 20px;
  border-radius: var(--radius-md);
}

.metric-title {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 600;
  margin-bottom: 8px;
}

.metric-value {
  font-size: 26px;
  font-weight: 700;
  color: #fff;
}

.badge {
  padding: 3px 8px;
  border-radius: 99px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
}

.badge-success { background: rgba(16, 185, 129, 0.15); color: var(--success); }
.badge-warning { background: rgba(245, 158, 11, 0.15); color: var(--warning); }
.badge-danger  { background: rgba(239, 68, 68, 0.15); color: var(--danger); }