/* Modern Aesthetic White-Background Design System */
:root {
  --bg-main: #f8fafc;
  --bg-card: #ffffff;
  --bg-hover: #f1f5f9;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --accent-color: #2563eb;
  --accent-light: #eff6ff;
  --accent-hover: #1d4ed8;
  --border-color: #e2e8f0;
  --border-hover: #cbd5e1;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  --font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

body {
  font-family: var(--font-family);
  background-color: var(--bg-main);
  color: var(--text-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

/* App Container Layout */
.app-container {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: 280px;
  background: var(--bg-card);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  padding: 1.5rem;
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 100;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 2rem;
  padding: 0.25rem 0.5rem;
}

.brand-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, #2563eb, #3b82f6);
  color: white;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  font-weight: 700;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}

.brand-text h1 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.brand-text span {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 500;
}

.nav-menu {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  list-style: none;
  flex: 1;
}

.nav-item button {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.75rem 1rem;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 0.925rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: left;
}

.nav-item button:hover {
  background-color: var(--bg-hover);
  color: var(--text-primary);
}

.nav-item button.active {
  background-color: var(--accent-light);
  color: var(--accent-color);
}

.nav-item button svg {
  width: 20px;
  height: 20px;
}

/* Storage Widget in Sidebar */
.storage-widget {
  background: #f8fafc;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin-top: auto;
}

.storage-title {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.storage-progress-bg {
  width: 100%;
  height: 8px;
  background: #e2e8f0;
  border-radius: var(--radius-full);
  overflow: hidden;
  margin-bottom: 0.5rem;
}

.storage-progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #2563eb, #3b82f6);
  border-radius: var(--radius-full);
  transition: width 0.4s ease;
}

.storage-progress-fill.warning {
  background: linear-gradient(90deg, #f59e0b, #d97706);
}

.storage-progress-fill.danger {
  background: linear-gradient(90deg, #ef4444, #dc2626);
}

.storage-text {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* Main Content Area */
.main-wrapper {
  margin-left: 280px;
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

/* Top Navbar */
.top-header {
  height: 72px;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
  position: sticky;
  top: 0;
  z-index: 90;
}

.search-box {
  position: relative;
  width: 380px;
}

.search-box svg {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  color: var(--text-muted);
}

.search-box input {
  width: 100%;
  padding: 0.65rem 1rem 0.65rem 2.6rem;
  background: #f8fafc;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  font-family: inherit;
  font-size: 0.9rem;
  color: var(--text-primary);
  outline: none;
  transition: all 0.2s ease;
}

.search-box input:focus {
  background: #ffffff;
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.badge-tailscale {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: #f0fdf4;
  color: #166534;
  border: 1px solid #bbf7d0;
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background: #22c55e;
  border-radius: 50%;
  box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.25);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(34, 197, 94, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(34, 197, 94, 0); }
}

.user-profile {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--bg-card);
  padding: 0.4rem 0.75rem 0.4rem 0.4rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-color);
}

.user-avatar {
  width: 34px;
  height: 34px;
  background: #e0e7ff;
  color: var(--accent-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
}

.user-info {
  display: flex;
  flex-direction: column;
}

.user-name {
  font-size: 0.85rem;
  font-weight: 700;
  line-height: 1.2;
}

.user-role-pill {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
}

/* Page Body Container */
.content-body {
  padding: 2rem;
  flex: 1;
}

/* Upload Hero Area */
.upload-zone {
  background: var(--bg-card);
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  text-align: center;
  cursor: pointer;
  transition: all 0.25s ease;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-sm);
  position: relative;
}

.upload-zone:hover, .upload-zone.drag-over {
  border-color: var(--accent-color);
  background-color: var(--accent-light);
}

.upload-icon-wrapper {
  width: 64px;
  height: 64px;
  background: var(--accent-light);
  color: var(--accent-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
}

.upload-icon-wrapper svg {
  width: 32px;
  height: 32px;
}

.upload-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
}

.upload-subtitle {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
}

.btn-upload {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--accent-color);
  color: white;
  padding: 0.7rem 1.5rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.9rem;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}

.btn-upload:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

/* Upload Progress Modal / Floating Panel */
.upload-progress-panel {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 380px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 1.25rem;
  z-index: 200;
  display: none;
}

.upload-progress-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
}

.upload-progress-title {
  font-size: 0.95rem;
  font-weight: 700;
}

.upload-speed-badge {
  font-size: 0.75rem;
  background: #f1f5f9;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
  font-weight: 600;
  color: var(--accent-color);
}

/* Controls Header (Filter, Category, View Mode) */
.controls-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.category-tabs {
  display: flex;
  gap: 0.5rem;
  background: var(--bg-card);
  padding: 0.35rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.tab-btn {
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  border: none;
  background: transparent;
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
}

.tab-btn:hover {
  color: var(--text-primary);
}

.tab-btn.active {
  background: var(--bg-main);
  color: var(--accent-color);
  box-shadow: var(--shadow-sm);
}

.view-controls {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.select-custom {
  padding: 0.55rem 1rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-primary);
  outline: none;
  cursor: pointer;
}

/* Files Grid & Cards */
.file-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1.25rem;
}

.file-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem;
  transition: all 0.25s ease;
  position: relative;
  display: flex;
  flex-direction: column;
}

.file-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.file-card-preview {
  height: 140px;
  background: #f8fafc;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 0.75rem;
  overflow: hidden;
  position: relative;
}

.file-card-preview img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

.file-card-preview video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

.file-icon-large {
  width: 48px;
  height: 48px;
  color: var(--text-muted);
}

.file-card-details {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  flex: 1;
}

.file-name {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.file-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.775rem;
  color: var(--text-muted);
  font-weight: 500;
}

.file-actions {
  display: flex;
  gap: 0.35rem;
  margin-top: 0.75rem;
}

.btn-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-icon:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.btn-icon.delete:hover {
  background: #fef2f2;
  color: #ef4444;
  border-color: #fecaca;
}

/* Modals */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(15, 23, 42, 0.4);
  backdrop-filter: blur(4px);
  z-index: 300;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: all 0.25s ease;
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 2rem;
  width: 100%;
  max-width: 520px;
  box-shadow: var(--shadow-lg);
  transform: scale(0.95);
  transition: transform 0.25s ease;
}

.modal-overlay.active .modal-card {
  transform: scale(1);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.modal-title {
  font-size: 1.25rem;
  font-weight: 700;
}

/* Media Lightbox Modal */
.lightbox-modal {
  max-width: 90vw;
  max-height: 90vh;
  width: auto;
  background: #ffffff;
  padding: 1.5rem;
}

.lightbox-media {
  max-width: 100%;
  max-height: 70vh;
  object-fit: contain;
  border-radius: var(--radius-md);
  margin: 0 auto;
  display: block;
}

/* Form controls */
.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.form-input {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 0.925rem;
  outline: none;
  transition: all 0.2s ease;
}

.form-input:focus {
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.btn-primary {
  width: 100%;
  padding: 0.8rem;
  background: var(--accent-color);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-primary:hover {
  background: var(--accent-hover);
}

/* Admin Users Table */
.admin-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1rem;
  background: var(--bg-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-color);
}

.admin-table th, .admin-table td {
  padding: 0.85rem 1.25rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.875rem;
}

.admin-table th {
  background: #f8fafc;
  font-weight: 700;
  color: var(--text-secondary);
}

/* Responsive adjustments */
@media (max-width: 900px) {
  .sidebar {
    width: 80px;
    padding: 1rem 0.5rem;
  }
  .brand-text, .nav-item button span, .storage-widget {
    display: none;
  }
  .main-wrapper {
    margin-left: 80px;
  }
}