/* ===== CloudDisk Design System ===== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
  /* Colors - Dark Theme */
  --bg-primary: #0a0e17;
  --bg-secondary: #111827;
  --bg-card: rgba(17, 24, 39, 0.8);
  --bg-card-hover: rgba(31, 41, 55, 0.9);
  --bg-glass: rgba(255, 255, 255, 0.05);
  --bg-input: rgba(255, 255, 255, 0.07);

  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --accent: #6366f1;
  --accent-light: #818cf8;
  --accent-dark: #4f46e5;
  --accent-glow: rgba(99, 102, 241, 0.3);

  --success: #22c55e;
  --warning: #f59e0b;
  --danger: #ef4444;
  --danger-dark: #dc2626;
  --info: #3b82f6;

  --border: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(255, 255, 255, 0.15);

  /* Sizing */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 20px var(--accent-glow);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
}

/* ===== Animated Background ===== */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(99, 102, 241, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(139, 92, 246, 0.06) 0%, transparent 50%),
    radial-gradient(ellipse at 40% 80%, rgba(59, 130, 246, 0.05) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}

/* ===== Glass Card ===== */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 2rem;
  transition: all 0.3s ease;
}

.card:hover {
  border-color: var(--border-hover);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: white;
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 0 30px var(--accent-glow);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background: var(--bg-glass);
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: var(--bg-input);
  border-color: var(--border-hover);
}

.btn-danger {
  background: linear-gradient(135deg, var(--danger), var(--danger-dark));
  color: white;
}

.btn-danger:hover {
  transform: translateY(-1px);
  box-shadow: 0 0 15px rgba(239, 68, 68, 0.3);
}

.btn-sm {
  padding: 6px 14px;
  font-size: 0.8rem;
}

.btn-icon {
  padding: 8px;
  min-width: 36px;
  height: 36px;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

/* ===== Inputs ===== */
.input-group {
  margin-bottom: 1.25rem;
}

.input-group label {
  display: block;
  margin-bottom: 6px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.input {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.9rem;
  transition: all 0.2s ease;
  outline: none;
}

.input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.input::placeholder {
  color: var(--text-muted);
}

/* Password Toggle */
.input-password {
  position: relative;
  display: flex;
  align-items: center;
}

.input-password .input {
  padding-right: 44px;
}

.pwd-toggle {
  position: absolute;
  right: 8px;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.1rem;
  cursor: pointer;
  padding: 4px 6px;
  border-radius: 4px;
  transition: all 0.2s ease;
  line-height: 1;
}

.pwd-toggle:hover {
  color: var(--text-primary);
  background: var(--bg-glass);
}

.pwd-toggle.active {
  color: var(--accent-light);
}

/* ===== Auth Page ===== */
.auth-container {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 2rem;
  position: relative;
  z-index: 1;
}

.auth-card {
  width: 100%;
  max-width: 420px;
}

.auth-logo {
  text-align: center;
  margin-bottom: 2rem;
}

.auth-logo .logo-icon {
  font-size: 3rem;
  margin-bottom: 0.5rem;
  display: block;
}

.auth-logo h1 {
  font-size: 1.75rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent-light), var(--info));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.auth-logo p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: 4px;
}

.auth-tabs {
  display: flex;
  gap: 0;
  margin-bottom: 1.5rem;
  background: var(--bg-glass);
  border-radius: var(--radius-sm);
  padding: 4px;
}

.auth-tab {
  flex: 1;
  padding: 10px;
  text-align: center;
  border: none;
  background: none;
  color: var(--text-muted);
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  border-radius: 6px;
  transition: all 0.2s ease;
}

.auth-tab.active {
  background: var(--accent);
  color: white;
}

.auth-form {
  display: none;
}

.auth-form.active {
  display: block;
}

.auth-form .btn-primary {
  width: 100%;
  padding: 12px;
  font-size: 1rem;
  margin-top: 0.5rem;
}

/* ===== Dashboard Layout ===== */
.app-layout {
  min-height: 100vh;
  position: relative;
  z-index: 1;
}

/* App Header */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 2rem;
  background: rgba(10, 14, 23, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header-left .logo-icon {
  font-size: 1.5rem;
}

.header-left h1 {
  font-size: 1.2rem;
  font-weight: 600;
  background: linear-gradient(135deg, var(--accent-light), var(--info));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.user-info {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
  font-size: 0.85rem;
}

.user-info .avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--info));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 0.85rem;
  color: white;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge-admin {
  background: rgba(99, 102, 241, 0.2);
  color: var(--accent-light);
  border: 1px solid rgba(99, 102, 241, 0.3);
}

/* ===== Dashboard Content ===== */
.dashboard-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

/* Storage Bar */
.storage-bar-container {
  margin-bottom: 2rem;
}

.storage-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.storage-bar {
  height: 8px;
  background: var(--bg-glass);
  border-radius: 4px;
  overflow: hidden;
}

.storage-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--info));
  border-radius: 4px;
  transition: width 0.5s ease;
}

.storage-fill.warning {
  background: linear-gradient(90deg, var(--warning), #ea580c);
}

.storage-fill.danger {
  background: linear-gradient(90deg, var(--danger), var(--danger-dark));
}

/* ===== Upload Zone ===== */
.upload-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  text-align: center;
  cursor: pointer;
  transition: all 0.3s ease;
  margin-bottom: 2rem;
  position: relative;
  overflow: hidden;
}

.upload-zone::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.03), rgba(59, 130, 246, 0.03));
  opacity: 0;
  transition: opacity 0.3s ease;
}

.upload-zone:hover,
.upload-zone.dragover {
  border-color: var(--accent);
  background: rgba(99, 102, 241, 0.05);
}

.upload-zone:hover::before,
.upload-zone.dragover::before {
  opacity: 1;
}

.upload-zone.dragover {
  transform: scale(1.01);
  box-shadow: var(--shadow-glow);
}

.upload-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  opacity: 0.7;
}

.upload-text h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.upload-text p {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.upload-input {
  display: none;
}

/* Upload Progress */
.upload-progress {
  display: none;
  margin-bottom: 1.5rem;
}

.upload-progress.active {
  display: block;
}

.progress-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.progress-item .file-name {
  flex: 1;
  font-size: 0.85rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.progress-item .progress-bar {
  width: 120px;
  height: 6px;
  background: var(--bg-glass);
  border-radius: 3px;
  overflow: hidden;
}

.progress-item .progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  border-radius: 3px;
  transition: width 0.2s ease;
}

.progress-item .progress-text {
  font-size: 0.8rem;
  color: var(--text-muted);
  min-width: 40px;
  text-align: right;
}

/* ===== File List ===== */
.file-list-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.file-list-header h2 {
  font-size: 1.1rem;
  font-weight: 600;
}

.file-count {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.file-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.file-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 18px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: all 0.2s ease;
}

.file-item:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  transform: translateX(4px);
}

.file-icon {
  font-size: 1.5rem;
  min-width: 36px;
  text-align: center;
}

.file-info {
  flex: 1;
  min-width: 0;
}

.file-name {
  font-weight: 500;
  font-size: 0.9rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.file-meta {
  display: flex;
  gap: 16px;
  margin-top: 4px;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.file-actions {
  display: flex;
  gap: 6px;
}

.file-empty {
  text-align: center;
  padding: 4rem 2rem;
  color: var(--text-muted);
}

.file-empty .empty-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  opacity: 0.5;
}

.file-empty p {
  font-size: 0.95rem;
}

/* ===== Admin Panel ===== */
.admin-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.stat-card {
  padding: 1.5rem;
  text-align: center;
}

.stat-value {
  font-size: 2rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent-light), var(--info));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 4px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* User Table */
.user-table {
  width: 100%;
  border-collapse: collapse;
}

.user-table thead th {
  text-align: left;
  padding: 12px 16px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 1px solid var(--border);
}

.user-table tbody td {
  padding: 14px 16px;
  font-size: 0.85rem;
  border-bottom: 1px solid var(--border);
}

.user-table tbody tr:hover {
  background: var(--bg-glass);
}

.user-table tbody tr:last-child td {
  border-bottom: none;
}

/* ===== Modal ===== */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  z-index: 1000;
  align-items: center;
  justify-content: center;
}

.modal-overlay.active {
  display: flex;
}

.modal {
  width: 90%;
  max-width: 480px;
  max-height: 80vh;
  overflow-y: auto;
}

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

.modal-header h3 {
  font-size: 1.1rem;
  font-weight: 600;
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 4px;
  line-height: 1;
}

.modal-close:hover {
  color: var(--text-primary);
}

.modal-actions {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
  margin-top: 1.5rem;
}

/* ===== Toast ===== */
.toast-container {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow-md);
  animation: slideInRight 0.3s ease forwards;
  display: flex;
  align-items: center;
  gap: 8px;
  max-width: 360px;
}

.toast-success {
  background: rgba(34, 197, 94, 0.15);
  border: 1px solid rgba(34, 197, 94, 0.3);
  color: var(--success);
}

.toast-error {
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: var(--danger);
}

.toast-info {
  background: rgba(59, 130, 246, 0.15);
  border: 1px solid rgba(59, 130, 246, 0.3);
  color: var(--info);
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(100px);
  }

  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes fadeOut {
  from {
    opacity: 1;
  }

  to {
    opacity: 0;
    transform: translateX(100px);
  }
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .app-header {
    padding: 0.75rem 1rem;
  }

  .dashboard-content {
    padding: 1rem;
  }

  .file-item {
    padding: 12px;
    gap: 10px;
  }

  .file-meta {
    flex-wrap: wrap;
    gap: 8px;
  }

  .upload-zone {
    padding: 1.5rem;
  }

  .admin-stats {
    grid-template-columns: 1fr 1fr;
  }

  .user-table {
    font-size: 0.8rem;
  }

  .header-left h1 {
    display: none;
  }
}

/* ===== Nav Tabs ===== */
.nav-tabs {
  display: flex;
  gap: 4px;
  background: var(--bg-glass);
  padding: 4px;
  border-radius: var(--radius-sm);
}

.nav-tab {
  padding: 8px 16px;
  border: none;
  background: none;
  color: var(--text-muted);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  border-radius: 6px;
  transition: all 0.2s ease;
}

.nav-tab.active {
  background: var(--accent);
  color: white;
}

.nav-tab:hover:not(.active) {
  color: var(--text-primary);
  background: var(--bg-input);
}

/* ===== Page Sections ===== */
.page-section {
  display: none;
}

.page-section.active {
  display: block;
}

/* ===== Loading Spinner ===== */
.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}