/* ===================================================================
   Vault Web App — Dark Theme
   =================================================================== */

:root {
  --bg-primary:    #0d1117;
  --bg-secondary:  #161b22;
  --bg-tertiary:   #21262d;
  --border:        #30363d;
  --text-primary:  #e6edf3;
  --text-secondary:#8b949e;
  --text-muted:    #6e7681;
  --accent:        #58a6ff;
  --accent-hover:  #79c0ff;
  --danger:        #f85149;
  --danger-hover:  #ff6b63;
  --success:       #3fb950;
  --warning:       #d29922;
  --radius:        8px;
  --radius-lg:     12px;
  --shadow:        0 2px 8px rgba(0,0,0,0.3);
  --transition:    0.2s ease;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  min-height: 100vh;
}

/* ------------------------------------------------------------------ */
/* Views                                                               */
/* ------------------------------------------------------------------ */
.view { display: none; }
.view.active { display: flex; flex-direction: column; min-height: 100vh; }

/* ------------------------------------------------------------------ */
/* Auth View                                                           */
/* ------------------------------------------------------------------ */
#auth-view.active {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.auth-container {
  width: 100%;
  max-width: 400px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
}

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

.auth-logo {
  width: 48px;
  height: 48px;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.auth-header h1 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.auth-header p {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.auth-tabs {
  display: flex;
  gap: 0;
  margin-bottom: 1.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.auth-tab {
  flex: 1;
  padding: 0.625rem;
  border: none;
  background: var(--bg-primary);
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 0.875rem;
  font-weight: 500;
  transition: var(--transition);
}

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

.auth-form { display: none; }
.auth-form.active { display: block; }

/* ------------------------------------------------------------------ */
/* Forms & Fields                                                      */
/* ------------------------------------------------------------------ */
.field {
  margin-bottom: 1rem;
}

.field label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 0.375rem;
}

.field input {
  width: 100%;
  padding: 0.625rem 0.75rem;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-size: 0.9375rem;
  transition: border-color var(--transition);
}

.field input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(88,166,255,0.15);
}

.form-error {
  color: var(--danger);
  font-size: 0.8125rem;
  margin-top: 0.5rem;
  min-height: 1.25rem;
}

/* ------------------------------------------------------------------ */
/* Buttons                                                             */
/* ------------------------------------------------------------------ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.5rem 1rem;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover:not(:disabled) { background: var(--accent-hover); }

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border-color: var(--border);
}
.btn-secondary:hover:not(:disabled) { background: var(--border); }

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
}
.btn-ghost:hover:not(:disabled) { color: var(--text-primary); background: var(--bg-tertiary); }

.btn-danger {
  background: var(--danger);
  color: #fff;
}
.btn-danger:hover:not(:disabled) { background: var(--danger-hover); }

.btn-full { width: 100%; justify-content: center; }

.btn-icon {
  padding: 0.375rem;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  border-radius: var(--radius);
}
.btn-icon:hover { color: var(--danger); background: var(--bg-tertiary); }

/* ------------------------------------------------------------------ */
/* Top Bar                                                             */
/* ------------------------------------------------------------------ */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.5rem;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  gap: 1rem;
}

.topbar-left, .topbar-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.topbar-icon {
  width: 24px;
  height: 24px;
  color: var(--accent);
}

.topbar h2 {
  font-size: 1.125rem;
  font-weight: 600;
}

.topbar-user {
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

/* ------------------------------------------------------------------ */
/* Toolbar                                                             */
/* ------------------------------------------------------------------ */
.toolbar {
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.browser-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.625rem 1.5rem;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  gap: 1rem;
  flex-wrap: wrap;
}

.sort-select {
  padding: 0.5rem 0.75rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-size: 0.875rem;
  cursor: pointer;
  min-width: 90px;
}

.sort-select:focus {
  outline: none;
  border-color: var(--accent);
}

.compress-label {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.8125rem;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-tertiary);
  user-select: none;
  transition: var(--transition);
  white-space: nowrap;
}

.compress-label:hover {
  border-color: var(--accent);
}

.compress-label input[type="checkbox"] {
  accent-color: var(--accent);
}

.browser-actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

/* ------------------------------------------------------------------ */
/* Breadcrumb                                                          */
/* ------------------------------------------------------------------ */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  flex-wrap: wrap;
}

.breadcrumb-item {
  font-size: 0.875rem;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius);
  transition: var(--transition);
}

.breadcrumb-item:hover { color: var(--text-primary); background: var(--bg-tertiary); }
.breadcrumb-item:last-child { color: var(--text-primary); font-weight: 500; cursor: default; }
.breadcrumb-item:last-child:hover { background: transparent; }

.breadcrumb-sep {
  color: var(--text-muted);
  font-size: 0.75rem;
  user-select: none;
}

/* ------------------------------------------------------------------ */
/* Main Content                                                        */
/* ------------------------------------------------------------------ */
.main-content {
  flex: 1;
  padding: 1.5rem;
  overflow-y: auto;
}

/* ------------------------------------------------------------------ */
/* Vaults Grid                                                         */
/* ------------------------------------------------------------------ */
.vaults-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1rem;
}

.vault-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
}

.vault-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow);
}

.vault-card-name {
  font-weight: 600;
  margin-bottom: 0.375rem;
}

.vault-card-meta {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}

.vault-card-date {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.vault-card-delete {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  opacity: 0;
  transition: opacity var(--transition);
}

.vault-card:hover .vault-card-delete { opacity: 1; }

/* ------------------------------------------------------------------ */
/* Items Grid                                                          */
/* ------------------------------------------------------------------ */
.items-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 0.75rem;
}

.item-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
}

.item-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow);
}

.item-thumb {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  background: var(--bg-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
}

.item-thumb svg {
  width: 40px;
  height: 40px;
}

.item-thumb.folder-thumb {
  color: var(--warning);
}

.item-info {
  padding: 0.5rem 0.625rem;
}

.item-name {
  font-size: 0.8125rem;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.item-meta {
  font-size: 0.6875rem;
  color: var(--text-muted);
  margin-top: 0.125rem;
}

.item-card-delete {
  position: absolute;
  top: 0.25rem;
  right: 0.25rem;
  opacity: 0;
  transition: opacity var(--transition);
  z-index: 2;
}

.item-card:hover .item-card-delete { opacity: 1; }

/* ------------------------------------------------------------------ */
/* Drop Zone                                                           */
/* ------------------------------------------------------------------ */
.drop-zone {
  margin: 0.75rem 1.5rem;
  padding: 2rem;
  border: 2px dashed var(--border);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: var(--transition);
}

.drop-zone.drag-over {
  border-color: var(--accent);
  background: rgba(88,166,255,0.08);
}

.drop-zone-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.drop-icon {
  width: 36px;
  height: 36px;
  color: var(--text-muted);
}

.drop-zone p {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.drop-hint {
  color: var(--text-muted) !important;
  font-size: 0.75rem !important;
}

/* ------------------------------------------------------------------ */
/* Empty State                                                         */
/* ------------------------------------------------------------------ */
.empty-state {
  grid-column: 1 / -1;
  text-align: center;
  color: var(--text-muted);
  padding: 3rem 1rem;
  font-size: 0.9375rem;
}

/* ------------------------------------------------------------------ */
/* Modal                                                               */
/* ------------------------------------------------------------------ */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 100;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

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

.modal {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  width: 100%;
  max-width: 400px;
}

.modal-sm { max-width: 320px; }

.modal h3 {
  margin-bottom: 1rem;
  font-size: 1.0625rem;
}

.modal p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  font-size: 0.875rem;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
  margin-top: 1rem;
}

/* ------------------------------------------------------------------ */
/* Toast                                                               */
/* ------------------------------------------------------------------ */
.toast-container {
  position: fixed;
  bottom: 1rem;
  right: 1rem;
  z-index: 200;
  display: flex;
  flex-direction: column-reverse;
  gap: 0.5rem;
}

.toast {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  font-size: 0.875rem;
  box-shadow: var(--shadow);
  animation: slideIn 0.3s ease;
  max-width: 320px;
}

.toast.error { border-color: var(--danger); }
.toast.success { border-color: var(--success); }

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* ------------------------------------------------------------------ */
/* Upload Progress                                                     */
/* ------------------------------------------------------------------ */
.upload-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 150;
  display: flex;
  align-items: center;
  justify-content: center;
}

.upload-progress-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  text-align: center;
  min-width: 280px;
}

.upload-progress-card h4 {
  margin-bottom: 0.75rem;
}

.progress-bar {
  height: 6px;
  background: var(--bg-tertiary);
  border-radius: 3px;
  overflow: hidden;
  margin-top: 0.5rem;
}

.progress-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 3px;
  transition: width 0.3s ease;
}

/* ------------------------------------------------------------------ */
/* File Viewer Overlay                                                  */
/* ------------------------------------------------------------------ */
.viewer-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.92);
  z-index: 300;
  align-items: center;
  justify-content: center;
}

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

.viewer-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  z-index: 10;
  background: rgba(255,255,255,0.1);
  border: none;
  color: #fff;
  font-size: 1.75rem;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
}

.viewer-close:hover {
  background: rgba(255,255,255,0.25);
}

.viewer-download {
  position: absolute;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 10;
}

.viewer-content {
  max-width: 95vw;
  max-height: 90vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.viewer-content img {
  max-width: 95vw;
  max-height: 90vh;
  object-fit: contain;
  border-radius: 4px;
}

.viewer-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
  background: rgba(255,255,255,0.1);
  border: none;
  color: #fff;
  font-size: 2.5rem;
  width: 52px;
  height: 80px;
  border-radius: 6px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
}

.viewer-nav:hover {
  background: rgba(255,255,255,0.25);
}

.viewer-prev { left: 1rem; }
.viewer-next { right: 1rem; }

.viewer-content video {
  max-width: 95vw;
  max-height: 90vh;
  border-radius: 4px;
  outline: none;
}

/* ------------------------------------------------------------------ */
/* Responsive                                                          */
/* ------------------------------------------------------------------ */
@media (max-width: 640px) {
  .browser-toolbar {
    flex-direction: column;
    align-items: flex-start;
  }

  .browser-actions {
    width: 100%;
  }

  .browser-actions .btn {
    flex: 1;
    justify-content: center;
  }

  .items-grid {
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  }

  .vaults-grid {
    grid-template-columns: 1fr;
  }

  .topbar {
    padding: 0.625rem 1rem;
  }

  .main-content {
    padding: 1rem;
  }
}