/* SimpleCloud Web UI - Vanilla CSS Design System */
:root {
  /* Brand & Accent Colors (Cloud Mail.ru Blue) */
  --color-primary: #0077FF;
  --color-primary-hover: #005fd1;
  --color-primary-light: #e5f2ff;
  --color-primary-subtle: #f0f7ff;

  /* Neutral Backgrounds & Surfaces */
  --color-bg-app: #f5f5f7;
  --color-bg-surface: #ffffff;
  --color-bg-secondary: #f0f1f3;
  --color-bg-hover: #ebedf0;
  
  /* Text & Content Colors */
  --color-text-main: #2c2d2e;
  --color-text-secondary: #818c99;
  --color-text-muted: #99a2ad;
  --color-text-inverse: #ffffff;

  /* Borders & Dividers */
  --color-border: #ebedf0;
  --color-border-dark: #d7d8db;

  /* Functional Status Colors */
  --color-danger: #e64646;
  --color-danger-light: #ffeaea;
  --color-warning: #ff9e00;
  --color-success: #4bb34b;

  /* Typography */
  --font-family-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-family-mono: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;

  /* Font Sizes */
  --font-size-xs: 12px;
  --font-size-sm: 13px;
  --font-size-md: 14px;
  --font-size-lg: 16px;
  --font-size-xl: 18px;
  --font-size-title: 22px;

  /* Layout Dimensions */
  --header-height: 60px;
  --sidebar-width: 240px;
  --border-radius-sm: 6px;
  --border-radius-md: 10px;
  --border-radius-lg: 16px;
  --border-radius-pill: 999px;

  /* Shadows & Depth */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
}

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

body {
  font-family: var(--font-family-base);
  font-size: var(--font-size-md);
  color: var(--color-text-main);
  background-color: var(--color-bg-app);
  height: 100vh;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Main App Layout */
#app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  width: 100vw;
}

/* Header Bar */
#app-header {
  height: var(--header-height);
  background-color: var(--color-bg-surface);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  z-index: 10;
  box-shadow: var(--shadow-sm);
}

.brand-container {
  display: flex;
  align-items: center;
  gap: 10px;
  width: calc(var(--sidebar-width) - 20px);
}

.brand-icon {
  width: 32px;
  height: 32px;
  color: var(--color-primary);
}

.brand-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-text-main);
  letter-spacing: -0.5px;
}

.search-container {
  flex: 1;
  max-width: 540px;
  position: relative;
  margin: 0 20px;
}

.search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-secondary);
  pointer-events: none;
}

#search-input {
  width: 100%;
  padding: 10px 14px 10px 40px;
  background-color: var(--color-bg-secondary);
  border: 1px solid transparent;
  border-radius: var(--border-radius-md);
  font-size: var(--font-size-md);
  color: var(--color-text-main);
  transition: var(--transition-fast);
  outline: none;
}

#search-input:focus {
  background-color: var(--color-bg-surface);
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0, 119, 255, 0.15);
}

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  border-radius: var(--border-radius-pill);
  font-size: var(--font-size-md);
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition-fast);
  text-decoration: none;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
}

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  box-shadow: 0 2px 8px rgba(0, 119, 255, 0.3);
}

.btn-secondary {
  background-color: var(--color-bg-secondary);
  color: var(--color-text-main);
}

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

.btn-outline {
  background-color: transparent;
  border: 1px solid var(--color-border-dark);
  color: var(--color-text-main);
}

.btn-outline:hover {
  background-color: var(--color-bg-hover);
}

.btn-icon {
  padding: 8px;
  border-radius: var(--border-radius-sm);
  background: transparent;
  border: none;
  color: var(--color-text-secondary);
  cursor: pointer;
}

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

.btn-icon.active {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
}

/* User Profile Menu */
.user-profile {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 8px;
  border-radius: var(--border-radius-pill);
  cursor: pointer;
}

.avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: var(--font-size-sm);
}

/* App Body Layout */
.app-body {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* Sidebar */
#app-sidebar {
  width: var(--sidebar-width);
  background-color: var(--color-bg-surface);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 20px 12px;
}

.nav-menu {
  display: flex;
  flex-direction: column;
  gap: 4px;
  list-style: none;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  border-radius: var(--border-radius-md);
  color: var(--color-text-main);
  text-decoration: none;
  font-weight: 500;
  font-size: var(--font-size-md);
  transition: var(--transition-fast);
  cursor: pointer;
}

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

.nav-item.active {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  font-weight: 600;
}

.nav-icon {
  width: 20px;
  height: 20px;
}

/* Quota Container */
#quota-container {
  background-color: var(--color-bg-secondary);
  border-radius: var(--border-radius-md);
  padding: 16px;
  margin-top: auto;
}

.quota-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  font-weight: 500;
}

.quota-progress-track {
  height: 6px;
  background-color: var(--color-border-dark);
  border-radius: var(--border-radius-pill);
  overflow: hidden;
  margin-bottom: 8px;
}

.quota-progress-fill {
  height: 100%;
  background-color: var(--color-primary);
  width: 0%;
  transition: width var(--transition-normal);
}

.quota-progress-fill.warning,
.quota-warning {
  background-color: var(--color-warning);
}

.quota-progress-fill.danger,
.quota-danger {
  background-color: var(--color-danger);
}

/* Auth Modal */
#modal-auth {
  z-index: 200;
}

.auth-error-msg {
  background-color: var(--color-danger-light);
  color: var(--color-danger);
  padding: 10px 14px;
  border-radius: var(--border-radius-sm);
  font-size: var(--font-size-sm);
  margin-bottom: 16px;
}

.quota-text {
  font-size: var(--font-size-xs);
  color: var(--color-text-main);
  font-weight: 600;
}

/* Main Content Workspace */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background-color: var(--color-bg-app);
  padding: 20px 28px;
}

/* Breadcrumbs & Toolbar */
.toolbar-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

#breadcrumbs-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-text-main);
}

.breadcrumb-item {
  color: var(--color-text-secondary);
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition-fast);
}

.breadcrumb-item:hover {
  color: var(--color-primary);
}

.breadcrumb-item.active {
  color: var(--color-text-main);
  cursor: default;
}

.breadcrumb-separator {
  color: var(--color-text-muted);
}

.toolbar-controls {
  display: flex;
  align-items: center;
  gap: 12px;
}

.sort-select {
  padding: 6px 12px;
  border-radius: var(--border-radius-sm);
  border: 1px solid var(--color-border-dark);
  background-color: var(--color-bg-surface);
  font-size: var(--font-size-sm);
  color: var(--color-text-main);
  outline: none;
  cursor: pointer;
}

.view-toggle {
  display: flex;
  background-color: var(--color-bg-secondary);
  padding: 2px;
  border-radius: var(--border-radius-sm);
}

/* Workspace Items Container */
#workspace {
  flex: 1;
  overflow-y: auto;
  padding-right: 4px;
}

/* Grid View Layout */
.file-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 16px;
}

.grid-card {
  background-color: var(--color-bg-surface);
  border-radius: var(--border-radius-md);
  border: 1px solid var(--color-border);
  padding: 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  cursor: pointer;
  transition: var(--transition-fast);
}

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

.grid-card-icon {
  width: 48px;
  height: 48px;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.grid-card-name {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-main);
  text-align: center;
  word-break: break-all;
  max-width: 100%;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.grid-card-meta {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  margin-top: 4px;
}

.card-actions {
  position: absolute;
  top: 8px;
  right: 8px;
  display: flex;
  gap: 4px;
  opacity: 0;
  transition: var(--transition-fast);
}

.grid-card:hover .card-actions {
  opacity: 1;
}

/* List View Layout */
.file-list {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--color-bg-surface);
  border-radius: var(--border-radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.file-list th {
  text-align: left;
  padding: 12px 16px;
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-text-secondary);
  border-bottom: 1px solid var(--color-border);
  background-color: var(--color-bg-secondary);
}

.file-list td {
  padding: 12px 16px;
  font-size: var(--font-size-sm);
  color: var(--color-text-main);
  border-bottom: 1px solid var(--color-border);
}

.file-list tr {
  cursor: pointer;
  transition: var(--transition-fast);
}

.file-list tr:hover {
  background-color: var(--color-primary-subtle);
}

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

.list-icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}

/* Empty State */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 300px;
  color: var(--color-text-secondary);
}

.empty-icon {
  width: 64px;
  height: 64px;
  color: var(--color-text-muted);
  margin-bottom: 16px;
}

.empty-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-text-main);
  margin-bottom: 6px;
}

/* Dropzone Overlay */
#dropzone-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 119, 255, 0.85);
  backdrop-filter: blur(4px);
  z-index: 100;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--color-text-inverse);
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

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

.dropzone-box {
  border: 3px dashed var(--color-text-inverse);
  border-radius: var(--border-radius-lg);
  padding: 48px 64px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.dropzone-icon {
  width: 80px;
  height: 80px;
}

.dropzone-title {
  font-size: 24px;
  font-weight: 700;
}

/* Modal Overlay & Containers */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(4px);
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-fast);
}

.modal-backdrop.open {
  opacity: 1;
  pointer-events: auto;
}

.modal-dialog {
  background-color: var(--color-bg-surface);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
  max-width: 600px;
  width: 90%;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.modal-header {
  padding: 16px 24px;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
}

.modal-body {
  padding: 24px;
  overflow-y: auto;
}

.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: flex-end;
  gap: 12px;
}

/* Media Lightbox Modals */
.lightbox-dialog {
  max-width: 90vw;
  max-height: 90vh;
  background-color: transparent;
  box-shadow: none;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.lightbox-img {
  max-width: 85vw;
  max-height: 80vh;
  object-fit: contain;
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-lg);
}

.lightbox-actions {
  margin-top: 16px;
  display: flex;
  gap: 16px;
}

/* Code Viewer Modal */
.code-pre {
  background-color: var(--color-bg-secondary);
  padding: 16px;
  border-radius: var(--border-radius-md);
  font-family: var(--font-family-mono);
  font-size: var(--font-size-sm);
  overflow-x: auto;
  max-height: 60vh;
  white-space: pre-wrap;
  word-break: break-all;
}

/* Video Player Modal */
.video-player {
  max-width: 100%;
  max-height: 70vh;
  border-radius: var(--border-radius-md);
}

/* Form Controls */
.form-group {
  margin-bottom: 16px;
}

.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 500;
  margin-bottom: 6px;
}

.form-input {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--color-border-dark);
  border-radius: var(--border-radius-sm);
  font-size: var(--font-size-md);
  outline: none;
}

.form-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0, 119, 255, 0.15);
}

/* Toast Notifications */
#toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  background-color: var(--color-text-main);
  color: var(--color-text-inverse);
  padding: 12px 20px;
  border-radius: var(--border-radius-md);
  font-size: var(--font-size-sm);
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  gap: 10px;
  animation: slideIn 0.2s ease;
}

.toast-success {
  background-color: var(--color-success);
}

.toast-danger {
  background-color: var(--color-danger);
}

@keyframes slideIn {
  from {
    transform: translateY(20px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.hidden {
  display: none !important;
}