:root {
  /* 浅色主题 */
  --bg: #ffffff;
  --bg-secondary: #f6f8fa;
  --bg-tertiary: #eef2f6;
  --border: #d0d7de;
  --border-active: #0969da;
  --text: #24292f;
  --text-secondary: #57606a;
  --text-muted: #6e7781;
  --accent: #0969da;
  --accent-hover: #0550ae;
  --success: #1a7f37;
  --warning: #bf8700;
  --danger: #cf222e;
  --radius: 6px;
  --shadow: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-hover: 0 3px 8px rgba(0,0,0,0.12);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans', Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  font-size: 14px;
}

/* Login Screen */
.login-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
}

.login-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  width: 100%;
  max-width: 340px;
}

.logo-section {
  text-align: center;
  margin-bottom: 24px;
}

.logo-icon {
  width: 48px;
  height: 48px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin: 0 auto 16px;
}

.logo-section h1 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 6px;
}

.logo-section p {
  color: var(--text-secondary);
  font-size: 13px;
}

.input-group {
  margin-bottom: 16px;
}

.input-group label {
  display: block;
  margin-bottom: 6px;
  font-size: 13px;
  font-weight: 600;
}

input[type="text"],
input[type="password"],
input[type="number"],
input[type="url"],
input[type="email"],
select,
textarea {
  width: 100%;
  padding: 8px 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 14px;
  font-family: inherit;
  transition: border-color 0.2s;
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--accent);
}

textarea {
  resize: vertical;
  min-height: 80px;
}

.btn-primary,
.btn-secondary,
.btn-ghost,
.btn-danger {
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
  font-family: inherit;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  width: 100%;
}

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

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

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

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: none;
}

.btn-ghost:hover {
  background: var(--bg-tertiary);
  color: var(--text);
}

.btn-danger {
  background: var(--danger);
  color: white;
  border-color: var(--danger);
}

.btn-danger:hover {
  background: #b62324;
}

.btn-icon {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 6px;
  border-radius: var(--radius);
  font-size: 14px;
}

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

.error-message {
  color: var(--danger);
  font-size: 13px;
  margin-top: 8px;
  min-height: 20px;
}

/* Dashboard Layout */
.dashboard {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: 240px;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.sidebar-header {
  padding: 16px;
  border-bottom: 1px solid var(--border);
}

.logo-compact {
  width: 32px;
  height: 32px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  float: left;
  margin-right: 12px;
}

.brand h2 {
  font-size: 16px;
  font-weight: 600;
  line-height: 32px;
}

.version {
  font-size: 11px;
  color: var(--text-muted);
  background: var(--bg);
  padding: 2px 6px;
  border-radius: 3px;
  margin-left: 8px;
}

.nav-menu {
  flex: 1;
  padding: 8px;
  overflow-y: auto;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  margin-bottom: 2px;
  border-radius: var(--radius);
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  transition: all 0.15s;
}

.nav-item .icon {
  font-size: 16px;
  width: 20px;
  text-align: center;
}

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

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

.sidebar-footer {
  padding: 8px;
  border-top: 1px solid var(--border);
}

/* Main Content */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.content-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--bg-secondary);
  flex-wrap: wrap;
  gap: 12px;
}

.header-left h1 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 4px;
}

.subtitle {
  color: var(--text-secondary);
  font-size: 13px;
}

.header-actions {
  display: flex;
  gap: 8px;
}

.header-actions .btn-primary {
  width: auto;
}

.content-body {
  flex: 1;
  padding: 24px;
  overflow-y: auto;
}

/* Tab Content */
.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

/* Cards */
.card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 16px;
}

.card-header {
  padding: 16px;
  border-bottom: 1px solid var(--border);
}

.card-header h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
}

.card-body {
  padding: 16px;
}

.hint {
  color: var(--text-muted);
  font-size: 12px;
  margin-top: 4px;
}

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}

.stat-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
}

.stat-label {
  color: var(--text-secondary);
  font-size: 12px;
  margin-bottom: 6px;
}

.stat-value {
  font-size: 24px;
  font-weight: 600;
  margin-bottom: 4px;
}

.stat-hint {
  color: var(--text-muted);
  font-size: 11px;
}

/* Action Grid */
.action-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
}

.action-card {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  text-align: center;
  transition: all 0.15s;
}

.action-card:hover {
  border-color: var(--accent);
  background: var(--bg-secondary);
}

.action-icon {
  font-size: 28px;
}

.action-title {
  font-weight: 600;
  font-size: 14px;
}

.action-hint {
  font-size: 12px;
  color: var(--text-muted);
}

/* URL List */
.url-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.url-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.url-item label {
  min-width: 70px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
}

.url-code {
  flex: 1;
  padding: 6px 10px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-family: 'Consolas', 'Monaco', monospace;
  font-size: 12px;
  color: var(--accent);
  word-break: break-all;
}

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

.form-group label {
  display: block;
  margin-bottom: 6px;
  font-size: 13px;
  font-weight: 600;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}

.checkbox-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 16px 0;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: 13px;
}

.checkbox-label input[type="checkbox"] {
  width: 16px;
  height: 16px;
  cursor: pointer;
}

.form-actions {
  display: flex;
  gap: 8px;
  margin-top: 16px;
  flex-wrap: wrap;
}

.form-actions .btn-primary {
  width: auto;
}

/* Upload Zone */
.upload-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  transition: all 0.2s;
  cursor: pointer;
}

.upload-zone:hover {
  border-color: var(--accent);
  background: var(--bg-tertiary);
}

.upload-icon {
  font-size: 32px;
  margin-bottom: 12px;
}

.upload-text {
  color: var(--text-secondary);
  margin-bottom: 12px;
  font-size: 13px;
}

.file-info {
  margin-top: 16px;
  padding: 12px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.file-detail {
  display: flex;
  justify-content: space-between;
  padding: 6px 0;
  font-size: 13px;
}

.file-detail .label {
  color: var(--text-secondary);
  font-weight: 600;
}

.file-detail code {
  font-family: 'Consolas', 'Monaco', monospace;
  font-size: 11px;
  color: var(--accent);
  background: var(--bg);
  padding: 2px 6px;
  border-radius: 3px;
}

/* Source List */
.source-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.source-item {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.source-item.testing {
  border-color: var(--warning);
  background: #fff8e1;
}

.source-item.test-success {
  border-color: var(--success);
  background: #e8f5e9;
}

.source-item.test-failed {
  border-color: var(--danger);
  background: #ffebee;
}

.source-toggle {
  display: flex;
  align-items: center;
}

.source-info {
  flex: 1;
}

.source-name {
  font-weight: 600;
  font-size: 14px;
  margin-bottom: 2px;
}

.source-id {
  font-size: 12px;
  color: var(--text-muted);
  font-family: 'Consolas', monospace;
}

.source-actions {
  display: flex;
  gap: 8px;
}

.btn-test {
  padding: 4px 12px;
  font-size: 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-test:hover {
  background: var(--bg-tertiary);
  border-color: var(--accent);
}

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

.test-result {
  font-size: 12px;
  margin-top: 4px;
  padding: 4px 8px;
  border-radius: 4px;
}

.test-result.success {
  color: var(--success);
  background: #e8f5e9;
}

.test-result.failed {
  color: var(--danger);
  background: #ffebee;
}

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

/* Feed Section */
.feed-section {
  margin-bottom: 16px;
  padding: 16px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.feed-section h4 {
  margin-bottom: 12px;
  font-size: 14px;
  font-weight: 600;
}

/* Feed Table */
.feed-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.feed-table th,
.feed-table td {
  padding: 8px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.feed-table th {
  font-size: 12px;
  color: var(--text-secondary);
  font-weight: 600;
  background: var(--bg);
}

.feed-table input[type="text"],
.feed-table input[type="number"] {
  padding: 4px 8px;
  font-size: 12px;
}

.feed-table input[type="checkbox"] {
  cursor: pointer;
}

/* Toast */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 16px;
  display: none;
  align-items: center;
  gap: 10px;
  z-index: 1000;
  font-size: 13px;
  min-width: 280px;
}

.toast.show {
  display: flex;
}

.toast.success {
  border-left: 3px solid var(--success);
}

.toast.error {
  border-left: 3px solid var(--danger);
}

.toast.warning {
  border-left: 3px solid var(--warning);
}

/* Switch Toggle */
.switch {
  position: relative;
  display: inline-block;
  width: 40px;
  height: 22px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border);
  transition: .3s;
  border-radius: 22px;
}

.slider:before {
  position: absolute;
  content: "";
  height: 16px;
  width: 16px;
  left: 2px;
  bottom: 2px;
  background-color: var(--text-muted);
  transition: .3s;
  border-radius: 50%;
}

input:checked + .slider {
  background-color: var(--accent);
  border-color: var(--accent);
}

input:checked + .slider:before {
  transform: translateX(18px);
  background-color: white;
}

/* Responsive */
@media (max-width: 1024px) {
  .dashboard {
    flex-direction: column;
  }

  .sidebar {
    width: 100%;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }

  .nav-menu {
    display: flex;
    flex-direction: row;
    overflow-x: auto;
    padding: 8px;
  }

  .nav-item {
    flex-shrink: 0;
  }

  .sidebar-footer {
    border-top: none;
    border-left: 1px solid var(--border);
  }

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

@media (max-width: 640px) {
  .content-body {
    padding: 16px;
  }

  .content-header {
    padding: 16px;
  }

  .login-card {
    padding: 24px;
  }

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

  .url-item {
    flex-direction: column;
    align-items: flex-start;
  }

  .url-item label {
    min-width: auto;
  }
}