/* Material 3 light theme tokens */
:root {
  --md-sys-color-primary: #4355b9;
  --md-sys-color-on-primary: #ffffff;
  --md-sys-color-primary-container: #dde1ff;
  --md-sys-color-on-primary-container: #00105c;
  --md-sys-color-secondary: #5b5d72;
  --md-sys-color-on-secondary: #ffffff;
  --md-sys-color-secondary-container: #e0e1f9;
  --md-sys-color-on-secondary-container: #181a2c;
  --md-sys-color-surface: #fbf8ff;
  --md-sys-color-on-surface: #1a1b20;
  --md-sys-color-surface-variant: #e3e1ec;
  --md-sys-color-on-surface-variant: #46464f;
  --md-sys-color-outline: #767680;
  --md-sys-color-outline-variant: #c6c5d0;
  --md-sys-color-error: #ba1a1a;
  --md-sys-color-on-error: #ffffff;
  --md-sys-color-error-container: #ffdad6;
  --md-sys-color-on-error-container: #410002;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  font-family: 'Segoe UI', 'Microsoft YaHei', system-ui, sans-serif;
  background: var(--md-sys-color-surface);
  color: var(--md-sys-color-on-surface);
}

.app-header {
  padding: 24px 32px 8px;
}

.header-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  max-width: 1400px;
  margin: 0 auto;
}

.header-titles {
  min-width: 0;
}

.app-header h1 {
  margin: 0;
  font-size: 1.6rem;
  font-weight: 600;
}

.subtitle {
  margin: 4px 0 0;
  color: var(--md-sys-color-on-surface-variant);
  font-size: 0.9rem;
}

.app-main {
  padding: 16px 32px 48px;
  max-width: 1400px;
  margin: 0 auto;
}

.toolbar {
  margin-bottom: 16px;
}

.toolbar-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}

.toolbar-row.secondary {
  gap: 8px;
}

.toolbar-row md-outlined-select {
  min-width: 200px;
}

.inline-switch {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--md-sys-color-on-surface-variant);
}

.panes {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

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

.pane-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.95rem;
  font-weight: 600;
}

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

.code-field {
  width: 100%;
  font-family: 'Cascadia Code', Consolas, monospace;
}

.code-field::part(textarea) {
  font-family: 'Cascadia Code', Consolas, monospace;
  font-size: 0.85rem;
}

.file-drop {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 24px;
  border: 2px dashed var(--md-sys-color-outline-variant);
  border-radius: 12px;
  min-height: 200px;
  justify-content: center;
  flex-wrap: wrap;
}

.file-name {
  color: var(--md-sys-color-on-surface-variant);
  font-size: 0.85rem;
}

.options {
  margin-top: 16px;
}

.options-body {
  margin-top: 12px;
  padding: 16px;
  border: 1px solid var(--md-sys-color-outline-variant);
  border-radius: 12px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.option-group h3 {
  margin: 0 0 8px;
  font-size: 0.95rem;
}

.option-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.option-row {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.9rem;
}

.option-row md-outlined-select {
  min-width: 160px;
}

.error {
  margin-top: 16px;
  padding: 12px 16px;
  border-radius: 8px;
  background: var(--md-sys-color-error-container);
  color: var(--md-sys-color-on-error-container);
  font-size: 0.9rem;
}

.seo-content {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--md-sys-color-outline-variant);
  max-width: 800px;
  color: var(--md-sys-color-on-surface-variant);
  font-size: 0.95rem;
  line-height: 1.7;
}

.seo-content h2 {
  margin: 24px 0 8px;
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--md-sys-color-on-surface);
}

.seo-content p {
  margin: 0 0 8px;
}

.seo-content ul {
  margin: 0 0 8px;
  padding-left: 20px;
}

.seo-content li {
  margin: 4px 0;
}

.conversion-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 4px 24px;
  padding-left: 0 !important;
  list-style: none;
}

.hidden {
  display: none !important;
}

@media (max-width: 900px) {
  .panes {
    grid-template-columns: 1fr;
  }
  .app-header,
  .app-main {
    padding-left: 16px;
    padding-right: 16px;
  }
}