:root {
  --bg: #0d1117;
  --bg2: #161b22;
  --panel: #1c2128;
  --panel2: #21262d;
  --text: #e6edf3;
  --muted: #8b949e;
  --line: rgba(240, 246, 252, 0.1);
  --accent: #58a6ff;
  --accent2: #a371f7;
  --critical: #ff7b72;
  --warning: #d29922;
  --info: #58a6ff;
  --suggestion: #3fb950;
  --radius: 12px;
  --font: "Noto Sans SC", system-ui, sans-serif;
  --mono: "JetBrains Mono", "Cascadia Code", Consolas, monospace;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

html[data-theme="light"] {
  --bg: #f6f8fa;
  --bg2: #ffffff;
  --panel: #ffffff;
  --panel2: #f6f8fa;
  --text: #1f2328;
  --muted: #656d76;
  --line: rgba(31, 35, 40, 0.12);
  --shadow: 0 8px 32px rgba(31, 35, 40, 0.08);
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
  margin: 0;
}

body {
  font-family: var(--font);
  color: var(--text);
  background: linear-gradient(160deg, var(--bg) 0%, var(--bg2) 100%);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Header */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  border-bottom: 1px solid var(--line);
  background: rgba(28, 33, 40, 0.85);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 50;
}

html[data-theme="light"] .app-header {
  background: rgba(255, 255, 255, 0.9);
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-icon {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  border-radius: 10px;
  font-family: var(--mono);
  font-weight: 600;
  font-size: 18px;
  color: #fff;
}

.brand-text h1 {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 700;
}

.brand-text p {
  margin: 2px 0 0;
  font-size: 0.82rem;
  color: var(--muted);
}

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

/* Main */
.app-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 20px 24px;
  gap: 16px;
  max-width: 1600px;
  width: 100%;
  margin: 0 auto;
}

/* Toolbar */
.toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 12px;
  padding: 14px 16px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.toolbar-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.toolbar-grow {
  flex: 1;
  min-width: 200px;
}

.field-label {
  font-size: 0.75rem;
  color: var(--muted);
  font-weight: 500;
}

.select {
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel2);
  color: var(--text);
  font-family: var(--font);
  font-size: 0.875rem;
  cursor: pointer;
}

.file-input {
  font-size: 0.82rem;
  color: var(--muted);
  max-width: 220px;
}

.toolbar-btns {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  padding: 8px 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel2);
  color: var(--text);
  font-family: var(--font);
  font-size: 0.875rem;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}

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

.btn-sm {
  padding: 5px 10px;
  font-size: 0.78rem;
}

.btn-ghost {
  background: transparent;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #388bfd);
  border-color: transparent;
  color: #fff;
  font-weight: 600;
  padding: 10px 24px;
}

.btn-primary:hover {
  filter: brightness(1.1);
}

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

.btn-accent {
  background: linear-gradient(135deg, var(--accent2), #8957e5);
  border-color: transparent;
  color: #fff;
  font-weight: 600;
  padding: 10px 18px;
}

.btn-accent:hover {
  filter: brightness(1.1);
}

/* Workspace */
.workspace {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  flex: 1;
  min-height: 0;
}

@media (max-width: 960px) {
  .workspace {
    grid-template-columns: 1fr;
  }
}

.panel {
  display: flex;
  flex-direction: column;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  min-height: 480px;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
  background: var(--panel2);
}

.panel-title {
  font-weight: 600;
  font-size: 0.9rem;
}

.badge {
  font-size: 0.72rem;
  padding: 3px 10px;
  border-radius: 999px;
  background: rgba(88, 166, 255, 0.15);
  color: var(--accent);
  font-weight: 500;
}

.panel-footer {
  padding: 8px 16px;
  border-top: 1px solid var(--line);
  font-size: 0.75rem;
  color: var(--muted);
}

/* Editor */
.editor-wrap {
  display: flex;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

.line-numbers {
  padding: 14px 0 14px 12px;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
  text-align: right;
  user-select: none;
  overflow: hidden;
  min-width: 40px;
  background: var(--panel2);
  border-right: 1px solid var(--line);
}

.code-editor {
  flex: 1;
  padding: 14px;
  border: none;
  outline: none;
  resize: none;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.6;
  color: var(--text);
  background: transparent;
  tab-size: 4;
}

.code-editor::placeholder {
  color: var(--muted);
  opacity: 0.6;
}

/* Score ring */
.score-ring {
  position: relative;
  width: 48px;
  height: 48px;
}

.score-ring svg {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.score-bg {
  fill: none;
  stroke: var(--line);
  stroke-width: 3;
}

.score-fill {
  fill: none;
  stroke: var(--suggestion);
  stroke-width: 3;
  stroke-linecap: round;
  transition: stroke-dasharray 0.6s ease, stroke 0.3s;
}

.score-text {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-size: 0.75rem;
  font-weight: 700;
}

/* Summary */
.summary-bar {
  display: flex;
  gap: 8px;
  padding: 10px 16px;
  border-bottom: 1px solid var(--line);
  flex-wrap: wrap;
}

.summary-item {
  font-size: 0.78rem;
  padding: 4px 10px;
  border-radius: 6px;
  font-weight: 500;
}

.summary-item.critical {
  background: rgba(255, 123, 114, 0.15);
  color: var(--critical);
}

.summary-item.warning {
  background: rgba(210, 153, 34, 0.15);
  color: var(--warning);
}

.summary-item.info {
  background: rgba(88, 166, 255, 0.15);
  color: var(--info);
}

.summary-item.suggestion {
  background: rgba(63, 185, 80, 0.15);
  color: var(--suggestion);
}

/* Filter */
.filter-bar {
  display: flex;
  gap: 6px;
  padding: 10px 16px;
  border-bottom: 1px solid var(--line);
  flex-wrap: wrap;
}

.filter-chip {
  padding: 4px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  font-size: 0.75rem;
  cursor: pointer;
  transition: all 0.15s;
}

.filter-chip:hover {
  border-color: var(--accent);
  color: var(--text);
}

.filter-chip.active {
  background: rgba(88, 166, 255, 0.15);
  border-color: var(--accent);
  color: var(--accent);
}

/* Issues list */
.issues-list {
  flex: 1;
  overflow-y: auto;
  padding: 8px;
}

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  min-height: 280px;
  color: var(--muted);
  text-align: center;
  padding: 24px;
}

.empty-icon {
  font-size: 2.5rem;
  margin-bottom: 12px;
  opacity: 0.5;
}

.empty-hint {
  font-size: 0.82rem;
  opacity: 0.7;
  max-width: 280px;
}

.issue-card {
  padding: 12px 14px;
  margin-bottom: 8px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel2);
  cursor: pointer;
  transition: border-color 0.15s, box-shadow 0.15s;
}

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

.issue-card.hidden {
  display: none;
}

.issue-card.highlight {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(88, 166, 255, 0.25);
}

.issue-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
  flex-wrap: wrap;
}

.severity-tag {
  font-size: 0.68rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.severity-tag.critical {
  background: rgba(255, 123, 114, 0.2);
  color: var(--critical);
}

.severity-tag.warning {
  background: rgba(210, 153, 34, 0.2);
  color: var(--warning);
}

.severity-tag.info {
  background: rgba(88, 166, 255, 0.2);
  color: var(--info);
}

.severity-tag.suggestion {
  background: rgba(63, 185, 80, 0.2);
  color: var(--suggestion);
}

.category-tag {
  font-size: 0.68rem;
  color: var(--muted);
  padding: 2px 6px;
  border: 1px solid var(--line);
  border-radius: 4px;
}

.line-ref {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--accent);
  margin-left: auto;
}

.issue-title {
  font-weight: 600;
  font-size: 0.875rem;
  margin-bottom: 4px;
}

.issue-message {
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.5;
  margin-bottom: 6px;
}

.issue-suggestion {
  font-size: 0.78rem;
  padding: 8px 10px;
  background: rgba(63, 185, 80, 0.08);
  border-left: 3px solid var(--suggestion);
  border-radius: 0 6px 6px 0;
  color: var(--text);
  line-height: 1.5;
}

.issue-code {
  margin-top: 8px;
  padding: 8px 10px;
  background: var(--bg);
  border-radius: 6px;
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--muted);
  overflow-x: auto;
  white-space: pre;
}

/* Footer */
.app-footer {
  padding: 12px 24px;
  text-align: center;
  font-size: 0.78rem;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

.app-footer p {
  margin: 0;
}

/* Scrollbar */
.issues-list::-webkit-scrollbar,
.code-editor::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

.issues-list::-webkit-scrollbar-thumb,
.code-editor::-webkit-scrollbar-thumb {
  background: var(--line);
  border-radius: 3px;
}

/* LLM status */
.llm-status {
  padding: 8px 16px;
  font-size: 0.82rem;
  border-bottom: 1px solid var(--line);
  display: none;
}

.llm-status.loading,
.llm-status.ok,
.llm-status.error {
  display: block;
}

.llm-status.loading {
  background: rgba(88, 166, 255, 0.1);
  color: var(--accent);
}

.llm-status.ok {
  background: rgba(63, 185, 80, 0.1);
  color: var(--suggestion);
}

.llm-status.error {
  background: rgba(255, 123, 114, 0.1);
  color: var(--critical);
}

/* Source tag */
.source-tag {
  font-size: 0.65rem;
  padding: 2px 6px;
  border-radius: 4px;
  background: rgba(163, 113, 247, 0.2);
  color: var(--accent2);
  font-weight: 600;
}

.source-tag.static {
  background: rgba(139, 148, 158, 0.15);
  color: var(--muted);
}

/* Issue actions */
.issue-actions {
  margin-top: 8px;
  display: flex;
  gap: 6px;
}

.btn-ai-fix {
  background: rgba(163, 113, 247, 0.15);
  border-color: rgba(163, 113, 247, 0.3);
  color: var(--accent2);
}

.btn-ai-fix:hover {
  background: rgba(163, 113, 247, 0.25);
}

.ai-fix-result {
  margin-top: 8px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg);
  font-size: 0.82rem;
}

.ai-fix-result.loading {
  color: var(--muted);
  font-style: italic;
}

.ai-fix-result.error {
  color: var(--critical);
  border-color: rgba(255, 123, 114, 0.3);
}

.fix-explanation {
  margin: 0 0 8px;
  line-height: 1.5;
}

.fix-code {
  margin-bottom: 8px;
}

.btn-apply-fix {
  background: rgba(63, 185, 80, 0.15);
  border-color: rgba(63, 185, 80, 0.3);
  color: var(--suggestion);
}

/* Settings dialog */
.settings-dialog {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  color: var(--text);
  padding: 0;
  max-width: 560px;
  width: calc(100% - 32px);
  box-shadow: var(--shadow);
}

.settings-dialog::backdrop {
  background: rgba(0, 0, 0, 0.6);
}

.dialog-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--line);
}

.dialog-header h2 {
  margin: 0;
  font-size: 1.1rem;
}

.dialog-body {
  padding: 20px;
  line-height: 1.6;
  font-size: 0.875rem;
}

.dialog-body code {
  font-family: var(--mono);
  font-size: 0.82rem;
  padding: 2px 6px;
  background: var(--panel2);
  border-radius: 4px;
}

.config-table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0;
  font-size: 0.82rem;
}

.config-table th,
.config-table td {
  padding: 8px 10px;
  border: 1px solid var(--line);
  text-align: left;
}

.config-table th {
  background: var(--panel2);
  font-weight: 600;
}

.config-status {
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 0.82rem;
  margin: 12px 0;
}

.config-status.ok {
  background: rgba(63, 185, 80, 0.1);
  color: var(--suggestion);
}

.config-status.error {
  background: rgba(255, 123, 114, 0.1);
  color: var(--critical);
}

.dialog-hint {
  color: var(--muted);
  font-size: 0.78rem;
  margin: 0;
}

.dialog-intro {
  margin: 0 0 16px;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.5;
}

.form-field {
  margin-bottom: 14px;
}

.form-label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.form-input {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel2);
  color: var(--text);
  font-family: var(--mono);
  font-size: 0.82rem;
  outline: none;
  transition: border-color 0.15s;
}

.form-input:focus {
  border-color: var(--accent);
}

.form-hint {
  display: block;
  margin-top: 4px;
  font-size: 0.72rem;
  color: var(--muted);
}

.dialog-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 16px;
}

.llm-status.info {
  display: block;
  background: rgba(139, 148, 158, 0.1);
  color: var(--muted);
}