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

:root {
  --bg: #0e1117;
  --surface: #161b22;
  --border: #30363d;
  --text: #e6edf3;
  --text-muted: #8b949e;
  --accent: #58a6ff;
  --accent-hover: #79c0ff;
  --error: #f85149;
  --diff-add-bg: rgba(46, 160, 67, 0.15);
  --diff-add-fg: #3fb950;
  --diff-del-bg: rgba(248, 81, 73, 0.15);
  --diff-del-fg: #f85149;
  --diff-info-fg: #58a6ff;
  --radius: 8px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

main {
  max-width: 860px;
  margin: 0 auto;
  padding: 48px 20px;
}

.app-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 8px;
}

.logo {
  width: 56px;
  height: 56px;
  border-radius: 12px;
  flex-shrink: 0;
}

h1 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 2px;
}

.subtitle {
  color: var(--text-muted);
  margin-bottom: 0;
}

.resources {
  display: flex;
  gap: 16px;
  margin-bottom: 28px;
}

.resources a {
  color: var(--accent);
  font-size: 0.85rem;
  text-decoration: none;
  transition: color 0.15s;
}

.resources a:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

/* ---------- Form ---------- */

.input-row {
  display: flex;
  gap: 8px;
}

#url-input {
  flex: 1;
  padding: 10px 14px;
  font-size: 0.95rem;
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  outline: none;
  transition: border-color 0.15s;
}

#url-input:focus {
  border-color: var(--accent);
}

#submit-btn {
  padding: 10px 20px;
  font-size: 0.95rem;
  font-weight: 600;
  color: #fff;
  background: var(--accent);
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s;
}

#submit-btn:hover:not(:disabled) {
  background: var(--accent-hover);
}

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

/* ---------- Errors ---------- */

.error {
  color: var(--error);
  font-size: 0.9rem;
  margin-top: 10px;
}

/* ---------- Samples ---------- */

#samples {
  margin-top: 20px;
}

.samples-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.samples-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 8px;
}

.sample-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  text-align: left;
  transition: border-color 0.15s, background 0.15s;
}

.sample-btn:hover {
  border-color: var(--accent);
  background: rgba(88, 166, 255, 0.08);
}

.sample-lang {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--bg);
  background: var(--accent);
  padding: 2px 6px;
  border-radius: 4px;
  white-space: nowrap;
}

.sample-name {
  font-size: 0.82rem;
  color: var(--text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ---------- Metadata bar ---------- */

#meta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 20px;
  padding: 10px 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.85rem;
  color: var(--text-muted);
}

#meta span::before {
  font-weight: 600;
  color: var(--text);
}

#meta-repo::before   { content: "Repo: "; }
#meta-path::before   { content: "File: "; }
#meta-branch::before { content: "Branch: "; }

/* ---------- Tabs ---------- */

#tabs {
  margin-top: 20px;
}

.tab-bar {
  display: flex;
  gap: 2px;
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
}

.tab {
  position: relative;
  padding: 10px 18px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-muted);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  transition: color 0.15s, border-color 0.15s;
}

.tab:hover {
  color: var(--text);
}

.tab.active {
  color: var(--text);
  border-bottom-color: var(--accent);
}

/* Dot: tab has content */
.tab.has-content::after {
  content: "";
  position: absolute;
  top: 8px;
  right: 6px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

/* Pulsing dot: tab is currently receiving streamed content */
.tab.streaming::after {
  background: var(--accent);
  animation: pulse 1s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

/* ---------- Tab content ---------- */

.tab-content {
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-top: none;
  border-radius: 0 0 var(--radius) var(--radius);
  min-height: 120px;
}

.tab-content-empty {
  color: var(--text-muted);
  font-style: italic;
}

/* Cursor blink while streaming */
.tab-content.is-streaming::after {
  content: "▍";
  animation: blink 0.8s step-end infinite;
}

@keyframes blink {
  50% { opacity: 0; }
}

/* ---------- Rendered markdown ---------- */

.tab-content h2 {
  display: none; /* section header is already the tab title */
}

.tab-content h3 {
  font-size: 1rem;
  margin-top: 18px;
  margin-bottom: 6px;
}

.tab-content p {
  margin-bottom: 10px;
}

.tab-content ul,
.tab-content ol {
  margin-bottom: 10px;
  padding-left: 24px;
}

.tab-content li {
  margin-bottom: 4px;
}

.tab-content strong {
  color: var(--accent);
}

.tab-content code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  background: rgba(110, 118, 129, 0.15);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.88em;
}

.tab-content pre {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  overflow-x: auto;
  margin-bottom: 12px;
}

.tab-content pre code {
  background: none;
  padding: 0;
}

/* ---------- Diff highlighting ---------- */

.diff-block {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0;
  overflow-x: auto;
  margin-bottom: 12px;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.85rem;
  line-height: 1.55;
}

.diff-block code {
  background: none;
  padding: 0;
  display: block;
}

.diff-line {
  display: block;
  padding: 1px 14px;
  white-space: pre-wrap;
  word-break: break-all;
}

.diff-add {
  background: var(--diff-add-bg);
  color: var(--diff-add-fg);
}

.diff-del {
  background: var(--diff-del-bg);
  color: var(--diff-del-fg);
}

.diff-info {
  color: var(--diff-info-fg);
  font-style: italic;
  padding-top: 4px;
  padding-bottom: 4px;
}

.diff-neutral {
  color: var(--text-muted);
}

/* ---------- Loading spinner ---------- */

.loading #submit-btn::after {
  content: "";
  display: inline-block;
  width: 14px;
  height: 14px;
  margin-left: 8px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  vertical-align: middle;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ---------- Brutality Selector ---------- */

.brutality-selector {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
}

.brutality-label {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.brutality-btn {
  padding: 6px 14px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.15s;
}

.brutality-btn:hover {
  color: var(--text);
  border-color: var(--accent);
}

.brutality-btn.active {
  color: #fff;
  background: var(--accent);
  border-color: var(--accent);
}

/* ---------- Issue Badge ---------- */

#issue-badge {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 16px;
  padding: 10px 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.85rem;
}

.badge-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.badge-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.badge-dot.critical { background: #f85149; }
.badge-dot.high { background: #f0883e; }
.badge-dot.medium { background: #d29922; }
.badge-dot.low { background: #8b949e; }

.badge-count {
  font-weight: 600;
  color: var(--text);
}

.badge-label {
  color: var(--text-muted);
}

/* ---------- Review Metrics ---------- */

#review-metrics {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  margin-top: 10px;
  padding: 10px 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.85rem;
}

.metric-item {
  display: flex;
  align-items: baseline;
  gap: 5px;
}

.metric-value {
  font-weight: 700;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

.metric-label {
  color: var(--text-muted);
}

/* ---------- Copy Button ---------- */

#copy-btn {
  padding: 6px 14px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.15s;
}

#copy-btn:hover {
  color: var(--text);
  border-color: var(--accent);
}

#copy-btn:active {
  background: var(--accent);
  color: #fff;
}

/* ---------- Save Button ---------- */

#save-btn {
  padding: 6px 14px;
  font-size: 0.82rem;
  font-weight: 500;
  color: #fff;
  background: var(--accent);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.15s;
}

#save-btn:hover {
  color: #fff;
  background: var(--accent-hover);
  border-color: var(--accent-hover);
}

/* ---------- Toast Notification ---------- */

#toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  padding: 12px 24px;
  background: var(--accent);
  color: #fff;
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: var(--radius);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  opacity: 0;
  transition: transform 0.3s ease, opacity 0.3s ease;
  z-index: 1000;
}

#toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}