:root {
  --bg-color: #0d1117;
  --panel-bg: #161b22;
  --card-bg: #21262d;
  --border-color: #30363d;
  --border-hover: #8b949e;
  --text-primary: #f0f6fc;
  --text-secondary: #8b949e;
  --accent-green: #238636;
  --accent-green-hover: #2ea043;
  --accent-blue: #58a6ff;
  --accent-red: #da3633;
  --accent-yellow: #d29922;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}

[data-theme="light"] {
  --bg-color: #f6f8fa;
  --panel-bg: #ffffff;
  --card-bg: #f6f8fa;
  --border-color: #d0d7de;
  --border-hover: #afb8c1;
  --text-primary: #1f2328;
  --text-secondary: #656d76;
  --accent-green: #1f883d;
  --accent-green-hover: #1a7f37;
  --accent-blue: #0969da;
  --accent-red: #cf222e;
  --accent-yellow: #9a6700;
  --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

body {
  background-color: var(--bg-color);
  color: var(--text-primary);
  font-family: var(--font-family);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  justify-content: center;
}

.app-container {
  width: 100%;
  max-width: 540px;
  min-height: 100vh;
  background-color: var(--panel-bg);
  display: flex;
  flex-direction: column;
  position: relative;
  box-shadow: var(--shadow);
  border-left: 1px solid var(--border-color);
  border-right: 1px solid var(--border-color);
}

/* Header */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
  background: var(--panel-bg);
  position: sticky;
  top: 0;
  z-index: 10;
}

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

.logo {
  display: flex;
  align-items: center;
  justify-content: center;
}

.brand h1 {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--text-secondary);
  display: inline-block;
}

.status-indicator.connected .status-dot {
  background-color: #3fb950;
  box-shadow: 0 0 8px #3fb950;
}

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

.icon-btn {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 1rem;
  transition: all 0.2s ease;
}

.icon-btn:hover {
  background: var(--card-bg);
  border-color: var(--border-hover);
}

/* Tab Navigation */
.tab-nav {
  display: flex;
  background: var(--bg-color);
  border-bottom: 1px solid var(--border-color);
}

.tab-btn {
  flex: 1;
  padding: 12px 10px;
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: all 0.2s ease;
}

.tab-btn.active {
  color: var(--text-primary);
  border-bottom-color: var(--accent-green);
  background: var(--panel-bg);
}

/* Tab Panes */
.tab-pane {
  display: none;
  padding: 20px;
  flex: 1;
}

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

/* Forms & Inputs */
.form-group {
  margin-bottom: 18px;
}

.label-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 6px;
}

.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.char-hint, .autosave-tag {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

input[type="text"],
input[type="password"],
input[type="url"],
textarea {
  width: 100%;
  padding: 12px 14px;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.95rem;
  font-family: inherit;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

input:focus, textarea:focus {
  outline: none;
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 3px rgba(88, 166, 255, 0.2);
}

textarea {
  resize: vertical;
  min-height: 120px;
}

.help-text {
  display: block;
  font-size: 0.78rem;
  color: var(--text-secondary);
  margin-top: 5px;
}

/* Category Pills */
.category-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.pill {
  padding: 6px 12px;
  border-radius: 20px;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

.pill.active {
  background: rgba(35, 134, 54, 0.2);
  border-color: var(--accent-green);
  color: #3fb950;
  font-weight: 600;
}

/* Quick Tools Bar */
.quick-tools {
  display: flex;
  gap: 6px;
  margin-bottom: 8px;
  overflow-x: auto;
}

.tool-btn {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-family: monospace;
  cursor: pointer;
}

.tool-btn:hover {
  color: var(--text-primary);
  border-color: var(--border-hover);
}

/* Radio cards */
.radio-card-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.radio-card {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 14px;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.radio-card input {
  margin-top: 3px;
}

.card-text strong {
  display: block;
  font-size: 0.88rem;
  color: var(--text-primary);
}

.card-text span {
  font-size: 0.78rem;
  color: var(--text-secondary);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 18px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.2s ease;
  text-decoration: none;
}

.btn-block {
  width: 100%;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 0.82rem;
}

.btn-primary {
  background: var(--accent-green);
  color: #ffffff;
}

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

.btn-secondary {
  background: var(--card-bg);
  border-color: var(--border-color);
  color: var(--text-primary);
}

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

.btn-danger {
  background: rgba(218, 54, 51, 0.15);
  border: 1px solid var(--accent-red);
  color: var(--accent-red);
}

.btn-danger:hover {
  background: var(--accent-red);
  color: #ffffff;
}

.action-footer {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 24px;
}

.target-badge {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  color: var(--text-secondary);
  background: var(--card-bg);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  border: 1px dashed var(--border-color);
}

.target-badge code {
  color: var(--accent-blue);
  word-break: break-all;
}

/* Banners & Alerts */
.alert-box {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  font-size: 0.85rem;
}

.alert-box.banner {
  background: rgba(210, 153, 34, 0.15);
  border: 1px solid var(--accent-yellow);
  color: var(--accent-yellow);
}

/* Input with action */
.input-with-action {
  display: flex;
  gap: 6px;
}

/* History List */
.history-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.history-header h2 {
  font-size: 1.1rem;
}

.history-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.commit-card {
  padding: 14px;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  transition: border-color 0.2s ease;
}

.commit-card:hover {
  border-color: var(--border-hover);
}

.commit-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 6px;
}

.commit-msg {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-primary);
}

.commit-time {
  font-size: 0.75rem;
  color: var(--text-secondary);
  white-space: nowrap;
  margin-left: 10px;
}

.commit-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 8px;
}

.commit-sha {
  font-family: monospace;
  font-size: 0.75rem;
  color: var(--accent-blue);
  text-decoration: none;
}

.commit-sha:hover {
  text-decoration: underline;
}

/* Danger Zone */
.danger-zone {
  margin-top: 36px;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
}

.danger-zone h3 {
  font-size: 0.95rem;
  color: var(--accent-red);
  margin-bottom: 4px;
}

.danger-zone p {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

/* Modal */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 100;
}

.modal-card {
  background: var(--panel-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  width: 100%;
  max-width: 400px;
  text-align: center;
  box-shadow: var(--shadow);
}

.modal-icon {
  font-size: 2.5rem;
  margin-bottom: 12px;
}

.modal-card h3 {
  font-size: 1.2rem;
  margin-bottom: 6px;
}

.modal-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.modal-meta {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-size: 0.82rem;
  text-align: left;
  margin-bottom: 20px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.modal-actions {
  display: flex;
  gap: 10px;
}

.modal-actions .btn {
  flex: 1;
}

/* Toast */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: #21262d;
  color: #f0f6fc;
  border: 1px solid #30363d;
  padding: 12px 20px;
  border-radius: 30px;
  font-size: 0.88rem;
  font-weight: 500;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
  z-index: 200;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.toast.success {
  border-color: #3fb950;
  color: #3fb950;
}

.toast.error {
  border-color: #da3633;
  color: #f85149;
}

/* Spinner */
.spinner, .btn-spinner {
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: #ffffff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  display: inline-block;
}

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

.loader-box, .empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-secondary);
}

.hidden {
  display: none !important;
}