:root {
  --bg-main: #0f172a;
  --bg-card: #1e293b;
  --bg-card-subtle: #334155;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --border: #334155;
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --mock-purple: #8b5cf6;
  --code-bg: #090d16;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

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

body {
  background-color: var(--bg-main);
  color: var(--text-main);
  font-family: var(--font-sans);
  line-height: 1.5;
  min-height: 100vh;
  padding: 1rem;
}

.app-container {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

/* Header */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border);
}

.header-left {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-main);
}

.logo-badge {
  font-size: 0.75rem;
  text-transform: uppercase;
  background-color: var(--border);
  color: var(--text-muted);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  letter-spacing: 0.05em;
}

.badge {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
}

.badge-mock {
  background-color: #581c87;
  color: #d8b4fe;
  border: 1px solid #7e22ce;
}

/* Status Indicator */
.status-indicator {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  font-weight: 500;
}

.status-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}

.status-connected .status-dot { background-color: var(--success); }
.status-connected { color: var(--success); }

.status-connecting .status-dot { background-color: var(--warning); }
.status-connecting { color: var(--warning); }

.status-disconnected .status-dot { background-color: var(--danger); }
.status-disconnected { color: var(--danger); }

/* Auth Card */
.auth-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem 1rem;
}

.auth-fields {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.auth-fields label {
  font-size: 0.875rem;
  color: var(--text-muted);
  white-space: nowrap;
}

.auth-fields input {
  flex: 1;
  min-width: 200px;
  background-color: var(--bg-main);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-main);
  padding: 0.45rem 0.75rem;
  font-size: 0.9rem;
}

.auth-fields input:focus {
  outline: none;
  border-color: var(--primary);
}

.btn {
  padding: 0.45rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: 6px;
  border: none;
  cursor: pointer;
  transition: background-color 0.15s ease;
}

.btn-primary {
  background-color: var(--primary);
  color: #fff;
}

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

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

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

.auth-error-msg {
  color: var(--danger);
  font-size: 0.85rem;
  margin-top: 0.5rem;
}

/* Task Banner */
.task-banner {
  border-radius: 8px;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border);
  transition: all 0.2s ease;
}

.banner-idle {
  background-color: #172033;
  color: var(--text-muted);
}

.banner-processing {
  background-color: #1e1b4b;
  border-color: #4338ca;
  color: #a5b4fc;
}

.task-banner-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.task-banner-title {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 500;
}

.task-banner-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.85rem;
}

.task-timer {
  background-color: rgba(255, 255, 255, 0.1);
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  font-family: var(--font-mono);
}

.spinner {
  width: 14px;
  height: 14px;
  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); }
}

/* Alerts */
.alert {
  border-radius: 8px;
  padding: 1rem;
  border: 1px solid transparent;
}

.alert-title {
  font-weight: 600;
  margin-bottom: 0.35rem;
}

.alert-body {
  font-size: 0.9rem;
  white-space: pre-wrap;
}

.alert-danger {
  background-color: #450a0a;
  border-color: #991b1b;
  color: #fca5a5;
}

.alert-warning {
  background-color: #451a03;
  border-color: #9a3412;
  color: #fdba74;
}

.alert-list {
  margin-top: 0.5rem;
  padding-left: 1.25rem;
}

/* Cards & Sections */
.result-section {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem;
}

.card-title {
  font-size: 1rem;
  font-weight: 600;
  color: #cbd5e1;
  margin-bottom: 0.75rem;
}

.card-header-flex {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
}

.card-header-flex .card-title {
  margin-bottom: 0;
}

.text-block {
  font-size: 0.925rem;
  color: var(--text-main);
  white-space: pre-wrap;
  line-height: 1.6;
}

/* Previous notice */
.previous-notice {
  background-color: #1f2937;
  color: #9ca3af;
  border: 1px dashed #4b5563;
  padding: 0.5rem 0.75rem;
  border-radius: 6px;
  font-size: 0.85rem;
  text-align: center;
}

/* Complexity Grid */
.complexity-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
}

.complexity-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
}

.complexity-label {
  font-size: 0.775rem;
  text-transform: uppercase;
  color: var(--text-dim);
  letter-spacing: 0.05em;
  margin-bottom: 0.35rem;
}

.complexity-value {
  font-size: 0.95rem;
  font-weight: 500;
  color: #38bdf8;
  font-family: var(--font-mono);
}

/* Code Pre */
.code-pre {
  background-color: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1rem;
  overflow-x: auto;
}

.code-content {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.6;
  color: #e2e8f0;
  white-space: pre;
  display: block;
}

/* Edge Cases List */
.edge-cases-list {
  padding-left: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  font-size: 0.9rem;
  color: #cbd5e1;
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 3.5rem 1.5rem;
  background-color: var(--bg-card);
  border: 1px dashed var(--border);
  border-radius: 8px;
}

.empty-icon {
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
}

.empty-state h3 {
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
  color: var(--text-main);
}

.empty-state p {
  font-size: 0.9rem;
  color: var(--text-muted);
  max-width: 500px;
  margin: 0 auto;
}

kbd {
  background-color: var(--bg-card-subtle);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.15rem 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.hidden {
  display: none !important;
}