/* === NZ Tax RAG — Design Tokens === */
:root {
  --color-teal: #1a3a4a;
  --color-teal-light: #245163;
  --color-gold: #8a6f1e;
  --color-gold-hover: #755e14;
  --color-gold-light: #faf3dc;
  --color-cream: #fefcf3;
  --color-grey-50: #f7f8f9;
  --color-grey-100: #eef0f2;
  --color-grey-200: #d8dce0;
  --color-grey-600: #5a6672;
  --color-grey-800: #2d3540;
  --color-red-light: #fdf0f0;
  --color-red-border: #e8b4b4;
  --color-red-text: #8b2020;
  --color-link: #1a6b8a;
  --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --max-width: 760px;
  --radius: 8px;
  --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-hover: 0 4px 12px rgba(0, 0, 0, 0.1);
  --transition: 0.2s ease;
}

/* === Reset & Base === */
*, *::before, *::after { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font-stack);
  color: var(--color-grey-800);
  background: var(--color-grey-50);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* === Visually Hidden (accessible to screen readers) === */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* === Skip Link === */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  padding: 0.5rem 1rem;
  background: var(--color-teal);
  color: #fff;
  border-radius: 0 0 var(--radius) var(--radius);
  z-index: 100;
  text-decoration: none;
  font-size: 0.85rem;
}

.skip-link:focus {
  top: 0;
}

/* === Header === */
.header {
  background: var(--color-teal);
  color: #fff;
  padding: 1.5rem 1rem;
  text-align: center;
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
}

.header-fern { height: 36px; width: 36px; flex-shrink: 0; }

.header h1 {
  margin: 0;
  font-size: 1.4rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.header .subtitle {
  margin: 0.2rem 0 0;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.85);
  font-weight: 400;
}

/* === Main Container === */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.25rem 1rem 3rem;
}

/* === Disclaimer === */
.disclaimer {
  background: var(--color-gold-light);
  border-left: 4px solid var(--color-gold);
  padding: 0.75rem 1rem;
  border-radius: 0 var(--radius) var(--radius) 0;
  margin-bottom: 1.5rem;
  font-size: 0.85rem;
  color: var(--color-grey-800);
  line-height: 1.5;
}

/* === Ask Section === */
.ask-card {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  padding: 1.25rem;
  margin-bottom: 1.5rem;
}

.ask-form {
  display: flex;
  gap: 0.625rem;
  align-items: flex-end;
}

.ask-form textarea {
  flex: 1;
  font-family: var(--font-stack);
  font-size: 0.95rem;
  padding: 0.625rem 0.75rem;
  border: 1.5px solid var(--color-grey-200);
  border-radius: var(--radius);
  resize: none;
  min-height: 44px;
  max-height: 160px;
  line-height: 1.5;
  color: var(--color-grey-800);
  transition: border-color var(--transition);
  overflow-y: auto;
}

.ask-form textarea:focus {
  outline: 2px solid var(--color-gold);
  outline-offset: 1px;
  border-color: var(--color-gold);
}

.ask-form textarea::placeholder { color: #767676; }

.ask-btn {
  background: var(--color-gold);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  padding: 0.625rem 1.5rem;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  height: 44px;
  transition: background var(--transition), transform var(--transition);
}

.ask-btn:hover { background: var(--color-gold-hover); }
.ask-btn:active { transform: scale(0.97); }
.ask-btn:disabled { opacity: 0.6; cursor: not-allowed; }

/* === Focus Indicators === */
.ask-btn:focus-visible,
.ask-another-btn:focus-visible,
.retry-btn:focus-visible,
.example-card:focus-visible {
  outline: 2px solid var(--color-teal);
  outline-offset: 2px;
}

/* === Examples === */
.examples-section { margin-bottom: 1.5rem; }

.examples-label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-grey-600);
  margin: 0 0 0.625rem;
  font-weight: 600;
}

.examples-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
}

.example-card {
  background: var(--color-grey-100);
  border: 1.5px solid transparent;
  border-radius: var(--radius);
  padding: 0.625rem 0.75rem;
  font-size: 0.85rem;
  color: var(--color-grey-800);
  cursor: pointer;
  transition: box-shadow var(--transition), border-color var(--transition), transform var(--transition);
  line-height: 1.4;
  font-family: var(--font-stack);
  text-align: left;
}

.example-card:hover {
  border-color: var(--color-gold);
  box-shadow: var(--shadow-hover);
  transform: translateY(-1px);
}

/* === Loading === */
.loading-section {
  text-align: center;
  padding: 2.5rem 1rem;
}

.loading-dots {
  display: inline-flex;
  gap: 6px;
  margin-bottom: 0.75rem;
}

.loading-dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-gold);
  animation: bounce 1.2s ease-in-out infinite;
}

.loading-dots span:nth-child(2) { animation-delay: 0.15s; }
.loading-dots span:nth-child(3) { animation-delay: 0.3s; }

@keyframes bounce {
  0%, 80%, 100% { transform: scale(0.6); opacity: 0.4; }
  40% { transform: scale(1); opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
  .loading-dots span {
    animation: none;
    opacity: 1;
    transform: none;
  }
}

.loading-text {
  font-size: 0.9rem;
  color: var(--color-grey-600);
}

/* === Answer === */
.answer-section {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.answer-section:focus { outline: none; }

/* Markdown content styles */
.answer-content h1,
.answer-content h2,
.answer-content h3,
.answer-content h4 {
  margin: 1.25rem 0 0.5rem;
  color: var(--color-teal);
  line-height: 1.3;
}

.answer-content h1 { font-size: 1.25rem; }
.answer-content h2 { font-size: 1.1rem; }
.answer-content h3 { font-size: 1rem; }
.answer-content h4 { font-size: 0.95rem; }
.answer-content h1:first-child,
.answer-content h2:first-child,
.answer-content h3:first-child { margin-top: 0; }

.answer-content p { margin: 0.5rem 0; }

.answer-content ul, .answer-content ol {
  margin: 0.5rem 0;
  padding-left: 1.5rem;
}

.answer-content li { margin: 0.25rem 0; }

.answer-content table {
  border-collapse: collapse;
  width: 100%;
  margin: 0.75rem 0;
  font-size: 0.9rem;
}

.answer-content th, .answer-content td {
  border: 1px solid var(--color-grey-200);
  padding: 0.5rem 0.75rem;
  text-align: left;
}

.answer-content th {
  background: var(--color-grey-100);
  font-weight: 600;
}

.answer-content code {
  background: var(--color-grey-100);
  padding: 0.15em 0.35em;
  border-radius: 4px;
  font-size: 0.88em;
}

.answer-content pre {
  background: var(--color-grey-100);
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  overflow-x: auto;
}

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

.answer-content a {
  color: var(--color-link);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.answer-content strong { color: var(--color-grey-800); }

/* Sources */
.sources { margin-top: 1.25rem; padding-top: 1rem; border-top: 1px solid var(--color-grey-200); }

.sources-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-grey-600);
  margin: 0 0 0.5rem;
  font-weight: 600;
}

.sources-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.sources-list li { font-size: 0.85rem; }

.sources-list a {
  color: var(--color-link);
  text-decoration: none;
  transition: color var(--transition);
}

.sources-list a:hover { text-decoration: underline; }

.sources-list a::after {
  content: " \2197";
  font-size: 0.75em;
  opacity: 0.6;
}

.source-section {
  color: var(--color-grey-600);
  font-size: 0.8rem;
}

/* Model attribution */
.model-attr {
  margin-top: 0.75rem;
  font-size: 0.75rem;
  color: var(--color-grey-600);
}

/* Ask Another button */
.ask-another-btn {
  display: inline-block;
  margin-top: 1rem;
  background: none;
  border: 1.5px solid var(--color-grey-200);
  border-radius: var(--radius);
  padding: 0.5rem 1.25rem;
  font-size: 0.85rem;
  color: var(--color-grey-600);
  cursor: pointer;
  font-family: var(--font-stack);
  transition: border-color var(--transition), color var(--transition);
}

.ask-another-btn:hover {
  border-color: var(--color-teal);
  color: var(--color-teal);
}

/* === Error === */
.error-section {
  background: var(--color-red-light);
  border: 1px solid var(--color-red-border);
  border-radius: var(--radius);
  padding: 1.25rem;
  text-align: center;
  margin-bottom: 1.5rem;
}

.error-section:focus { outline: none; }

.error-section p {
  color: var(--color-red-text);
  margin: 0 0 0.75rem;
  font-size: 0.9rem;
}

.retry-btn {
  background: none;
  border: 1.5px solid var(--color-red-border);
  border-radius: var(--radius);
  padding: 0.5rem 1.25rem;
  font-size: 0.85rem;
  color: var(--color-red-text);
  cursor: pointer;
  font-family: var(--font-stack);
  transition: background var(--transition);
}

.retry-btn:hover { background: rgba(139, 32, 32, 0.06); }

/* === Footer === */
.footer {
  text-align: center;
  padding: 1.5rem 1rem;
  font-size: 0.78rem;
  color: var(--color-grey-600);
  line-height: 1.6;
}

.footer a { color: var(--color-link); }

/* === Utility === */
[hidden] { display: none !important; }

/* === Responsive === */
@media (max-width: 600px) {
  .header h1 { font-size: 1.2rem; }
  .container { padding: 1rem 0.75rem 2rem; }
  .ask-form { flex-direction: column; }
  .ask-btn { width: 100%; }
  .examples-grid { grid-template-columns: 1fr; }
  .answer-section { padding: 1.125rem; }
}