/* ===================================================================
   Jsonhalt — Brand styles
   Built from assets/brand.md tokens. No blocklist items.
   =================================================================== */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400&family=Inter:wght@400;500;600;700&display=swap');

/* ── Brand tokens (from brand.md tokens block) ──────────────────── */
:root {
  --font-display: 'Inter', system-ui, sans-serif;
  --font-body: 'IBM Plex Mono', 'Courier New', monospace;
  --font-mono: 'IBM Plex Mono', 'Courier New', monospace;
  --radius: 2px;
  --space: 4px;

  /* Palette */
  --color-primary:       #1a5cff;
  --color-primary-hover: #0a46e0;
  --color-error:         #dc2626;
  --color-warning:       #d97706;
  --color-success:       #16a34a;
  --color-bg:            #ffffff;
  --color-surface:       #f8fafc;
  --color-code-bg:       #f1f5f9;
  --color-border:        #e2e8f0;
  --color-border-focus:  #1a5cff;
  --color-text-primary:   #0f172a;
  --color-text-secondary: #475569;
  --color-text-muted:     #94a3b8;
  --color-text-inverse:   #ffffff;
  --color-line-number:   #94a3b8;
  --color-highlight:     #fef08a;
  --color-syntax-key:    #1a5cff;
  --color-syntax-string: #0f766e;
  --color-syntax-number: #7c3aed;
}

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

html {
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-weight: 400;
  color: var(--color-text-primary);
  background: var(--color-bg);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── Shared page wrapper ────────────────────────────────────────── */
.page-wrapper {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 calc(var(--space) * 4);
  width: 100%;
  flex: 1;
  display: flex;
  flex-direction: column;
}

/* ── Site header / nav ──────────────────────────────────────────── */
.site-header {
  border-bottom: 1px solid var(--color-border);
  padding: calc(var(--space) * 3) 0;
  margin-bottom: calc(var(--space) * 8);
}

.header-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 calc(var(--space) * 4);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo-link {
  display: flex;
  align-items: center;
  gap: calc(var(--space) * 2);
  text-decoration: none;
  color: var(--color-text-primary);
}

.logo-link:hover {
  opacity: 0.85;
}

.logo-text {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.1rem;
  letter-spacing: -0.01em;
}

.site-nav {
  display: flex;
  gap: calc(var(--space) * 6);
  align-items: center;
}

.site-nav a {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color 200ms ease;
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--color-primary);
}

/* ── Footer ─────────────────────────────────────────────────────── */
.site-footer {
  margin-top: calc(var(--space) * 16);
  padding: calc(var(--space) * 6) 0;
  border-top: 1px solid var(--color-border);
}

.footer-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 calc(var(--space) * 4);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-display);
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.footer-nav {
  display: flex;
  gap: calc(var(--space) * 4);
}

.footer-nav a {
  color: var(--color-text-muted);
  text-decoration: none;
}

.footer-nav a:hover {
  color: var(--color-text-primary);
}

/* ── Typography ─────────────────────────────────────────────────── */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.25;
  color: var(--color-text-primary);
}

h1 { font-size: 1.75rem; font-weight: 700; }
h2 { font-size: 1.2rem; }
h3 { font-size: 1.05rem; }

.mono {
  font-family: var(--font-body);
}

p {
  color: var(--color-text-secondary);
  max-width: 60ch;
}

/* ── Buttons ────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 0.875rem;
  padding: calc(var(--space) * 2) calc(var(--space) * 4);
  border: none;
  border-radius: 0;
  cursor: pointer;
  text-decoration: none;
  transition: background 200ms ease, color 200ms ease;
  line-height: 1.4;
}

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

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

.btn-secondary {
  background: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-border);
}

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

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

/* ── Input fields ───────────────────────────────────────────────── */
.input-field {
  font-family: var(--font-body);
  font-size: 0.85rem;
  padding: calc(var(--space) * 2) calc(var(--space) * 3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  color: var(--color-text-primary);
  outline: none;
  width: 100%;
  transition: border-color 200ms ease;
}

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

.input-field::placeholder {
  color: var(--color-text-muted);
  font-family: var(--font-display);
}

textarea.input-field {
  resize: vertical;
  min-height: 120px;
  font-family: var(--font-body);
  line-height: 1.5;
}

/* ── Tab bar ────────────────────────────────────────────────────── */
.tab-bar {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: calc(var(--space) * 4);
}

.tab-btn {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 0.85rem;
  padding: calc(var(--space) * 2) calc(var(--space) * 4);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: color 200ms ease, border-color 200ms ease;
  border-radius: 0;
}

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

.tab-btn.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.tab-panel {
  display: none;
}

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

/* ── App layout ─────────────────────────────────────────────────── */
.app-container {
  display: flex;
  flex-direction: column;
  gap: calc(var(--space) * 3);
}

.input-group {
  display: flex;
  gap: calc(var(--space) * 2);
  align-items: flex-start;
}

.input-group .input-field {
  flex: 1;
}

/* ── Results / diagnostics ──────────────────────────────────────── */
.result-box {
  margin-top: calc(var(--space) * 3);
  font-family: var(--font-body);
  font-size: 0.85rem;
  line-height: 1.65;
  border: none;
  box-shadow: none;
}

.result-box .diag-line {
  display: flex;
  gap: calc(var(--space) * 2);
  padding: 1px 0;
  align-items: baseline;
}

.result-box .diag-label {
  color: var(--color-text-muted);
  min-width: 10ch;
  flex-shrink: 0;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 0.78rem;
}

.result-box .diag-value {
  color: var(--color-text-primary);
  word-break: break-all;
}

.result-box .diag-value.error {
  color: var(--color-error);
}

.result-box .diag-value.success {
  color: var(--color-success);
}

.result-box .diag-value.warning {
  color: var(--color-warning);
}

.result-box .diag-separator {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: calc(var(--space) * 2) 0;
}

.result-box .diag-section-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--color-text-primary);
  margin: calc(var(--space) * 2) 0 calc(var(--space) * 1);
}

.result-box .code-block {
  background: var(--color-code-bg);
  padding: calc(var(--space) * 3);
  font-family: var(--font-body);
  font-size: 0.8rem;
  line-height: 1.5;
  white-space: pre-wrap;
  word-break: break-all;
  border-radius: var(--radius);
  overflow-x: auto;
  max-height: 300px;
  overflow-y: auto;
  border: 1px solid var(--color-border);
  margin-top: calc(var(--space) * 1);
}

.result-box .error-highlight-bar {
  background: var(--color-highlight);
  padding: calc(var(--space) * 1) calc(var(--space) * 2);
  font-family: var(--font-body);
  font-size: 0.85rem;
  line-height: 1.6;
  margin-top: calc(var(--space) * 2);
  border-left: 3px solid var(--color-error);
}

.result-placeholder {
  color: var(--color-text-muted);
  font-family: var(--font-display);
  font-size: 0.9rem;
  margin-top: calc(var(--space) * 6);
  text-align: center;
  padding: calc(var(--space) * 8) 0;
}

.result-placeholder .key-icon {
  font-size: 2rem;
  display: block;
  margin-bottom: calc(var(--space) * 2);
  opacity: 0.4;
}

/* ── Status indicator ───────────────────────────────────────────── */
.status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-right: calc(var(--space) * 1);
}

.status-dot.valid   { background: var(--color-success); }
.status-dot.invalid { background: var(--color-error); }
.status-dot.pending { background: var(--color-warning); }

/* ── Home page sections ─────────────────────────────────────────── */
.hero-section {
  padding: calc(var(--space) * 12) 0 calc(var(--space) * 8);
}

.hero-section h1 {
  font-size: 1.9rem;
  margin-bottom: calc(var(--space) * 3);
  max-width: 18em;
}

.hero-section .hero-desc {
  font-size: 1.05rem;
  color: var(--color-text-secondary);
  margin-bottom: calc(var(--space) * 5);
  max-width: 55ch;
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  gap: calc(var(--space) * 3);
  align-items: center;
}

.section-block {
  padding: calc(var(--space) * 8) 0;
  border-top: 1px solid var(--color-border);
}

.section-block h2 {
  margin-bottom: calc(var(--space) * 3);
}

.section-block p {
  margin-bottom: calc(var(--space) * 2);
  font-size: 0.95rem;
}

.feature-list {
  list-style: none;
  padding: 0;
  margin: calc(var(--space) * 3) 0;
}

.feature-list li {
  padding: calc(var(--space) * 1.5) 0;
  font-family: var(--font-body);
  font-size: 0.85rem;
  color: var(--color-text-primary);
  display: flex;
  gap: calc(var(--space) * 2);
  align-items: baseline;
}

.feature-list li::before {
  content: "→";
  color: var(--color-text-muted);
  font-family: var(--font-display);
  font-weight: 500;
}

/* ── Pricing ────────────────────────────────────────────────────── */
.pricing-grid {
  display: flex;
  gap: calc(var(--space) * 4);
  margin: calc(var(--space) * 6) 0;
}

.pricing-card {
  flex: 1;
  border: 1px solid var(--color-border);
  padding: calc(var(--space) * 6);
  display: flex;
  flex-direction: column;
}

.pricing-card.featured {
  border-color: var(--color-primary);
}

.pricing-card h3 {
  font-weight: 600;
  margin-bottom: calc(var(--space) * 1);
}

.pricing-card .price {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin: calc(var(--space) * 2) 0;
}

.pricing-card .price-label {
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: calc(var(--space) * 4);
}

.pricing-card .pricing-features {
  list-style: none;
  padding: 0;
  flex: 1;
}

.pricing-card .pricing-features li {
  padding: calc(var(--space) * 1.5) 0;
  font-size: 0.85rem;
  color: var(--color-text-primary);
  display: flex;
  gap: calc(var(--space) * 2);
  align-items: baseline;
  border-bottom: 1px solid var(--color-border);
}

.pricing-card .pricing-features li:last-child {
  border-bottom: none;
}

.pricing-card .pricing-features li .check {
  color: var(--color-success);
}

.pricing-card .pricing-features li .planned {
  color: var(--color-warning);
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.pricing-card .pricing-features li .na {
  color: var(--color-text-muted);
  font-family: var(--font-display);
  font-size: 0.8rem;
}

.pricing-card .btn {
  margin-top: calc(var(--space) * 4);
  width: 100%;
}

/* ── Mock checkout form ─────────────────────────────────────────── */
.checkout-form {
  margin-top: calc(var(--space) * 4);
  padding: calc(var(--space) * 6);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  display: none;
}

.checkout-form.visible {
  display: block;
}

.checkout-form .form-row {
  margin-bottom: calc(var(--space) * 3);
}

.checkout-form label {
  display: block;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  margin-bottom: calc(var(--space) * 1);
}

.checkout-form .demo-notice {
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--color-warning);
  font-weight: 500;
  padding: calc(var(--space) * 2) calc(var(--space) * 3);
  border: 1px solid var(--color-warning);
  margin-bottom: calc(var(--space) * 4);
}

.checkout-form .success-state {
  display: none;
  text-align: center;
  padding: calc(var(--space) * 6);
}

.checkout-form .success-state.visible {
  display: block;
}

.checkout-form .success-state .success-icon {
  font-size: 1.5rem;
  color: var(--color-success);
  margin-bottom: calc(var(--space) * 2);
}

/* ── Disclosures ────────────────────────────────────────────────── */
.disclosures {
  margin-top: calc(var(--space) * 8);
  padding: calc(var(--space) * 4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  font-family: var(--font-display);
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.disclosures p {
  margin-bottom: calc(var(--space) * 2);
  max-width: none;
}

.disclosures strong {
  color: var(--color-text-primary);
}

/* ── Legal pages ────────────────────────────────────────────────── */
.legal-page {
  max-width: 700px;
}

.legal-page h1 {
  margin-bottom: calc(var(--space) * 1);
}

.legal-page .last-updated {
  font-family: var(--font-display);
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-bottom: calc(var(--space) * 6);
}

.legal-page h2 {
  margin-top: calc(var(--space) * 6);
  margin-bottom: calc(var(--space) * 2);
}

.legal-page p {
  margin-bottom: calc(var(--space) * 2);
  font-size: 0.9rem;
  max-width: none;
}

.legal-page ul {
  margin: calc(var(--space) * 2) 0 calc(var(--space) * 2) calc(var(--space) * 6);
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

.legal-page ul li {
  margin-bottom: calc(var(--space) * 1);
}

/* ── Status / error banner ──────────────────────────────────────── */
.banner {
  padding: calc(var(--space) * 2) calc(var(--space) * 3);
  font-family: var(--font-display);
  font-size: 0.85rem;
  border-left: 3px solid transparent;
  margin-bottom: calc(var(--space) * 3);
}

.banner.error {
  background: #fef2f2;
  border-left-color: var(--color-error);
  color: var(--color-error);
}

.banner.success {
  background: #f0fdf4;
  border-left-color: var(--color-success);
  color: #166534;
}

.banner.warning {
  background: #fffbeb;
  border-left-color: var(--color-warning);
  color: #92400e;
}

/* ── Loading state ──────────────────────────────────────────────── */
.loading-text {
  font-family: var(--font-display);
  color: var(--color-text-muted);
  font-size: 0.9rem;
  padding: calc(var(--space) * 4) 0;
}

/* ── Responsive ─────────────────────────────────────────────────── */
@media (max-width: 640px) {
  .page-wrapper {
    padding: 0 calc(var(--space) * 3);
  }

  .header-inner {
    padding: 0 calc(var(--space) * 3);
    flex-wrap: wrap;
    gap: calc(var(--space) * 2);
  }

  .footer-inner {
    flex-direction: column;
    gap: calc(var(--space) * 2);
    padding: 0 calc(var(--space) * 3);
  }

  h1 { font-size: 1.4rem; }
  .hero-section h1 { font-size: 1.5rem; }

  .pricing-grid {
    flex-direction: column;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .input-group {
    flex-direction: column;
  }

  .result-box .diag-line {
    flex-direction: column;
    gap: 0;
  }

  .result-box .diag-label {
    min-width: 0;
  }
}