/* ============================================================
   Parseproof — Brand-compliant stylesheet
   Tokens derived from assets/brand.md (binding, not advisory)
   ============================================================ */

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

/* ─── Google Fonts ─────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=DM+Serif+Display:ital@0;1&family=DM+Sans:wght@400;500;600;700&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

/* ─── CSS Custom Properties (brand spec tokens) ────────────── */
:root {
  /* Brand palette */
  --color-primary: #D97706;        /* Amber-600 */
  --color-primary-hover: #B45309;  /* Amber-700 */
  --color-error: #DC2626;          /* Red-600 */
  --color-warning: #D97706;        /* Amber-600 */
  --color-success: #059669;        /* Emerald-600 */
  --color-surface: #FFFFFF;
  --color-surface-secondary: #F8FAFC;  /* Slate-50 */
  --color-surface-code: #F1F5F9;       /* Slate-100 */
  --color-border: #E2E8F0;             /* Slate-200 */
  --color-text-primary: #1E293B;       /* Slate-800 */
  --color-text-secondary: #64748B;     /* Slate-500 */
  --color-text-code: #0F172A;          /* Slate-900 */

  /* Typography */
  --font-display: 'DM Serif Display', Georgia, serif;
  --font-body: 'DM Sans', sans-serif;
  --font-mono: 'IBM Plex Mono', 'Consolas', 'Monaco', monospace;

  /* Spacing & radius */
  --radius: 2px;
  --space: 4px;

  /* Layout */
  --content-max-width: 880px;
  --measure-max: 72ch;

  /* Transitions */
  --transition-duration: 150ms;
  --transition-easing: ease-out;
}

/* ─── Base typography ──────────────────────────────────────── */
html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--color-text-primary);
  background: var(--color-surface);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

img { max-width: 100%; height: auto; display: block; }

a { color: var(--color-primary); text-decoration: none; }
a:hover { color: var(--color-primary-hover); text-decoration: underline; }

/* ─── Shared nav ───────────────────────────────────────────── */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: var(--color-text-primary);
}

.nav-logo:hover {
  text-decoration: none;
  color: var(--color-text-primary);
}

.nav-logo img {
  display: block;
}

.nav-logo .wordmark {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 1.125rem;
  letter-spacing: -0.01em;
  color: var(--color-text-primary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}

.nav-links a {
  display: block;
  padding: 6px 14px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  border-radius: var(--radius);
  transition: background-color var(--transition-duration) var(--transition-easing),
              color var(--transition-duration) var(--transition-easing);
}

.nav-links a:hover {
  background: var(--color-surface-secondary);
  color: var(--color-text-primary);
  text-decoration: none;
}

.nav-links .nav-cta {
  background: var(--color-primary);
  color: #fff;
  font-weight: 600;
}

.nav-links .nav-cta:hover {
  background: var(--color-primary-hover);
  color: #fff;
}

/* ─── Footer ───────────────────────────────────────────────── */
.footer {
  margin-top: auto;
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
  padding: 32px 24px 24px;
}

.footer-inner {
  max-width: var(--content-max-width);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 20px;
}

.footer-col h4 {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-secondary);
  margin-bottom: 10px;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-col a {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

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

.footer-copyright {
  max-width: var(--content-max-width);
  margin: 20px auto 0;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
  font-size: 0.75rem;
  color: var(--color-text-secondary);
}

/* ─── Page layouts ─────────────────────────────────────────── */
.page {
  flex: 1;
}

.page-section {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: 48px 24px;
}

.page-section-narrow {
  max-width: var(--measure-max);
  margin: 0 auto;
  padding: 48px 24px;
}

/* ─── Typographic scale ────────────────────────────────────── */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 400;
  color: var(--color-text-primary);
  line-height: 1.3;
}

h1 { font-size: 2.5rem; margin-bottom: 16px; }
h2 { font-size: 1.75rem; margin-bottom: 12px; }
h3 { font-size: 1.25rem; margin-bottom: 8px; }
h4 { font-size: 1rem; margin-bottom: 6px; }

p { margin-bottom: 12px; max-width: var(--measure-max); }
p + p { margin-top: -4px; }

code, .code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: var(--color-surface-code);
  padding: 1px 5px;
  border-radius: var(--radius);
  color: var(--color-text-code);
}

pre {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.55;
  background: var(--color-surface-code);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 16px;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-all;
}

/* ─── Buttons ──────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 22px;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 600;
  color: #fff;
  background: var(--color-primary);
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background-color var(--transition-duration) var(--transition-easing);
  text-decoration: none;
  line-height: 1.4;
}

.btn:hover {
  background: var(--color-primary-hover);
  text-decoration: none;
  color: #fff;
}

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

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

.btn-sm {
  padding: 6px 14px;
  font-size: 0.8125rem;
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  pointer-events: none;
}

/* ─── Hero ─────────────────────────────────────────────────── */
.hero {
  padding: 72px 24px 48px;
  text-align: center;
  background: var(--color-surface);
}

.hero h1 {
  font-size: 2.75rem;
  max-width: 720px;
  margin: 0 auto 16px;
}

.hero .subtitle {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto 32px;
  line-height: 1.5;
}

.hero-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ─── Features grid ────────────────────────────────────────── */
.features {
  background: var(--color-surface-secondary);
}

.features h2 {
  text-align: center;
  margin-bottom: 36px;
}

.features-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}

.feature-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px;
}

.feature-card h3 {
  font-family: var(--font-body);
  font-weight: 600;
  margin-bottom: 6px;
}

.feature-card p {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  max-width: none;
}

/* ─── Two-mode showcase ────────────────────────────────────── */
.mode-showcase {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  margin-top: 20px;
}

.mode-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px;
  background: var(--color-surface-secondary);
}

.mode-card h3 {
  font-family: var(--font-body);
  font-weight: 600;
  margin-bottom: 8px;
}

.mode-card p {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  max-width: none;
}

.mode-card .mode-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 2px 8px;
  border-radius: var(--radius);
  background: var(--color-surface-code);
  color: var(--color-text-secondary);
  margin-bottom: 10px;
}

/* ─── App page ─────────────────────────────────────────────── */
.app-container {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: 24px;
}

.app-header {
  margin-bottom: 24px;
}

.app-header h1 {
  font-size: 1.75rem;
  margin-bottom: 4px;
}

.app-header p {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  max-width: none;
}

/* Input panel */
.input-panel {
  background: var(--color-surface-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
}

.tabs {
  display: flex;
  gap: 0;
  margin-bottom: 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}

.tab {
  flex: 1;
  padding: 8px 16px;
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  background: var(--color-surface);
  border: none;
  cursor: pointer;
  transition: background-color var(--transition-duration) var(--transition-easing),
              color var(--transition-duration) var(--transition-easing);
}

.tab:not(:last-child) {
  border-right: 1px solid var(--color-border);
}

.tab:hover {
  background: var(--color-surface-code);
  color: var(--color-text-primary);
}

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

/* Textarea */
textarea {
  width: 100%;
  min-height: 130px;
  padding: 12px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-text-code);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.55;
  resize: vertical;
  outline: none;
  transition: border-color var(--transition-duration) var(--transition-easing);
}

textarea:focus {
  border-color: var(--color-primary);
}

textarea::placeholder {
  color: #94A3B8;
}

/* URL input */
.url-row {
  display: flex;
  gap: 8px;
}

.url-input {
  flex: 1;
  padding: 10px 12px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-text-code);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  outline: none;
  transition: border-color var(--transition-duration) var(--transition-easing);
}

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

.url-input::placeholder {
  color: #94A3B8;
}

.helper {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  margin-top: 8px;
}

.helper strong {
  font-weight: 600;
}

.action-row {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-top: 14px;
}

/* Results */
.results {
  display: none;
  flex-direction: column;
  gap: 16px;
}

.results.visible {
  display: flex;
}

.result-section {
  background: var(--color-surface-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
}

.result-section h3 {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-secondary);
  margin-bottom: 12px;
}

/* Status badge */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
}

.status-badge.ok {
  background: rgba(5, 150, 105, 0.1);
  color: var(--color-success);
}

.status-badge.error {
  background: rgba(220, 38, 38, 0.1);
  color: var(--color-error);
}

.status-badge.warn {
  background: rgba(217, 119, 6, 0.1);
  color: var(--color-warning);
}

/* Error marker / pinpointing */
.error-marker {
  background: rgba(220, 38, 38, 0.06);
  border-left: 3px solid var(--color-error);
  padding: 12px 16px;
  margin-top: 8px;
}

.error-marker .line-col {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--color-error);
  font-weight: 600;
}

.error-marker .context {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--color-text-code);
  margin-top: 6px;
  white-space: pre-wrap;
  word-break: break-all;
}

.error-marker .arrow {
  color: var(--color-error);
  font-weight: 600;
}

.error-marker .explanation {
  margin-top: 8px;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

/* JSON display block */
.json-display {
  background: var(--color-surface-code);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 12px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.5;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-all;
  max-height: 400px;
  overflow-y: auto;
  color: var(--color-text-code);
  margin-top: 8px;
}

/* Headers table */
.headers-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  margin-top: 8px;
}

.headers-table th,
.headers-table td {
  text-align: left;
  padding: 6px 8px;
  border-bottom: 1px solid var(--color-border);
}

.headers-table th {
  color: var(--color-text-secondary);
  font-weight: 600;
  width: 28%;
  vertical-align: top;
}

.headers-table td {
  word-break: break-all;
}

/* Upstream note */
.upstream-note {
  padding: 10px 14px;
  background: rgba(217, 119, 6, 0.08);
  border: 1px solid rgba(217, 119, 6, 0.25);
  border-radius: var(--radius);
  font-size: 0.82rem;
  color: var(--color-warning);
  margin-top: 8px;
  line-height: 1.45;
}

/* Cloudflare notice */
.cf-notice {
  padding: 12px 16px;
  background: rgba(220, 38, 38, 0.08);
  border: 1px solid rgba(220, 38, 38, 0.2);
  border-radius: var(--radius);
  color: var(--color-error);
  font-size: 0.85rem;
  margin-top: 8px;
  line-height: 1.45;
}

.cf-notice strong {
  display: block;
  margin-bottom: 4px;
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: 32px 16px;
  color: var(--color-text-secondary);
}

.empty-state .icon {
  font-family: var(--font-mono);
  font-size: 2rem;
  margin-bottom: 8px;
  opacity: 0.5;
}

/* Privacy note in app */
.privacy-note {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  margin-top: 16px;
  padding: 10px 14px;
  background: var(--color-surface-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  line-height: 1.45;
}

/* Loading state */
.loading-text {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

/* ─── Pricing page ─────────────────────────────────────────── */
.pricing-intro {
  text-align: center;
  padding: 48px 24px 32px;
}

.pricing-intro h1 {
  margin-bottom: 8px;
}

.pricing-intro p {
  color: var(--color-text-secondary);
  margin: 0 auto;
  font-size: 1rem;
}

.plans {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  max-width: 700px;
  margin: 0 auto;
  padding: 0 24px 48px;
}

.plan-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px;
  background: var(--color-surface);
}

.plan-card.featured {
  border-color: var(--color-primary);
  background: var(--color-surface-secondary);
}

.plan-name {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 1.125rem;
  margin-bottom: 4px;
}

.plan-price {
  font-family: var(--font-display);
  font-size: 2.25rem;
  line-height: 1.2;
  color: var(--color-text-primary);
  margin-bottom: 4px;
}

.plan-price .period {
  font-family: var(--font-body);
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  font-weight: 400;
}

.plan-desc {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-bottom: 20px;
}

.plan-features {
  list-style: none;
  margin-bottom: 24px;
}

.plan-features li {
  font-size: 0.875rem;
  padding: 6px 0;
  color: var(--color-text-primary);
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.plan-features .check {
  color: var(--color-success);
  font-weight: 700;
  flex-shrink: 0;
}

.plan-features .planned {
  color: var(--color-text-secondary);
  font-size: 0.75rem;
  font-style: italic;
  display: inline;
  margin-left: 2px;
}

.plan-features .unavailable {
  color: #CBD5E1;
}

.plan-card .btn {
  width: 100%;
}

/* ─── Mock checkout ────────────────────────────────────────── */
.checkout-section {
  max-width: 520px;
  margin: 0 auto;
  padding: 0 24px 48px;
}

.checkout-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px;
}

.checkout-card h2 {
  font-size: 1.25rem;
  margin-bottom: 4px;
}

.checkout-card .demo-notice {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  margin-bottom: 20px;
  padding: 8px 12px;
  background: rgba(217, 119, 6, 0.08);
  border: 1px solid rgba(217, 119, 6, 0.25);
  border-radius: var(--radius);
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--color-text-primary);
}

.form-group input {
  width: 100%;
  padding: 10px 12px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 0.875rem;
  color: var(--color-text-primary);
  outline: none;
  transition: border-color var(--transition-duration) var(--transition-easing);
}

.form-group input:focus {
  border-color: var(--color-primary);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

/* ─── Legal pages ──────────────────────────────────────────── */
.legal-page h1 {
  margin-bottom: 6px;
}

.legal-page .last-updated {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  margin-bottom: 28px;
}

.legal-page h2 {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 1.125rem;
  margin-top: 28px;
  margin-bottom: 8px;
}

.legal-page p, .legal-page li {
  font-size: 0.9375rem;
  color: var(--color-text-primary);
  max-width: var(--measure-max);
}

.legal-page ul, .legal-page ol {
  padding-left: 20px;
  margin-bottom: 12px;
}

.legal-page li {
  margin-bottom: 4px;
}

.legal-page .notice-missing {
  padding: 12px 16px;
  background: rgba(217, 119, 6, 0.08);
  border: 1px solid rgba(217, 119, 6, 0.25);
  border-radius: var(--radius);
  font-size: 0.875rem;
  color: var(--color-text-primary);
  margin-bottom: 20px;
}

/* ─── Responsive ───────────────────────────────────────────── */
@media (max-width: 700px) {
  h1 { font-size: 1.75rem; }
  h2 { font-size: 1.375rem; }
  .hero h1 { font-size: 2rem; }
  .hero { padding: 48px 20px 32px; }

  .features-grid { grid-template-columns: 1fr; }
  .mode-showcase { grid-template-columns: 1fr; }

  .plans { grid-template-columns: 1fr; max-width: 400px; }
  .form-row { grid-template-columns: 1fr; }

  .nav { flex-wrap: wrap; gap: 10px; }
  .nav-links { flex-wrap: wrap; }
  .footer-inner { flex-direction: column; gap: 24px; }
}

@media (max-width: 480px) {
  .page-section { padding: 32px 16px; }
  .page-section-narrow { padding: 32px 16px; }
  .app-container { padding: 16px; }
  .input-panel { padding: 16px; }
  .url-row { flex-direction: column; }
}