/* === Brand tokens === */
:root {
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'JetBrains Mono', monospace;
  --font-mono: 'JetBrains Mono', monospace;
  --radius: 2px;
  --space: 8px;

  --color-primary:         #2563EB;
  --color-primary-hover:   #1D4ED8;
  --color-error:           #DC2626;
  --color-success:         #059669;
  --color-bg:              #FAFAFA;
  --color-surface:         #FFFFFF;
  --color-border:          #E5E7EB;
  --color-text-primary:    #111827;
  --color-text-secondary:  #6B7280;
  --color-text-on-primary: #FFFFFF;
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--color-text-primary);
  background: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* === Shared header / navigation === */
.header {
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
}

.header-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--color-text-primary);
}

.logo-text {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.25rem;
  letter-spacing: -0.01em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  list-style: none;
}

.nav-links a {
  font-family: var(--font-body);
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  text-decoration: none;
  padding: 4px 0;
  transition: color 150ms ease;
}

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

.nav-links .nav-cta {
  display: inline-flex;
  align-items: center;
  padding: 8px 16px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.8125rem;
  color: var(--color-text-on-primary);
  background: var(--color-primary);
  border-radius: var(--radius);
  transition: background 150ms ease;
}

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

/* === Shared footer === */
.footer {
  border-top: 1px solid var(--color-border);
  padding: 32px 24px 40px;
  margin-top: auto;
}

.footer-inner {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-start;
  gap: 24px;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-col h4 {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-col a {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color 150ms ease;
}

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

.footer-note {
  font-size: 0.6875rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
  margin-top: 8px;
}

.footer-bottom {
  max-width: 960px;
  margin: 24px auto 0;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
  font-size: 0.6875rem;
  color: var(--color-text-secondary);
  text-align: center;
}

/* === Main content area === */
.main {
  flex: 1;
  max-width: 960px;
  margin: 0 auto;
  padding: 48px 24px 64px;
  width: 100%;
}

.main-narrow {
  max-width: 840px;
}

.main-wide {
  max-width: 960px;
}

/* =============================================
   HOME PAGE — marketing
   ============================================= */
.home-hero {
  text-align: center;
  margin-bottom: 64px;
}

.home-hero-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 2rem;
  line-height: 1.2;
  color: var(--color-text-primary);
  margin-bottom: 16px;
}

.home-hero-subtitle {
  font-family: var(--font-body);
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  max-width: 640px;
  margin: 0 auto 32px;
  line-height: 1.6;
}

.home-cta-row {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* === Feature cards (home page) === */
.home-features {
  display: flex;
  flex-direction: column;
  gap: 32px;
  margin-bottom: 64px;
}

.feature-row {
  display: flex;
  gap: 32px;
  align-items: flex-start;
}

.feature-card {
  flex: 1;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
}

.feature-card-icon {
  display: block;
  margin-bottom: 12px;
  color: var(--color-primary);
}

.feature-card h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  margin-bottom: 8px;
  color: var(--color-text-primary);
}

.feature-card p {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* === Home CTA section === */
.home-cta-section {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 40px 32px;
  text-align: center;
  margin-bottom: 48px;
}

.home-cta-section h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.375rem;
  margin-bottom: 12px;
  color: var(--color-text-primary);
}

.home-cta-section p {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-bottom: 24px;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

/* =============================================
   APP / TOOL PAGE
   ============================================= */
.app-hero {
  margin-bottom: 48px;
}

.app-hero-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.75rem;
  line-height: 1.25;
  color: var(--color-text-primary);
  margin-bottom: 12px;
}

.app-hero-subtitle {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  line-height: 1.6;
  max-width: 640px;
}

/* Tool area */
.tool {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

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

.tab {
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 500;
  padding: 12px 24px;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-text-secondary);
  position: relative;
  transition: color 150ms ease;
}

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

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

.tab-active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-primary);
}

/* Panels */
.panel {
  padding: 32px;
}

.panel[hidden] {
  display: none;
}

.panel-description {
  margin-bottom: 24px;
}

.panel-description p {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

/* Input area */
.input-area {
  margin-bottom: 0;
}

.input-textarea {
  width: 100%;
  min-height: 200px;
  padding: 16px;
  font-family: var(--font-body);
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--color-text-primary);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  resize: vertical;
  outline: none;
  transition: border-color 150ms ease;
}

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

.input-textarea::placeholder {
  color: #9CA3AF;
}

.url-input-group {
  display: flex;
  gap: 12px;
}

.input-url {
  flex: 1;
  padding: 12px 16px;
  font-family: var(--font-body);
  font-size: 0.875rem;
  color: var(--color-text-primary);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  outline: none;
  transition: border-color 150ms ease;
}

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

.input-url::placeholder {
  color: #9CA3AF;
}

.input-note {
  margin-top: 12px;
  font-size: 0.75rem;
  color: #9CA3AF;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.875rem;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 150ms ease, opacity 150ms ease;
  white-space: nowrap;
  text-decoration: none;
  line-height: 1;
}

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

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

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

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

.btn-secondary:hover {
  background: #F3F4F6;
}

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

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

.btn-large {
  padding: 14px 32px;
  font-size: 1rem;
}

.btn-clear {
  background: none;
  border: none;
  font-family: var(--font-body);
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  cursor: pointer;
  padding: 4px 8px;
  border-radius: var(--radius);
  transition: color 150ms ease, background 150ms ease;
}

.btn-clear:hover {
  color: var(--color-text-primary);
  background: #F3F4F6;
}

/* Result area */
.result-area {
  margin-top: 24px;
  opacity: 0;
  transition: opacity 200ms ease-in;
}

.result-area.visible {
  opacity: 1;
}

.result-area.hidden {
  display: none;
}

.result-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.result-label {
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.result-content {
  padding: 16px;
  font-family: var(--font-body);
  font-size: 0.8125rem;
  line-height: 1.6;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 500px;
  overflow-y: auto;
}

/* Result severity colors */
.result-error {
  border-left: 3px solid var(--color-error);
  padding-left: 13px;
}

.result-success {
  border-left: 3px solid var(--color-success);
  padding-left: 13px;
}

.result-warning {
  border-left: 3px solid #D97706;
  padding-left: 13px;
}

/* Error location highlight */
.error-location {
  color: var(--color-error);
  font-weight: 700;
}

.error-expected {
  color: var(--color-text-secondary);
}

/* Status tag */
.status-tag {
  display: inline-block;
  padding: 2px 8px;
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: var(--radius);
  margin-right: 8px;
}

.status-tag-2xx { background: #D1FAE5; color: #065F46; }
.status-tag-3xx { background: #FEF3C7; color: #92400E; }
.status-tag-4xx { background: #FEE2E2; color: #991B1B; }
.status-tag-5xx { background: #FFE4E6; color: #9F1239; }
.status-tag-other { background: #F3F4F6; color: #374151; }

/* Inline indicator */
.inline-indicator {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 0;
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
}

.inline-indicator::before {
  content: '';
  width: 12px;
  height: 12px;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 600ms linear infinite;
}

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

/* =============================================
   PRICING PAGE
   ============================================= */
.pricing-header {
  text-align: center;
  margin-bottom: 48px;
}

.pricing-header h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 2rem;
  line-height: 1.2;
  color: var(--color-text-primary);
  margin-bottom: 12px;
}

.pricing-header p {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.6;
}

.pricing-grid {
  display: flex;
  gap: 24px;
  justify-content: center;
  align-items: stretch;
  margin-bottom: 48px;
}

.pricing-card {
  flex: 1;
  max-width: 340px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  position: relative;
}

.pricing-card.featured {
  border-color: var(--color-primary);
  box-shadow: 0 1px 6px rgba(37, 99, 235, 0.1);
}

.pricing-card-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-primary);
  color: var(--color-text-on-primary);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.6875rem;
  padding: 4px 12px;
  border-radius: var(--radius);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.pricing-card h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.125rem;
  color: var(--color-text-primary);
  margin-bottom: 8px;
}

.pricing-card .plan-tagline {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  margin-bottom: 16px;
}

.pricing-card .plan-price {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 2rem;
  color: var(--color-text-primary);
  margin-bottom: 4px;
}

.pricing-card .plan-price-period {
  font-family: var(--font-body);
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  margin-bottom: 20px;
}

.pricing-card .plan-features {
  list-style: none;
  margin-bottom: 24px;
  flex: 1;
}

.pricing-card .plan-features li {
  font-size: 0.8125rem;
  color: var(--color-text-primary);
  padding: 6px 0;
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.pricing-card .plan-features li .feat-marker {
  flex-shrink: 0;
  width: 16px;
  text-align: center;
  color: var(--color-success);
}

.pricing-card .plan-features li .feat-marker.muted {
  color: var(--color-text-secondary);
}

.pricing-card .plan-features li .feat-status {
  font-size: 0.6875rem;
  color: var(--color-text-secondary);
  font-style: italic;
}

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

/* === Mock checkout modal === */
.checkout-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  z-index: 100;
  justify-content: center;
  align-items: center;
  padding: 24px;
}

.checkout-overlay.active {
  display: flex;
}

.checkout-modal {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px;
  width: 100%;
  max-width: 400px;
  position: relative;
}

.checkout-modal h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.125rem;
  color: var(--color-text-primary);
  margin-bottom: 8px;
}

.checkout-modal .checkout-demo-notice {
  font-size: 0.75rem;
  color: var(--color-primary);
  margin-bottom: 20px;
  padding: 8px 12px;
  background: #EFF6FF;
  border: 1px solid #BFDBFE;
  border-radius: var(--radius);
}

.checkout-modal .checkout-field {
  margin-bottom: 16px;
}

.checkout-modal .checkout-field label {
  display: block;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 4px;
}

.checkout-modal .checkout-field input {
  width: 100%;
  padding: 10px 12px;
  font-family: var(--font-body);
  font-size: 0.875rem;
  color: var(--color-text-primary);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  outline: none;
  transition: border-color 150ms ease;
}

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

.checkout-modal .checkout-row {
  display: flex;
  gap: 12px;
}

.checkout-modal .checkout-row .checkout-field {
  flex: 1;
}

.checkout-modal .checkout-actions {
  display: flex;
  gap: 12px;
  margin-top: 24px;
}

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

/* Success state */
.checkout-success {
  display: none;
  text-align: center;
  padding: 24px 0;
}

.checkout-success.active {
  display: block;
}

.checkout-success .success-icon {
  font-size: 2.5rem;
  margin-bottom: 12px;
  display: block;
}

.checkout-success h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.125rem;
  color: var(--color-text-primary);
  margin-bottom: 8px;
}

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

/* =============================================
   LEGAL PAGES (privacy, terms)
   ============================================= */
.legal-page {
  max-width: 720px;
  margin: 0 auto;
}

.legal-page h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.75rem;
  color: var(--color-text-primary);
  margin-bottom: 8px;
}

.legal-page .legal-date {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  margin-bottom: 32px;
}

.legal-page h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.125rem;
  color: var(--color-text-primary);
  margin-top: 32px;
  margin-bottom: 8px;
}

.legal-page h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  color: var(--color-text-primary);
  margin-top: 24px;
  margin-bottom: 8px;
}

.legal-page p,
.legal-page li {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 12px;
}

.legal-page ul {
  padding-left: 24px;
  margin-bottom: 16px;
}

.legal-page ul li {
  margin-bottom: 6px;
}

.legal-page .legal-notice {
  background: #FEFCE8;
  border: 1px solid #FDE68A;
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 24px;
  font-size: 0.8125rem;
  color: #713F12;
  line-height: 1.6;
}

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 768px) {
  .pricing-grid {
    flex-direction: column;
    align-items: center;
  }

  .pricing-card {
    max-width: 100%;
    width: 100%;
  }

  .feature-row {
    flex-direction: column;
  }

  .header-inner {
    flex-wrap: wrap;
    gap: 12px;
  }

  .nav-links {
    gap: 16px;
    flex-wrap: wrap;
  }
}

@media (max-width: 600px) {
  .main { padding: 32px 16px 48px; }
  .panel { padding: 24px 16px; }
  .home-hero-title { font-size: 1.5rem; }
  .app-hero-title { font-size: 1.375rem; }
  .pricing-header h1 { font-size: 1.5rem; }
  .url-input-group { flex-direction: column; }
  .tab { padding: 12px 16px; font-size: 0.75rem; }
  .footer-inner { flex-direction: column; gap: 16px; }
  .home-cta-row { flex-direction: column; align-items: center; }
  .home-cta-row .btn { width: 100%; max-width: 280px; }
  .legal-page h1 { font-size: 1.375rem; }
}