/* ── Fonts ────────────────────────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400&family=IBM+Plex+Sans:wght@400&family=Space+Grotesk:wght@400;500&display=swap');

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

:root {
  /* Brand tokens */
  --color-primary: #0a0a0a;
  --color-primary-hover: #000000;
  --color-danger: #cc0000;
  --color-danger-surface: #fff5f5;
  --color-success: #006600;
  --color-success-surface: #f0faf0;
  --color-warning: #9a7b00;
  --color-warning-surface: #fffbeb;
  --color-text: #111111;
  --color-text-secondary: #5a5a5a;
  --color-text-muted: #8a8a8a;
  --color-bg: #ffffff;
  --color-surface: #f4f4f4;
  --color-border: #d4d4d4;
  --color-border-strong: #888888;
  --color-brutal-border: #000000;

  /* Typography */
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'IBM Plex Sans', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;

  /* Spacing (4px grid) */
  --space: 4px;

  /* Radius — brutalist means sharp */
  --radius: 0px;

  /* Max widths */
  --content-max: 720px;
  --content-wide: 960px;
}

body {
  font-family: var(--font-body);
  font-weight: 400;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── Shared site header ───────────────────────────────────────────────── */
.site-header {
  border-bottom: 1px solid var(--color-border);
  padding: calc(var(--space) * 4) calc(var(--space) * 4);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: calc(var(--space) * 4);
  flex-wrap: wrap;
}

.site-header .brand {
  display: flex;
  align-items: center;
  gap: calc(var(--space) * 2);
  text-decoration: none;
  color: var(--color-primary);
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.2rem;
}

.site-header .brand:hover {
  color: var(--color-primary-hover);
}

.header-nav {
  display: flex;
  align-items: center;
  gap: calc(var(--space) * 1);
  flex-wrap: wrap;
}

.header-nav a {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  padding: calc(var(--space) * 1) calc(var(--space) * 2);
  transition: color 150ms ease;
}

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

.header-nav a.active {
  color: var(--color-primary);
  font-weight: 500;
}

/* ── Shared site footer ──────────────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  font-size: 0.8rem;
  padding: calc(var(--space) * 6) calc(var(--space) * 4);
  margin-top: auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: calc(var(--space) * 3);
}

.site-footer a {
  color: var(--color-text-secondary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

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

.footer-links {
  display: flex;
  gap: calc(var(--space) * 3);
}

/* ── Main content area ───────────────────────────────────────────────── */
main {
  flex: 1;
  width: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: calc(var(--space) * 8) calc(var(--space) * 4);
}

main.wide {
  max-width: var(--content-wide);
}

section {
  margin-bottom: calc(var(--space) * 12);
}

section:last-child {
  margin-bottom: 0;
}

/* ── Headings ─────────────────────────────────────────────────────────── */
h1, h2, h3 {
  font-family: var(--font-display);
  color: var(--color-primary);
}

h1 {
  font-weight: 500;
  font-size: 2rem;
  line-height: 1.25;
  margin-bottom: calc(var(--space) * 3);
}

h2 {
  font-weight: 400;
  font-size: 1.4rem;
  margin-bottom: calc(var(--space) * 3);
}

h3 {
  font-weight: 400;
  font-size: 1.1rem;
  margin-bottom: calc(var(--space) * 2);
}

/* ── Hero section (home page) ─────────────────────────────────────────── */
.hero {
  border-bottom: 1px solid var(--color-brutal-border);
  padding-bottom: calc(var(--space) * 8);
  margin-bottom: calc(var(--space) * 8);
}

.hero h1 {
  font-size: 2.4rem;
  max-width: 600px;
}

.hero p {
  font-size: 1.05rem;
  color: var(--color-text-secondary);
  max-width: 600px;
  margin-bottom: calc(var(--space) * 2);
}

.hero .cta-group {
  display: flex;
  gap: calc(var(--space) * 2);
  margin-top: calc(var(--space) * 6);
  flex-wrap: wrap;
}

.cta-primary {
  display: inline-block;
  background: var(--color-primary);
  color: var(--color-bg);
  text-decoration: none;
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 1rem;
  padding: calc(var(--space) * 3) calc(var(--space) * 8);
  border: 1px solid var(--color-primary);
  cursor: pointer;
  transition: background 150ms ease, color 150ms ease;
  text-align: center;
}

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

.cta-secondary {
  display: inline-block;
  background: transparent;
  color: var(--color-primary);
  text-decoration: none;
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 1rem;
  padding: calc(var(--space) * 3) calc(var(--space) * 8);
  border: 1px solid var(--color-border-strong);
  cursor: pointer;
  transition: border-color 150ms ease, color 150ms ease;
  text-align: center;
}

.cta-secondary:hover {
  border-color: var(--color-primary);
  color: var(--color-primary-hover);
}

/* ── Feature list (stacked, not card grid) ────────────────────────────── */
.feature-list-stacked {
  list-style: none;
  padding: 0;
}

.feature-list-stacked li {
  padding: calc(var(--space) * 4) 0;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  gap: calc(var(--space) * 3);
  align-items: flex-start;
}

.feature-list-stacked li:last-child {
  border-bottom: none;
}

.feature-list-stacked .feature-marker {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-text-muted);
  flex-shrink: 0;
  min-width: 24px;
}

.feature-list-stacked .feature-content {
  flex: 1;
}

.feature-list-stacked .feature-title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 0.95rem;
  margin-bottom: calc(var(--space) * 1);
}

.feature-list-stacked .feature-desc {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
}

/* ── Probe form ──────────────────────────────────────────────────────── */
.probe-form {
  border: 1px solid var(--color-border);
  padding: calc(var(--space) * 6);
  margin-bottom: calc(var(--space) * 6);
}

#probe-form {
  display: flex;
  flex-wrap: wrap;
  gap: calc(var(--space) * 3);
  align-items: flex-end;
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: calc(var(--space) * 1);
}

.input-group label {
  font-size: 0.8rem;
  font-weight: 400;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.input-group input {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 1rem;
  padding: calc(var(--space) * 2) calc(var(--space) * 3);
  background: var(--color-bg);
  color: var(--color-text);
  transition: border-color 150ms ease;
}

.input-group input:focus {
  border-color: var(--color-border-strong);
  outline: none;
}

#hostname { flex: 1; min-width: 200px; }
#port { width: 90px; }

#check-btn {
  background: var(--color-primary);
  color: var(--color-bg);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 1rem;
  padding: calc(var(--space) * 2) calc(var(--space) * 6);
  cursor: pointer;
  white-space: nowrap;
  transition: background 150ms ease;
}

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

#check-btn:disabled {
  background: var(--color-border);
  border-color: var(--color-border);
  color: var(--color-text-muted);
  cursor: not-allowed;
}

.cloudflare-note {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-top: calc(var(--space) * 2);
  padding: calc(var(--space) * 2) calc(var(--space) * 3);
  border: 1px solid var(--color-border);
}

/* ── Result area ──────────────────────────────────────────────────────── */
.result-area {
  border: 1px solid var(--color-border);
  padding: calc(var(--space) * 6);
}

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

#result-status {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.1rem;
  margin-bottom: calc(var(--space) * 4);
  padding-bottom: calc(var(--space) * 3);
  border-bottom: 1px solid var(--color-border);
}

.status-ok { color: var(--color-success); }
.status-warning { color: var(--color-warning); }
.status-error { color: var(--color-danger); }

.result-detail-row {
  display: flex;
  gap: calc(var(--space) * 2);
  padding: calc(var(--space) * 2) 0;
  border-bottom: 1px solid var(--color-border);
  align-items: baseline;
}

.result-detail-row:last-child {
  border-bottom: none;
}

.result-label {
  color: var(--color-text-secondary);
  font-size: 0.85rem;
  flex-shrink: 0;
  min-width: 180px;
}

.result-value {
  font-family: var(--font-body);
  font-size: 0.9rem;
  word-break: break-all;
}

.result-value.mono {
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.result-value.expired {
  color: var(--color-danger);
}

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

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

/* Hard left border for failure results */
.result-fail-border {
  border-left: 4px solid var(--color-danger);
  padding-left: calc(var(--space) * 3);
}

.result-warn-border {
  border-left: 4px solid var(--color-warning);
  padding-left: calc(var(--space) * 3);
}

/* ── Chain section ────────────────────────────────────────────────────── */
.chain-section {
  margin-top: calc(var(--space) * 6);
  border-top: 2px solid var(--color-brutal-border);
  padding-top: calc(var(--space) * 4);
}

.chain-section h3 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1rem;
  margin-bottom: calc(var(--space) * 3);
}

.chain-item {
  border: 1px solid var(--color-border);
  padding: calc(var(--space) * 3);
  margin-bottom: calc(var(--space) * 2);
  font-size: 0.85rem;
}

.chain-item.incomplete {
  border-left: 4px solid var(--color-danger);
}

.chain-item-row {
  display: flex;
  gap: calc(var(--space) * 2);
  margin-bottom: calc(var(--space) * 1);
  align-items: baseline;
}

.chain-item-row:last-child { margin-bottom: 0; }

.chain-item-label {
  color: var(--color-text-secondary);
  flex-shrink: 0;
  min-width: 90px;
  font-size: 0.82rem;
}

/* ── Error display ────────────────────────────────────────────────────── */
.error-detail {
  font-size: 0.9rem;
  padding: calc(var(--space) * 3);
  border-left: 4px solid var(--color-danger);
  background: var(--color-danger-surface);
}

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

.pricing-card {
  flex: 1;
  min-width: 260px;
  border: 1px solid var(--color-border);
  padding: calc(var(--space) * 6);
  display: flex;
  flex-direction: column;
}

.pricing-card.featured {
  border: 2px solid var(--color-brutal-border);
}

.pricing-card h3 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.3rem;
  margin-bottom: calc(var(--space) * 2);
}

.pricing-card .price {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 2rem;
  margin-bottom: calc(var(--space) * 4);
}

.pricing-card .price .period {
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  font-weight: 400;
}

.pricing-card ul {
  list-style: none;
  padding: 0;
  margin-bottom: calc(var(--space) * 6);
  flex: 1;
}

.pricing-card ul li {
  padding: calc(var(--space) * 2) 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

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

.pricing-card ul li .checkmark {
  color: var(--color-success);
  margin-right: calc(var(--space) * 1);
}

.pricing-card ul li .planned {
  color: var(--color-text-muted);
  font-size: 0.75rem;
  margin-left: calc(var(--space) * 1);
}

.pricing-card .cta-primary:disabled {
  background: var(--color-border);
  border-color: var(--color-border);
  color: var(--color-text-muted);
  cursor: not-allowed;
  pointer-events: auto;
}

.pricing-card .cta-primary:disabled:hover {
  background: var(--color-border);
}

/* ── Demo checkout mockup ─────────────────────────────────────────────── */
.demo-checkout-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0,0,0,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.demo-checkout-overlay[hidden] {
  display: none;
}

.demo-checkout-card {
  background: var(--color-bg);
  border: 2px solid var(--color-brutal-border);
  padding: calc(var(--space) * 8);
  max-width: 400px;
  width: 90%;
}

.demo-checkout-card h3 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.2rem;
  margin-bottom: calc(var(--space) * 3);
}

.demo-checkout-card .demo-badge {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  padding: calc(var(--space) * 1) calc(var(--space) * 2);
  margin-bottom: calc(var(--space) * 4);
  display: inline-block;
}

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

.demo-checkout-card .form-field label {
  display: block;
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: calc(var(--space) * 1);
}

.demo-checkout-card .form-field input {
  width: 100%;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 1rem;
  padding: calc(var(--space) * 2) calc(var(--space) * 3);
}

.demo-checkout-card .demo-submit {
  width: 100%;
  margin-top: calc(var(--space) * 3);
}

.demo-checkout-card .close-btn {
  display: block;
  margin-top: calc(var(--space) * 2);
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  font-family: var(--font-body);
  font-size: 0.9rem;
  padding: calc(var(--space) * 2) calc(var(--space) * 4);
  cursor: pointer;
  width: 100%;
  text-align: center;
}

.demo-checkout-card .close-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.demo-success-message {
  text-align: center;
  padding: calc(var(--space) * 6) 0;
}

.demo-success-message h3 {
  color: var(--color-success);
  margin-bottom: calc(var(--space) * 2);
}

.demo-success-message p {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
}

/* ── About / info prose sections ──────────────────────────────────────── */
.info-section p {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  margin-bottom: calc(var(--space) * 2);
}

.info-section p:last-child {
  margin-bottom: 0;
}

/* ── Legal / privacy / terms pages ─────────────────────────────────────── */
.legal-section {
  margin-bottom: calc(var(--space) * 8);
}

.legal-section h2 {
  border-bottom: 1px solid var(--color-brutal-border);
  padding-bottom: calc(var(--space) * 2);
}

.legal-section p {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  margin-bottom: calc(var(--space) * 2);
  line-height: 1.7;
}

.legal-section ul {
  list-style: none;
  padding: 0;
  margin-bottom: calc(var(--space) * 2);
}

.legal-section ul li {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  padding: calc(var(--space) * 1) 0;
  padding-left: calc(var(--space) * 3);
  position: relative;
}

.legal-section ul li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--color-text-muted);
}

.legal-section .legal-note {
  border: 1px solid var(--color-border);
  padding: calc(var(--space) * 3);
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: calc(var(--space) * 3);
}

/* ── Responsive ───────────────────────────────────────────────────────── */
@media (max-width: 600px) {
  main {
    padding: calc(var(--space) * 4) calc(var(--space) * 3);
  }

  h1 { font-size: 1.6rem; }
  .hero h1 { font-size: 1.8rem; }

  .site-header {
    flex-direction: column;
    align-items: flex-start;
    gap: calc(var(--space) * 2);
  }

  .site-footer {
    flex-direction: column;
    text-align: center;
  }

  .footer-links {
    justify-content: center;
  }

  #probe-form { flex-direction: column; }
  #port { width: 100%; }
  #hostname { width: 100%; }
  #check-btn { width: 100%; }

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

  .result-label { min-width: 100px; }
  .result-detail-row { flex-direction: column; gap: calc(var(--space) * 1); }

  .hero .cta-group { flex-direction: column; }
  .cta-primary, .cta-secondary { width: 100%; text-align: center; }
}