:root {
  --bg: #FBFBFA;
  --ink: #37352F;
  --ink-soft: #6B6B66;
  --border: #E9E7E2;
  --accent: #1A1A18;
  --brand: #4F46E5;
  --brand-soft: #EEF0FF;
  --success: #0F9D58;
  --radius: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.page {
  max-width: 760px;
  margin: 0 auto;
  padding: 64px 24px 96px;
}

/* Header */
.doc-header { margin-bottom: 28px; }

.breadcrumb {
  font-size: 0.82rem;
  color: var(--ink-soft);
  margin-bottom: 18px;
}

.doc-title {
  font-size: 2.6rem;
  font-weight: 800;
  line-height: 1.15;
  margin: 0 0 12px;
  letter-spacing: -0.02em;
}

.doc-subtitle {
  font-size: 1.15rem;
  color: var(--ink-soft);
  margin: 0 0 18px;
  font-weight: 400;
}

.doc-meta { display: flex; gap: 8px; flex-wrap: wrap; }

.pill {
  font-size: 0.78rem;
  background: #F1F0EC;
  border: 1px solid var(--border);
  padding: 4px 10px;
  border-radius: 100px;
  color: var(--ink-soft);
}

/* Callout */
.callout {
  display: flex;
  gap: 14px;
  background: var(--brand-soft);
  border: 1px solid #D9DBFB;
  border-radius: var(--radius);
  padding: 18px 20px;
  margin: 28px 0 36px;
}

.callout-icon { font-size: 1.4rem; line-height: 1; }

.callout strong { display: block; margin-bottom: 6px; font-size: 1.02rem; }

.callout p { margin: 0; color: var(--ink); font-size: 0.96rem; }

/* Prose */
.prose h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 0 14px;
  letter-spacing: -0.01em;
}

.prose p { margin: 0 0 14px; color: var(--ink); font-size: 1rem; }

.prose ol, .prose ul { padding-left: 22px; margin: 0 0 14px; }

.prose li { margin-bottom: 8px; }

.divider {
  height: 1px;
  background: var(--border);
  margin: 40px 0;
}

/* Blocks (Notion-style toggles) */
.blocks { display: flex; flex-direction: column; gap: 10px; margin-bottom: 8px; }

.block {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #fff;
  padding: 4px 18px;
}

.block summary {
  cursor: pointer;
  list-style: none;
  padding: 14px 0;
  font-weight: 600;
  font-size: 1.02rem;
  display: flex;
  align-items: center;
  gap: 10px;
  user-select: none;
}

.block summary::-webkit-details-marker { display: none; }

.block-num {
  font-family: ui-monospace, monospace;
  font-size: 0.8rem;
  color: #fff;
  background: var(--accent);
  border-radius: 5px;
  padding: 2px 7px;
}

.block-toggle {
  margin-left: auto;
  color: var(--ink-soft);
  transition: transform 0.15s ease;
  font-size: 0.9rem;
}

.block[open] .block-toggle { transform: rotate(90deg); }

.block-desc {
  font-size: 0.92rem;
  color: var(--ink-soft);
  margin: 0 0 10px;
  padding-left: 2px;
}

.block ul { padding-left: 20px; margin: 0 0 16px; }

.block li { margin-bottom: 9px; font-size: 0.97rem; }

/* Gate */
.gate { margin: 40px 0; }

.gate-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 32px;
  text-align: center;
}

.gate-icon { font-size: 2rem; margin-bottom: 10px; }

.gate-card h3 {
  font-size: 1.3rem;
  margin: 0 0 20px;
  font-weight: 700;
}

#lead-form {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-width: 380px;
  margin: 0 auto;
}

#lead-form input {
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.96rem;
  font-family: inherit;
  background: var(--bg);
}

#lead-form input:focus { outline: 2px solid var(--brand); outline-offset: 1px; }

#submit-btn, .cta-button {
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 13px 18px;
  border-radius: 8px;
  font-size: 0.98rem;
  font-weight: 600;
  cursor: pointer;
  margin-top: 6px;
  transition: opacity 0.15s ease;
}

#submit-btn:hover, .cta-button:hover { opacity: 0.85; }

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

.gate-fineprint {
  font-size: 0.8rem;
  color: var(--ink-soft);
  margin: 14px 0 0;
}

.gate-error {
  font-size: 0.85rem;
  color: #C0392B;
  margin: 10px 0 0;
  min-height: 0;
}

.prompt-box { text-align: left; }

.prompt-box pre {
  background: #F6F5F2;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  font-size: 0.82rem;
  line-height: 1.55;
  white-space: pre-wrap;
  word-wrap: break-word;
  max-height: 320px;
  overflow-y: auto;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  margin: 0 0 14px;
}

#copy-btn {
  background: var(--brand);
  color: #fff;
  border: none;
  padding: 11px 16px;
  border-radius: 8px;
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  width: 100%;
}

#copy-btn:hover { opacity: 0.9; }

/* Final CTA */
.cta-final {
  text-align: center;
  margin: 56px 0 24px;
}

.cta-final p {
  font-size: 1.05rem;
  color: var(--ink-soft);
  margin-bottom: 16px;
}

.cta-button {
  display: inline-block;
  text-decoration: none;
}

/* Footer */
.doc-footer {
  text-align: center;
  color: var(--ink-soft);
  font-size: 0.82rem;
  margin-top: 48px;
}

@media (max-width: 600px) {
  .page { padding: 40px 18px 64px; }
  .doc-title { font-size: 2rem; }
  .gate-card { padding: 24px 18px; }
}