:root {
  color-scheme: light;
  --blue: #0f6cbd;
  --blue-2: #1976d2;
  --green: #2e7d32;
  --bg: #f7f9fc;
  --white: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --line: #e5e7eb;
  --line-strong: #cbd5e1;
  --shadow: 0 18px 42px rgba(15, 108, 189, 0.12);
  --radius: 8px;
  --container: 1160px;
  --notebook-line: rgba(15, 108, 189, 0.11);
  --notebook-grid: linear-gradient(var(--notebook-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--notebook-line) 1px, transparent 1px);
  --notebook-size: 28px 28px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
}

body {
  margin: 0;
  background: var(--white);
  color: var(--text);
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
}

body.modal-open {
  overflow: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
select {
  font: inherit;
}

svg {
  width: 22px;
  height: 22px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.container {
  width: min(var(--container), calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 72px;
  padding: 0 max(16px, calc((100vw - var(--container)) / 2));
  border-bottom: 1px solid rgba(229, 231, 235, 0.84);
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 8px 24px rgba(31, 41, 55, 0.06);
  backdrop-filter: blur(12px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: #0b355f;
  font-weight: 800;
  white-space: nowrap;
}

.brand-mark {
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  border-radius: 8px;
  background: var(--blue);
  color: white;
  font-size: 14px;
  letter-spacing: 0;
}

.nav {
  display: none;
  align-items: center;
  gap: 22px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;
}

.nav a:hover,
.site-footer a:hover {
  color: var(--blue);
}

.nav .protocol-link {
  color: var(--blue);
  font-weight: 700;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  border: 1px solid var(--blue);
  border-radius: 8px;
  background: var(--blue);
  color: white;
  cursor: pointer;
  font-weight: 700;
  padding: 0 20px;
  transition: background 160ms ease, border-color 160ms ease, transform 160ms ease;
}

.button:hover {
  background: #0b5fa8;
  border-color: #0b5fa8;
  transform: translateY(-1px);
}

.button:disabled {
  cursor: not-allowed;
  opacity: 0.65;
  transform: none;
}

.button.secondary {
  background: white;
  color: var(--blue);
}

.button.secondary:hover {
  background: #eef6ff;
}

.button.accent {
  width: 100%;
  background: var(--green);
  border-color: var(--green);
}

.button.accent:hover {
  background: #256b2a;
}

.button-small {
  min-height: 40px;
  padding: 0 14px;
  font-size: 14px;
}

.section {
  padding: 72px 0;
}

.muted-section {
  background: var(--bg);
}

.hero {
  padding-top: 56px;
  border-bottom: 1px solid var(--line);
  background:
    var(--notebook-grid),
    linear-gradient(180deg, rgba(247, 249, 252, 0.86), rgba(255, 255, 255, 0.9) 78%),
    var(--white);
  background-size: var(--notebook-size), var(--notebook-size), auto;
}

.hero-grid {
  display: grid;
  gap: 36px;
  align-items: center;
}

.hero-copy {
  display: grid;
  gap: 20px;
}

.badge {
  display: inline-flex;
  width: fit-content;
  align-items: center;
  min-height: 32px;
  border: 1px solid #b9d8f3;
  border-radius: 999px;
  background: #eef6ff;
  color: #0b5fa8;
  font-size: 13px;
  font-weight: 700;
  padding: 0 12px;
}

h1,
h2,
h3,
p {
  margin: 0;
}

h1 {
  max-width: 780px;
  font-size: clamp(36px, 8vw, 58px);
  line-height: 1.05;
  letter-spacing: 0;
}

h2 {
  font-size: clamp(28px, 5vw, 40px);
  line-height: 1.15;
  letter-spacing: 0;
}

h3 {
  font-size: 19px;
  line-height: 1.25;
}

.lead {
  max-width: 680px;
  color: var(--muted);
  font-size: 18px;
}

.check-list,
.compare-card ul {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.check-list li,
.compare-card li {
  position: relative;
  padding-left: 30px;
}

.check-list li::before,
.compare-card.after li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  width: 18px;
  height: 18px;
  border-radius: 999px;
  background: var(--green);
}

.check-list li::after,
.compare-card.after li::after {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  width: 5px;
  height: 9px;
  border: solid white;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.compare-card.before li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 13px;
  width: 16px;
  height: 2px;
  background: #b91c1c;
}

.hero-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.trust-row {
  display: grid;
  gap: 8px;
  max-width: 620px;
  border-left: 4px solid var(--green);
  background: #f1f8f2;
  padding: 14px 16px;
}

.trust-row span {
  color: #315d36;
}

.interface-card {
  display: grid;
  gap: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: white;
  box-shadow: var(--shadow);
  padding: 18px;
}

.window-bar {
  display: flex;
  gap: 6px;
}

.window-bar span {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: var(--line-strong);
}

.upload-row,
.processing,
.doc-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.upload-row {
  justify-content: flex-start;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px;
}

.upload-row small,
.result-grid small {
  display: block;
  color: var(--muted);
}

.file-icon,
.icon {
  display: inline-grid;
  flex: 0 0 auto;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: 8px;
  background: #eef6ff;
  color: var(--blue);
}

.processing {
  color: var(--muted);
  font-weight: 600;
}

.processing strong {
  color: var(--blue);
}

.progress {
  height: 10px;
  overflow: hidden;
  border-radius: 999px;
  background: #e8eef6;
}

.progress span {
  display: block;
  width: 86%;
  height: 100%;
  border-radius: inherit;
  background: var(--green);
}

.result-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.result-grid div,
.feature-card,
.audience-card,
.pain-card,
.step-card,
.compare-card,
.document-preview,
details {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: white;
}

.result-grid div {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 10px 12px;
  align-items: center;
  min-height: 86px;
  padding: 12px;
}

.result-grid small {
  grid-column: 2;
}

.section-heading {
  display: grid;
  gap: 10px;
  max-width: 760px;
  margin-bottom: 28px;
}

.section-heading p,
.example-grid p,
.security-card p,
.feature-card p,
.audience-card p,
.step-card p,
.final-cta p {
  color: var(--muted);
}

.pain-grid,
.feature-grid,
.audience-grid,
.compare-grid {
  display: grid;
  gap: 14px;
}

.pain-card {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 12px;
  align-items: center;
  min-height: 86px;
  padding: 18px;
  color: #334155;
  font-weight: 700;
}

.pain-icon {
  background: white;
}

.mini-cta {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.9);
  padding: 18px 0;
}

.mini-cta-inner {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.steps {
  position: relative;
  display: grid;
  gap: 14px;
}

.step-card {
  position: relative;
  display: grid;
  gap: 12px;
  background: var(--bg);
  padding: 22px;
}

.step-number {
  color: var(--blue);
  font-size: 13px;
  font-weight: 800;
}

.feature-card,
.audience-card,
.compare-card {
  display: grid;
  gap: 12px;
  min-height: 170px;
  padding: 22px;
}

.feature-card {
  align-content: start;
}

.audience-card {
  border-top: 4px solid var(--blue);
}

.compare-card.before {
  border-color: #fecaca;
  background: #fff7f7;
}

.compare-card.after {
  border-color: #bbf7d0;
  background: #f5fff7;
}

.security-section {
  background: white;
}

.security-card {
  display: grid;
  gap: 18px;
  align-items: start;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fbfdff;
  padding: 26px;
}

.shield {
  width: 54px;
  height: 54px;
  background: #edf7ed;
  color: var(--green);
}

.example-grid {
  display: grid;
  gap: 24px;
  align-items: center;
}

.example-grid > div:first-child {
  display: grid;
  gap: 16px;
}

.document-preview {
  display: grid;
  gap: 14px;
  padding: 22px;
  box-shadow: var(--shadow);
}

.doc-header {
  border-bottom: 1px solid var(--line);
  padding-bottom: 12px;
  color: var(--muted);
}

.doc-header strong {
  border-radius: 999px;
  background: #edf7ed;
  color: var(--green);
  padding: 4px 10px;
  font-size: 13px;
}

.document-preview ol {
  display: grid;
  gap: 8px;
  margin: 0;
  padding-left: 22px;
}

.chat-preview {
  border-radius: var(--radius);
  background: var(--bg);
  color: #334155;
  padding: 14px;
}

.faq-wrap {
  max-width: 860px;
}

.faq-list {
  display: grid;
  gap: 10px;
}

details {
  padding: 0 18px;
}

summary {
  cursor: pointer;
  font-weight: 800;
  padding: 18px 0;
}

details p {
  border-top: 1px solid var(--line);
  color: var(--muted);
  padding: 0 0 18px;
}

.final-cta {
  background: var(--blue);
  color: white;
  padding: 72px 0;
}

.final-grid {
  display: grid;
  gap: 26px;
  align-items: start;
}

.final-cta h2 {
  max-width: 620px;
}

.final-cta p {
  margin-top: 12px;
  color: #dbeafe;
}

.lead-form {
  display: grid;
  gap: 14px;
  border-radius: var(--radius);
  background: white;
  color: var(--text);
  padding: 18px;
}

.lead-form label {
  display: grid;
  gap: 7px;
  color: #334155;
  font-size: 14px;
  font-weight: 700;
}

.lead-form input,
.lead-form select,
.lead-form textarea {
  width: 100%;
  min-height: 46px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: white;
  color: var(--text);
  padding: 0 12px;
}

.lead-form textarea {
  min-height: 92px;
  resize: vertical;
  padding-top: 11px;
  padding-bottom: 11px;
}

.form-note {
  min-height: 42px;
  color: var(--muted) !important;
  font-size: 14px;
}

.form-note:empty {
  display: none;
}

.lead-invite {
  display: grid;
  gap: 14px;
  border-radius: var(--radius);
  background: white;
  color: var(--text);
  padding: 22px;
}

.lead-invite p {
  color: var(--muted);
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 18px;
}

.modal.is-open {
  display: flex;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.48);
}

.modal-dialog {
  position: relative;
  display: grid;
  gap: 12px;
  width: min(520px, 100%);
  max-height: min(720px, calc(100vh - 36px));
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: white;
  box-shadow: 0 24px 80px rgba(15, 23, 42, 0.24);
  padding: 24px;
}

.modal-dialog > p {
  color: var(--muted);
}

.modal-close {
  position: absolute;
  top: 10px;
  right: 10px;
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: white;
  color: var(--muted);
  cursor: pointer;
  font-size: 24px;
  line-height: 1;
}

.modal-close:hover {
  color: var(--text);
  border-color: var(--line-strong);
}

.modal-dialog .lead-form {
  padding: 0;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: white;
  padding: 32px 0;
}

.footer-grid,
.site-footer nav,
.legal-links {
  display: grid;
  gap: 12px;
}

.site-footer nav,
.legal-links,
.copyright {
  color: var(--muted);
  font-size: 14px;
}

@media (min-width: 640px) {
  .hero-actions,
  .mini-cta-inner {
    flex-direction: row;
    align-items: center;
  }

  .mini-cta-inner {
    justify-content: space-between;
  }

  .result-grid,
  .feature-grid,
  .audience-grid,
  .compare-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .pain-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .security-card {
    grid-template-columns: 54px 1fr;
  }
}

@media (min-width: 900px) {
  .nav {
    display: flex;
  }

  .hero-grid,
  .example-grid,
  .final-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(360px, 0.95fr);
  }

  .hero {
    padding-top: 76px;
  }

  .steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .steps::before {
    content: "";
    position: absolute;
    top: 73px;
    left: 12.5%;
    right: 12.5%;
    height: 2px;
    background: var(--line-strong);
  }

  .step-card {
    z-index: 1;
  }

  .audience-grid,
  .pain-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .footer-grid {
    grid-template-columns: 1.1fr 1fr 1.1fr auto;
    align-items: start;
  }
}

@media (max-width: 520px) {
  .site-header {
    min-height: 64px;
  }

  .site-header .button {
    display: none;
  }

  .section {
    padding: 54px 0;
  }

  .hero {
    padding-top: 40px;
  }

  .brand {
    font-size: 15px;
  }

  .brand-mark {
    width: 32px;
    height: 32px;
  }
}