:root {
  --ink: #172033;
  --muted: #5f6b7d;
  --line: #dfe6ef;
  --bg: #f6f8fb;
  --panel: #ffffff;
  --primary: #245edb;
  --primary-dark: #173f98;
  --green: #168a6a;
  --orange: #d88420;
  --red: #c23b3b;
  --dark: #132033;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Inter", "Segoe UI", "Roboto", "Arial", sans-serif;
  color: var(--ink);
  background: #fff;
  line-height: 1.6;
}

.navbar {
  min-height: 74px;
}

.navbar-brand {
  font-weight: 850;
  letter-spacing: 0;
  color: var(--ink);
}

.nav-link {
  color: var(--muted);
  font-weight: 650;
  font-size: 0.92rem;
}

.nav-link.active,
.nav-link:hover {
  color: var(--primary);
}

.btn {
  border-radius: 8px;
  font-weight: 750;
  letter-spacing: 0;
}

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

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

.hero {
  padding: 146px 0 76px;
  background: linear-gradient(125deg, rgba(36, 94, 219, 0.08), rgba(22, 138, 106, 0.08)), #fbfcff;
  border-bottom: 1px solid var(--line);
}

.label {
  display: inline-flex;
  gap: 9px;
  align-items: center;
  margin-bottom: 14px;
  color: var(--primary-dark);
  font-weight: 850;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.label::before {
  content: "";
  width: 24px;
  height: 3px;
  background: var(--green);
  border-radius: 99px;
}

h1,
h2,
h3 {
  letter-spacing: 0;
}

h1 {
  font-size: clamp(2.3rem, 5vw, 4.5rem);
  line-height: 1.04;
  font-weight: 880;
  max-width: 980px;
  margin: 0 0 22px;
}

h2 {
  font-size: clamp(1.9rem, 3.5vw, 3rem);
  line-height: 1.12;
  font-weight: 840;
  margin: 0 0 18px;
}

h3 {
  font-size: 1.08rem;
  font-weight: 800;
}

.lead {
  color: var(--muted);
  font-size: 1.14rem;
  max-width: 900px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.summary-card,
.info-card,
.persona,
.feature,
.integration {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 12px 26px rgba(19, 32, 51, 0.05);
}

.summary-card {
  display: grid;
  gap: 0;
  overflow: hidden;
}

.summary-card div {
  padding: 22px;
  border-bottom: 1px solid var(--line);
}

.summary-card div:last-child {
  border-bottom: 0;
}

.summary-card strong,
.summary-card span {
  display: block;
}

.summary-card span,
p,
.persona p,
.feature p,
.feature small,
.domain-grid span,
.object-grid span,
.ui-grid span,
.security-grid span,
.strengths span,
.risk-grid span,
.recommendations span,
.value-grid span {
  color: var(--muted);
}

.hero-points {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 46px;
}

.hero-points span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-weight: 700;
}

.hero-points i {
  color: var(--green);
}

.section {
  padding: 86px 0;
}

.section-muted {
  background: var(--bg);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.section-title {
  max-width: 940px;
  margin-bottom: 34px;
}

.info-card,
.persona,
.integration {
  height: 100%;
  padding: 24px;
}

.persona i {
  display: inline-flex;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  color: var(--primary);
  background: #eaf1ff;
  border-radius: 8px;
  font-size: 1.25rem;
}

.wide-note,
.muted-note {
  padding: 22px;
  background: #eef5ff;
  border: 1px solid #cfe0ff;
  border-radius: 8px;
  color: #254161;
}

.fact-list {
  display: grid;
  gap: 12px;
}

.fact-list div {
  padding: 18px 20px;
  background: #fff;
  border: 1px solid var(--line);
  border-left: 4px solid var(--primary);
  border-radius: 8px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.feature {
  padding: 24px;
}

.feature i {
  color: var(--primary);
  font-size: 1.5rem;
  margin-bottom: 16px;
}

.feature small {
  display: block;
  border-top: 1px solid var(--line);
  margin-top: 14px;
  padding-top: 12px;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background: #fff;
}

.timeline div {
  position: relative;
  min-height: 280px;
  padding: 24px;
  border-right: 1px solid var(--line);
}

.timeline div:last-child {
  border-right: 0;
}

.timeline span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  margin-bottom: 32px;
  color: #fff;
  background: var(--primary);
  border-radius: 8px;
  font-weight: 850;
}

.domain-grid,
.object-grid,
.ui-grid,
.security-grid,
.strengths,
.risk-grid,
.recommendations,
.value-grid,
.appendix-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.domain-grid div,
.object-grid div,
.ui-grid div,
.security-grid div,
.strengths div,
.risk-grid div,
.recommendations div,
.value-grid div,
.appendix-grid div {
  display: grid;
  gap: 8px;
  padding: 22px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 10px 24px rgba(19, 32, 51, 0.04);
}

.ui-grid i {
  color: var(--green);
  font-size: 1.35rem;
}

.risk-grid div {
  border-top: 4px solid var(--red);
}

.recommendations div {
  border-top: 4px solid var(--green);
}

.strengths div {
  border-top: 4px solid var(--primary);
}

.tech-table-wrapper {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.tech-table {
  margin-bottom: 0;
  min-width: 840px;
}

.tech-table th {
  background: var(--dark);
  color: #fff;
  border-color: #273850;
}

.tech-table td,
.tech-table th {
  padding: 18px;
  vertical-align: top;
}

.architecture-img {
  width: 100%;
  height: auto;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.conclusions {
  display: grid;
  gap: 12px;
  padding-left: 22px;
}

.conclusions li {
  padding: 8px 0;
  color: var(--ink);
}

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

.footer {
  padding: 28px 0;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

.scroll-top {
  position: fixed;
  right: 22px;
  bottom: 22px;
  width: 44px;
  height: 44px;
  display: none;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: 8px;
  color: #fff;
  background: var(--dark);
  box-shadow: 0 10px 24px rgba(19, 32, 51, 0.24);
}

.scroll-top.is-visible {
  display: inline-flex;
}

@media (max-width: 1199.98px) {
  .feature-grid,
  .domain-grid,
  .object-grid,
  .ui-grid,
  .security-grid,
  .strengths,
  .risk-grid,
  .recommendations,
  .value-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .timeline div {
    border-bottom: 1px solid var(--line);
  }
}

@media (max-width: 767.98px) {
  .hero {
    padding-top: 118px;
  }

  .section {
    padding: 64px 0;
  }

  .feature-grid,
  .domain-grid,
  .object-grid,
  .ui-grid,
  .security-grid,
  .strengths,
  .risk-grid,
  .recommendations,
  .value-grid,
  .appendix-grid,
  .timeline {
    grid-template-columns: 1fr;
  }

  .timeline div {
    min-height: auto;
    border-right: 0;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
}