:root {
  --bg: #f6f7fb;
  --surface: #ffffff;
  --surface-soft: #f9fafb;
  --line: #e5e7eb;
  --line-strong: #d1d5db;
  --text: #111827;
  --muted: #5f6673;
  --soft: #eef2ff;
  --accent: #4f46e5;
  --activity-color: #4f46e5;
  --activity-soft: #eef2ff;
  --activity-line: #c7d2fe;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 22px;
}

body {
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  background:
    radial-gradient(circle at top left, rgba(79, 70, 229, 0.08), transparent 32%),
    linear-gradient(180deg, #ffffff 0%, var(--bg) 360px);
  color: var(--text);
  font-family: "Space Grotesk", Inter, system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}

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

img {
  display: block;
  max-width: 100%;
}

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

.page {
  width: min(1280px, calc(100% - 40px));
  margin: 0 auto;
  padding: 26px 0 72px;
}

.bg-glow {
  display: none;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 42px;
}

.brand,
.nav-actions,
.hero-actions,
.chips,
.tags,
.link-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.brand {
  align-items: center;
  gap: 12px;
  font-weight: 800;
  text-transform: uppercase;
}

.brand span {
  color: var(--accent);
  font-size: 28px;
  line-height: 1;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: var(--surface);
  padding: 11px 15px;
  color: var(--text);
  font-size: 13px;
  font-weight: 700;
  transition: 0.18s ease;
}

.btn:hover,
.btn.primary {
  border-color: var(--accent);
  background: var(--accent);
  color: white;
}

.kicker {
  display: inline-flex;
  width: fit-content;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface-soft);
  padding: 7px 11px;
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 10px;
  font-weight: 800;
  text-transform: uppercase;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 22px;
  align-items: stretch;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--surface);
  padding: 30px;
  box-shadow: 0 18px 48px rgba(17, 24, 39, 0.08);
}

h1 {
  max-width: 920px;
  margin-top: 18px;
  font-size: clamp(42px, 6vw, 72px);
  line-height: 0.98;
  letter-spacing: 0;
  text-transform: uppercase;
}

h2 {
  margin-top: 10px;
  font-size: clamp(26px, 3vw, 38px);
  line-height: 1.05;
  letter-spacing: 0;
  text-transform: uppercase;
}

h3 {
  font-size: 19px;
  line-height: 1.22;
}

.lead,
.wide-copy,
.panel p,
.focus-card p,
.doc-card p,
.activity-card p,
.schema-card p,
.pending-diagram p {
  color: var(--muted);
  line-height: 1.7;
}

.lead {
  max-width: 820px;
  margin-top: 18px;
  font-size: 17px;
}

.hero-actions {
  margin-top: 28px;
}

.hero-card,
.panel,
.doc-card,
.activity-card,
.schema-card,
.metric-card,
.pending-diagram,
.diagram-panel {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  box-shadow: 0 10px 28px rgba(17, 24, 39, 0.06);
}

.hero-card {
  padding: 24px;
}

.hero-card img {
  width: 110px;
  height: 110px;
  object-fit: contain;
  margin-bottom: 28px;
}

.meta-row {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  border-top: 1px solid var(--line);
  padding: 14px 0;
}

.meta-row span,
.section-head span,
small {
  color: #6b7280;
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 10px;
  font-weight: 800;
  text-transform: uppercase;
}

.section {
  margin-top: 26px;
}

.section-card {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.94);
  padding: 24px;
  box-shadow: 0 14px 40px rgba(17, 24, 39, 0.045);
}

.flow-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-top: 18px;
}

.flow-card {
  display: grid;
  min-height: 108px;
  align-content: start;
  gap: 10px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  padding: 16px;
  transition: 0.18s ease;
}

.flow-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.flow-card:first-child {
  border-color: #c7d2fe;
  background: linear-gradient(135deg, #eef2ff, #ffffff 62%);
}

.flow-card span,
.section-label span {
  display: inline-grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border-radius: 10px;
  background: var(--accent);
  color: white;
  font-size: 13px;
  font-weight: 900;
}

.flow-card strong {
  font-size: 16px;
}

.flow-card small {
  color: var(--muted);
  line-height: 1.45;
  text-transform: none;
}

.section-label {
  display: flex;
  align-items: center;
  gap: 12px;
}

.split,
.stage-description-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(320px, 0.92fr);
  gap: 18px;
}

.panel {
  padding: 24px;
}

.context-section .panel {
  box-shadow: none;
}

.mission-panel {
  border-color: #c7d2fe;
  background: linear-gradient(135deg, #f8faff, #ffffff);
}

.panel p {
  margin-top: 14px;
}

.chips {
  margin-top: 18px;
}

.mission-box {
  margin-top: 18px;
  border: 1px solid #dbe3ff;
  border-radius: 10px;
  background: #f7f9ff;
  padding: 16px;
}

.mission-box ul {
  margin: 12px 0 0;
  padding-left: 20px;
  color: var(--muted);
  line-height: 1.7;
}

.mission-box li + li {
  margin-top: 6px;
}

.chips span,
.tags span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  border: 1px solid #c7d2fe;
  border-radius: 999px;
  background: var(--soft);
  padding: 7px 10px;
  color: #3730a3;
  font-size: 11px;
  font-weight: 800;
}

.tags span strong {
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 11px;
}

.tags span em {
  font-style: normal;
  text-transform: none;
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 18px;
}

.metrics-grid,
.doc-grid,
.activity-grid,
.schema-grid,
.media-grid {
  display: grid;
  gap: 16px;
}

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

.metric-card {
  padding: 20px;
}

.context-metrics {
  margin-top: 16px;
}

.context-metrics .metric-card {
  background: var(--surface-soft);
  box-shadow: none;
}

.metric-card strong {
  display: block;
  margin-top: 10px;
  font-size: 20px;
}

.major-panel {
  padding-top: 24px;
}

.major-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(280px, 0.5fr);
  gap: 18px;
  margin-top: 22px;
}

.focus-panel {
  background:
    linear-gradient(135deg, #ffffff, color-mix(in srgb, var(--soft) 34%, #ffffff)),
    var(--surface);
}

.focus-panel .section-head {
  align-items: flex-start;
  flex-direction: column;
}

.focus-hero {
  border: 1px solid #dbe3ff;
  border-left: 5px solid var(--accent);
  border-radius: 12px;
  background: #ffffff;
  padding: 22px;
  box-shadow: 0 12px 32px rgba(17, 24, 39, 0.05);
}

.focus-hero h3 {
  margin-top: 10px;
  font-size: clamp(28px, 3vw, 42px);
  line-height: 1.05;
  text-transform: uppercase;
}

.focus-hero p {
  max-width: 980px;
  margin-top: 12px;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.7;
}

.focus-project-block {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(340px, 0.9fr);
  align-items: start;
  gap: 16px;
  margin-top: 16px;
}

.focus-project-block .diagram-panel,
.focus-project-block .compact-panel {
  background: rgba(255, 255, 255, 0.92);
}

.focus-diagram-panel {
  min-height: 0;
}

.focus-evidence-panel h2 {
  font-size: clamp(24px, 2.2vw, 34px);
}

.panel-note {
  margin-top: 8px;
  color: var(--muted);
  line-height: 1.6;
}

.focus-evidence {
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
}

.before-after-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 16px;
}

.before-after-card {
  border: 1px solid #dbe3ff;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.9);
  padding: 18px;
  box-shadow: 0 10px 24px rgba(17, 24, 39, 0.04);
}

.before-after-card ul {
  margin: 12px 0 0;
  padding-left: 18px;
  color: var(--muted);
  line-height: 1.6;
}

.before-after-card li + li {
  margin-top: 7px;
}

.focus-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 16px;
}

.focus-card {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.88);
  padding: 18px;
  box-shadow: 0 10px 24px rgba(17, 24, 39, 0.04);
}

.focus-context,
.focus-difficulties {
  grid-column: span 2;
}

.focus-card p,
.focus-card ul {
  margin-top: 12px;
}

.focus-card ul {
  padding-left: 19px;
  color: var(--muted);
  line-height: 1.65;
}

.focus-card li + li {
  margin-top: 7px;
}

.focus-difficulties ul {
  padding-left: 0;
  list-style: none;
}

.focus-difficulties li {
  border-top: 1px solid var(--line);
  padding-top: 12px;
}

.focus-difficulties li:first-child {
  border-top: 0;
  padding-top: 0;
}

.focus-difficulties strong,
.focus-difficulties span {
  display: block;
}

.focus-difficulties strong {
  color: var(--text);
  line-height: 1.35;
}

.focus-difficulties span {
  margin-top: 5px;
  color: var(--muted);
  line-height: 1.6;
}

.tool-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.tool-cloud span {
  border: 1px solid #dbe3ff;
  border-radius: 999px;
  background: #f7f9ff;
  padding: 7px 10px;
  color: #3730a3;
  font-size: 12px;
  font-weight: 800;
}

.diagram-panel {
  min-height: 390px;
  padding: 22px;
}

.network-figure {
  display: block;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #ffffff;
}

.network-figure img {
  width: 100%;
  max-height: 420px;
  object-fit: contain;
  background: #ffffff;
}

.network-figure span {
  display: block;
  border-top: 1px solid var(--line);
  padding: 12px 14px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 800;
}

.diagram-head {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 20px;
}

.diagram-head strong {
  max-width: 620px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.55;
  text-align: right;
}

.soc-diagram {
  position: relative;
  margin-top: 18px;
  min-height: 360px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #ffffff;
  overflow: hidden;
}

.soc-node,
.soc-zone {
  position: absolute;
  z-index: 2;
  border: 1px solid var(--line-strong);
  background: #f9fafb;
  border-radius: 10px;
  padding: 13px;
  text-align: center;
  font-weight: 800;
}

.soc-node span,
.soc-zone small {
  display: block;
  margin-top: 5px;
  color: var(--muted);
  font-size: 11px;
}

.soc-zone div {
  margin-top: 9px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 9px;
  background: #ffffff;
  color: #374151;
  font-size: 13px;
}

.internet {
  left: 50%;
  top: 18px;
  transform: translateX(-50%);
  width: 210px;
}

.firewall {
  left: 50%;
  top: 125px;
  transform: translateX(-50%);
  width: 220px;
}

.vlan-lan {
  left: 28px;
  bottom: 24px;
  width: 250px;
}

.vlan-soc {
  right: 28px;
  bottom: 24px;
  width: 280px;
}

.ids {
  left: 50%;
  bottom: 38px;
  transform: translateX(-50%);
  width: 220px;
}

.soc-flow {
  position: absolute;
  z-index: 1;
  height: 2px;
  background: #9ca3af;
  transform-origin: left center;
}

.flow-one {
  left: 50%;
  top: 86px;
  width: 106px;
  transform: rotate(90deg);
}

.flow-two {
  left: 42%;
  top: 204px;
  width: 222px;
  transform: rotate(150deg);
}

.flow-three {
  left: 55%;
  top: 204px;
  width: 214px;
  transform: rotate(28deg);
}

.flow-four {
  left: 50%;
  top: 228px;
  width: 106px;
  transform: rotate(90deg);
}

.pending-diagram {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 16px;
  align-items: center;
  padding: 24px;
}

.diagram-icon {
  display: grid;
  width: 64px;
  height: 64px;
  place-items: center;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  background: var(--surface-soft);
  color: var(--accent);
  font-weight: 900;
}

.compact-panel {
  align-self: stretch;
}

.link-list {
  flex-direction: column;
  margin-top: 20px;
}

.link-pill {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-soft);
  padding: 13px;
  color: var(--text);
  font-weight: 800;
  transition: 0.18s ease;
}

.link-pill:hover {
  border-color: var(--accent);
  background: var(--soft);
}

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

.activity-card {
  min-height: 215px;
  border-color: var(--activity-line);
  background:
    linear-gradient(135deg, var(--activity-soft), #ffffff 62%),
    var(--surface);
  padding: 24px;
  transition: 0.18s ease;
}

.activity-card:hover,
.doc-card:hover,
.schema-card:hover,
.media-card:hover {
  border-color: var(--line-strong);
  transform: translateY(-3px);
}

.activity-card:hover,
.doc-card:hover {
  border-color: var(--activity-color);
}

.activity-index {
  position: absolute;
  right: 16px;
  top: 12px;
  color: color-mix(in srgb, var(--activity-color) 16%, transparent);
  font-size: 48px;
  font-weight: 900;
  line-height: 1;
}

.activity-card::before,
.doc-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 4px;
  background: var(--activity-color);
  opacity: 0.85;
}

.activity-card h3,
.doc-card h3 {
  margin-top: 14px;
}

.activity-card p {
  margin-top: 12px;
}

.activity-card .tags {
  margin-top: 18px;
}

.activity-card .tags span {
  border-color: var(--activity-line);
  background: color-mix(in srgb, var(--activity-soft) 82%, #ffffff);
  color: color-mix(in srgb, var(--activity-color) 78%, #111827);
}

.checked-competencies {
  margin-top: 18px;
  border: 1px solid var(--activity-line);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.72);
  padding: 14px;
}

.checked-competencies ul {
  display: grid;
  gap: 8px;
  margin: 10px 0 0;
  padding: 0;
  list-style: none;
}

.checked-competencies li {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 10px;
  align-items: start;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.45;
}

.checked-competencies li span {
  display: inline-grid;
  min-height: 24px;
  place-items: center;
  border-radius: 7px;
  background: var(--activity-color);
  color: #ffffff;
  font-size: 11px;
  font-weight: 900;
}

.checked-competencies li strong {
  color: #374151;
  font-weight: 700;
}

.activity-proof {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  width: fit-content;
  margin-top: 20px;
  border: 1px solid var(--activity-line);
  border-radius: 8px;
  background: var(--activity-color);
  padding: 11px 13px;
  color: white;
  font-size: 13px;
  font-weight: 800;
  transition: 0.18s ease;
}

.activity-proof small {
  color: rgba(255, 255, 255, 0.78);
}

.activity-proof:hover {
  filter: brightness(0.94);
  transform: translateY(-1px);
}

.evidence-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 10px;
  margin-top: 20px;
}

.major-evidence {
  grid-template-columns: 1fr;
}

.evidence-card {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--activity-line);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.76);
  color: var(--text);
  transition: 0.18s ease;
}

.evidence-card:hover {
  border-color: var(--activity-color);
  transform: translateY(-2px);
}

.evidence-preview,
.evidence-icon {
  display: block;
  width: 100%;
  height: 118px;
  border-bottom: 1px solid var(--activity-line);
  background: #ffffff;
  object-fit: contain;
}

.evidence-card video.evidence-preview,
.evidence-card iframe.evidence-preview {
  background: #050505;
}

.evidence-card iframe.evidence-preview {
  border: 0;
}

.evidence-icon {
  display: grid;
  place-items: center;
  color: var(--activity-color);
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.evidence-body {
  padding: 12px;
}

.evidence-body strong {
  display: block;
  margin-top: 5px;
  font-size: 13px;
}

.evidence-body p {
  margin-top: 8px;
  font-size: 12px;
  line-height: 1.5;
}

.evidence-body span,
.evidence-body a {
  display: inline-flex;
  margin-top: 10px;
  color: var(--activity-color);
  font-size: 12px;
  font-weight: 800;
}

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

.doc-card {
  padding: 22px;
  border-color: var(--activity-line);
  background: linear-gradient(135deg, var(--activity-soft), #ffffff 64%);
  transition: 0.18s ease;
}

.doc-preview {
  width: 100%;
  height: 210px;
  margin-bottom: 18px;
  border: 1px solid color-mix(in srgb, var(--activity-line) 76%, #ffffff);
  border-radius: 10px;
  background: #ffffff;
  object-fit: contain;
}

iframe.doc-preview {
  display: block;
  border: 0;
  background: #050505;
}

.featured-doc {
  grid-column: 1 / -1;
  display: grid;
  min-height: 178px;
  align-content: center;
  border-color: var(--activity-line);
  background: linear-gradient(135deg, var(--activity-soft), #ffffff 60%);
}

.featured-doc .doc-preview {
  height: 260px;
}

.featured-doc h3 {
  max-width: 720px;
  font-size: clamp(24px, 3vw, 34px);
}

.doc-card p {
  min-height: 0;
  margin-top: 12px;
}

.doc-card strong {
  display: inline-flex;
  margin-top: 18px;
  color: var(--activity-color);
}

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

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

.final-documents {
  margin-top: 34px;
  padding-bottom: 32px;
}

.schema-card,
.media-card {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
  box-shadow: 0 16px 50px rgba(17, 24, 39, 0.08);
  transition: 0.18s ease;
}

.schema-card img,
.media-card img,
.media-card video,
.media-card iframe {
  width: 100%;
  height: 260px;
  object-fit: contain;
  background: #ffffff;
  border-bottom: 1px solid var(--line);
}

.media-card iframe {
  display: block;
  border: 0;
  background: #050505;
}

.schema-card div,
.media-card div {
  padding: 18px;
}

.schema-card p,
.media-card p {
  margin-top: 8px;
  font-size: 13px;
}

@media (max-width: 1080px) {
  .hero,
  .split,
  .stage-description-grid,
  .major-grid,
  .focus-project-block,
  .before-after-grid,
  .focus-grid,
  .flow-strip {
    grid-template-columns: 1fr;
  }

  .focus-context,
  .focus-difficulties {
    grid-column: auto;
  }

  .metrics-grid,
  .activity-grid,
  .doc-grid,
  .schema-grid,
  .media-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .featured-doc {
    grid-column: 1 / -1;
  }
}

@media (max-width: 720px) {
  .page {
    width: min(100% - 24px, 1180px);
    padding-top: 18px;
  }

  .hero,
  .section-card {
    padding: 18px;
  }

  .nav,
  .section-head,
  .diagram-head {
    align-items: flex-start;
    flex-direction: column;
  }

  h1 {
    font-size: 38px;
  }

  .metrics-grid,
  .activity-grid,
  .doc-grid,
  .schema-grid,
  .media-grid,
  .focus-project-block,
  .before-after-grid,
  .flow-strip {
    grid-template-columns: 1fr;
  }

  .featured-doc {
    grid-column: auto;
  }

  .diagram-head strong {
    text-align: left;
  }

  .soc-diagram {
    min-height: 660px;
  }

  .internet,
  .firewall,
  .ids,
  .vlan-lan,
  .vlan-soc {
    left: 50%;
    right: auto;
    width: min(280px, calc(100% - 32px));
    transform: translateX(-50%);
  }

  .internet { top: 18px; }
  .firewall { top: 126px; }
  .vlan-lan { top: 248px; bottom: auto; }
  .ids { top: 408px; bottom: auto; }
  .vlan-soc { top: 504px; bottom: auto; }

  .soc-flow {
    display: none;
  }
}