:root {
  --bg: #f6f8fb;
  --panel: #ffffff;
  --ink: #172033;
  --muted: #5f6f89;
  --line: #d9e2ef;
  --accent: #2457a6;
  --accent-2: #eaf1ff;
  --good: #e8f7ee;
  --warn: #fff4dd;
  --danger: #fdecec;
  --purple: #f0eafe;
  --shadow: 0 12px 30px rgba(20, 35, 60, 0.08);
}

* {
  box-sizing: border-box;
}

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

header {
  background: linear-gradient(135deg, #17396f, #2d69c4);
  color: #ffffff;
  padding: 64px 24px 56px;
  text-align: left;
}

.case-top-image,
.panel-image {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 16px;
}

.image-panel {
  padding: 18px;
}

.wrap {
  max-width: 1180px;
  margin: 0 auto;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.78rem;
  font-weight: 700;
  opacity: 0.85;
  margin-bottom: 10px;
}

h1 {
  font-size: clamp(2rem, 4vw, 4rem);
  line-height: 1.05;
  margin: 0 0 18px;
}

.subtitle,
header p {
  font-size: 1.16rem;
  max-width: 850px;
  color: rgba(255, 255, 255, 0.9);
  margin: 0;
}

main {
  padding: 34px 24px 72px;
}

section {
  margin: 0 auto 34px;
}

nav {
  background: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(10px);
}

nav .wrap {
  display: flex;
  gap: 18px;
  overflow-x: auto;
  padding: 12px 24px;
}

nav a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 700;
  white-space: nowrap;
  font-size: 0.95rem;
}

h2 {
  margin-top: 0;
  font-size: 1.75rem;
  line-height: 1.2;
}

h3 {
  margin-top: 0;
  margin-bottom: 8px;
  color: #183966;
}

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 22px;
  box-shadow: var(--shadow);
  padding: 28px;
}

.card-link {
  display: block;
  text-decoration: none;
  color: inherit;
}

.card-link .card {
  height: 100%;
  transition: transform 0.2s;
}

.card-link:hover .card {
  transform: translateY(-4px);
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

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

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.mini,
.grid > div:not(.card):not(.mini) {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fbfdff;
}

.mini p,
.grid > div:not(.card):not(.mini) p {
  margin-bottom: 0;
  color: var(--muted);
}

.thumbnail-button {
  display: block;
  width: 100%;
  margin-top: 16px;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #ffffff;
  cursor: pointer;
  box-shadow: 0 8px 20px rgba(20, 35, 60, 0.08);
  transition: transform 0.2s, border-color 0.2s;
}

.thumbnail-button:hover,
.thumbnail-button:focus-visible {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.thumbnail-button:focus-visible {
  outline: 3px solid rgba(36, 87, 166, 0.22);
  outline-offset: 3px;
}

.thumbnail-button img {
  display: block;
  width: 100%;
  max-height: 150px;
  object-fit: contain;
  border-radius: 10px;
}

.tag {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  background: var(--accent-2);
  color: var(--accent);
  padding: 4px 10px;
  font-weight: 700;
  font-size: 0.8rem;
  margin-bottom: 8px;
}

.lead {
  font-size: 1.08rem;
  color: #34445f;
}

.figure {
  margin-top: 20px;
  padding: 22px;
  border-radius: 20px;
  background: #f9fbff;
  border: 1px solid var(--line);
}

.triad,
.flow,
.layers,
.roles,
.models {
  display: grid;
  gap: 12px;
  align-items: stretch;
}

.triad {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  text-align: center;
}

.flow {
  grid-template-columns: repeat(6, minmax(0, 1fr));
}

.layers {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

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

.triad div,
.flow div,
.layers div,
.roles div,
.models div,
.role-card {
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 14px;
  min-height: 92px;
}

.triad strong,
.flow span,
.layers span,
.role-card span {
  display: block;
  color: var(--accent);
  font-weight: 800;
  margin-bottom: 4px;
}

.case {
  border-left: 5px solid var(--accent);
  background: #fbfdff;
  padding: 18px 20px;
  border-radius: 14px;
  margin-bottom: 12px;
}

.case ul {
  margin-bottom: 0;
}

.callout,
.challenge,
.swot,
.deliverable {
  border-radius: 18px;
  padding: 20px;
}

.callout {
  border-left: 5px solid var(--accent);
  background: #fbfdff;
}

.challenge,
.swot {
  border: 1px solid var(--line);
}

.deliverable {
  background: #fff4dd;
  border: 1px solid #eed39b;
}

.governance,
.classification,
.threats,
.architecture,
.networking {
  background: var(--accent-2);
}

.risk,
.lifecycle,
.opportunities,
.resilience,
.transport {
  background: var(--warn);
}

.compliance,
.storage,
.weaknesses,
.crypto,
.assessment,
.incident,
.supply {
  background: var(--danger);
}

.roles,
.ownership,
.strengths,
.trust,
.lifecycle,
.audit,
.resilience,
.pipeline {
  background: var(--good);
}

.auth,
.classification,
.threats,
.architecture,
.networking,
.assessment,
.soc,
.sdlc {
  background: var(--accent-2);
}

.access,
.risk,
.lifecycle,
.opportunities,
.resilience,
.transport,
.testing,
.forensics,
.code {
  background: var(--warn);
}

.privileged,
.compliance,
.storage,
.weaknesses,
.crypto,
.incident,
.coverage,
.supply {
  background: var(--danger);
}

.federation,
.monitoring,
.threat,
.api {
  background: var(--purple);
}

.phase {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 16px;
  align-items: start;
  margin-bottom: 14px;
}

.phase-num {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--accent);
  color: #ffffff;
  font-weight: 900;
  font-size: 1.2rem;
}

.swot-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.domain-list {
  columns: 2;
  column-gap: 40px;
}

li {
  margin-bottom: 8px;
}

table {
  width: 100%;
  border-collapse: collapse;
  overflow: hidden;
  border-radius: 16px;
  font-size: 0.95rem;
}

th,
td {
  border-bottom: 1px solid var(--line);
  padding: 13px 14px;
  vertical-align: top;
  text-align: left;
}

th {
  background: #eaf1ff;
  color: #17396f;
  position: sticky;
  top: 47px;
  z-index: 10;
}

tr:nth-child(even) td {
  background: #fbfdff;
}

td:first-child {
  width: 52px;
  font-weight: 700;
  color: var(--muted);
}

td:nth-child(2) {
  width: 240px;
  font-weight: 800;
  color: #17396f;
}

.source-note {
  color: var(--muted);
  font-size: 0.9rem;
  margin-top: 14px;
}

.image-dialog {
  width: min(1100px, calc(100vw - 36px));
  max-height: calc(100vh - 36px);
  padding: 48px 18px 18px;
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: 0 28px 80px rgba(10, 18, 32, 0.35);
}

.image-dialog::backdrop {
  background: rgba(11, 18, 31, 0.72);
}

.image-dialog img {
  display: block;
  width: 100%;
  max-height: calc(100vh - 120px);
  object-fit: contain;
  border-radius: 12px;
}

.dialog-close {
  position: absolute;
  top: 12px;
  right: 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #ffffff;
  color: var(--accent);
  cursor: pointer;
  font-weight: 800;
  padding: 7px 14px;
}

.dialog-close:hover,
.dialog-close:focus-visible {
  border-color: var(--accent);
}

footer {
  padding: 28px 24px;
  text-align: center;
  background: #172033;
  color: rgba(255, 255, 255, 0.78);
  margin-top: 40px;
}

.homepage header {
  padding: 80px 24px;
  text-align: center;
}

.homepage .wrap {
  max-width: 1200px;
}

.homepage .subtitle {
  max-width: 700px;
  margin: 0 auto;
}

@media (max-width: 900px) {
  .grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 850px) {
  header {
    padding-top: 42px;
  }

  .card {
    padding: 20px;
  }

  .grid,
  .two-col,
  .triad,
  .flow,
  .layers,
  .roles,
  .models,
  .swot-grid {
    grid-template-columns: 1fr;
  }

  .phase {
    grid-template-columns: 1fr;
  }

  .domain-list {
    columns: 1;
  }

  th {
    position: static;
  }

  table,
  thead,
  tbody,
  th,
  td,
  tr {
    display: block;
  }

  thead {
    display: none;
  }

  tr {
    border: 1px solid var(--line);
    border-radius: 14px;
    margin-bottom: 12px;
    overflow: hidden;
    background: #ffffff;
  }

  td {
    border-bottom: none;
    width: auto !important;
  }

  td::before {
    display: block;
    font-weight: 800;
    color: var(--muted);
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
  }

  td:nth-child(1)::before {
    content: "Number";
  }

  td:nth-child(2)::before {
    content: "Term";
  }

  td:nth-child(3)::before {
    content: "Definition";
  }
}

@media (max-width: 600px) {
  .grid {
    grid-template-columns: 1fr;
  }
}