:root {
  --dbms-ink: #14233b;
  --dbms-muted: #5d6b7e;
  --dbms-navy: #102a43;
  --dbms-blue: #155e75;
  --dbms-cyan: #0891b2;
  --dbms-cyan-soft: #ecfeff;
  --dbms-border: #d8e1ea;
  --dbms-panel: #ffffff;
  --dbms-bg: #f4f7fa;
  --dbms-focus: #f59e0b;
  --release-green: #166534;
  --release-green-soft: #f0fdf4;
  --comment-amber: #9a5800;
  --comment-amber-soft: #fff8e6;
  --module-violet: #5b3ea6;
  --module-violet-soft: #f5f3ff;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--dbms-bg);
  color: var(--dbms-ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.62;
}

#header,
#content,
#footer {
  box-sizing: border-box;
  max-width: 78rem;
  margin-left: auto;
  margin-right: auto;
}

#header {
  position: relative;
  display: flex;
  min-height: 13.5rem;
  flex-direction: column;
  justify-content: center;
  margin-top: 1.25rem;
  padding: 2.5rem clamp(24rem, 43vw, 33rem) 2.5rem clamp(1.5rem, 4vw, 3.5rem);
  overflow: hidden;
  color: #fff;
  background:
    radial-gradient(circle at 90% 10%, rgba(34, 211, 238, 0.24), transparent 24rem),
    linear-gradient(135deg, #0b2036 0%, var(--dbms-navy) 56%, var(--dbms-blue) 100%);
  border-radius: 1.1rem;
  box-shadow: 0 1rem 2.4rem rgba(16, 42, 67, 0.2);
}

#header::after {
  content: "";
  position: absolute;
  top: 50%;
  right: clamp(1.2rem, 3vw, 2.5rem);
  width: min(40vw, 31rem);
  aspect-ratio: 2172 / 724;
  background: url("./images/dbms-itc-logo-frameless.png") center / contain no-repeat;
  transform: translateY(-50%);
}

#header h1 {
  max-width: 52rem;
  margin: 0;
  color: #fff;
  font-size: clamp(2rem, 5vw, 3.45rem);
  line-height: 1.08;
  letter-spacing: -0.035em;
}

#header .details {
  margin-top: 1rem;
  color: #cceaf2;
}

#content {
  padding: 1.5rem clamp(0.9rem, 3vw, 2rem) 4rem;
}

a {
  color: #0e6f8a;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.16em;
}

a:hover,
a:focus {
  color: #0b4f66;
}

a:focus-visible {
  outline: 3px solid var(--dbms-focus);
  outline-offset: 3px;
  border-radius: 0.15rem;
}

.lead {
  max-width: 66rem;
  margin: 1.5rem auto;
  color: #263b55;
  font-size: clamp(1.15rem, 2.1vw, 1.45rem);
  line-height: 1.55;
}

.quick-links > .content > .ulist > ul {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.9rem;
  margin: 1.5rem 0;
  padding: 0;
  list-style: none;
}

.quick-links li {
  min-height: 5.1rem;
  margin: 0;
  padding: 1rem 1.1rem;
  color: var(--dbms-muted);
  background: var(--dbms-panel);
  border: 1px solid var(--dbms-border);
  border-radius: 0.7rem;
  box-shadow: 0 0.25rem 0.8rem rgba(20, 35, 59, 0.05);
}

.quick-links li:hover {
  border-color: #86c9d8;
  box-shadow: 0 0.5rem 1.15rem rgba(20, 35, 59, 0.09);
  transform: translateY(-1px);
}

.quick-links li a:first-child {
  color: var(--dbms-navy);
  font-size: 1.02rem;
}

#toc {
  margin: 2rem 0 2.7rem;
  padding: 1.2rem 1.4rem;
  background: #fff;
  border: 1px solid var(--dbms-border);
  border-radius: 0.75rem;
}

#toc .title {
  color: var(--dbms-navy);
  font-size: 1.1rem;
  font-weight: 700;
}

#toc ul {
  columns: 2;
  column-gap: 2rem;
}

#toc li {
  break-inside: avoid;
}

.sect1 {
  margin-top: 3.2rem;
}

h2,
h3 {
  color: var(--dbms-navy);
  letter-spacing: -0.018em;
}

h2 {
  padding-bottom: 0.45rem;
  border-bottom: 2px solid #dcecf1;
}

table.tableblock {
  width: 100%;
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--dbms-border);
  border-collapse: separate;
  border-spacing: 0;
  border-radius: 0.7rem;
  box-shadow: 0 0.2rem 0.7rem rgba(20, 35, 59, 0.04);
}

table.tableblock thead {
  color: #fff;
  background: var(--dbms-navy);
}

table.tableblock th,
table.tableblock td {
  padding: 0.78rem 0.85rem;
  vertical-align: top;
  border-color: var(--dbms-border);
}

table.tableblock tbody tr:nth-child(even) {
  background: #f8fafc;
}

table.release-switchboard {
  display: block;
  margin: 1.6rem 0;
  overflow: visible;
  background: transparent;
  border: 0;
  border-radius: 0;
  box-shadow: none;
}

table.release-switchboard colgroup {
  display: none;
}

table.release-switchboard tbody {
  display: block;
}

table.release-switchboard tr {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

table.release-switchboard td {
  display: block;
  min-height: 12.5rem;
  padding: 1.25rem 1.3rem;
  background: #fff;
  border: 1px solid var(--dbms-border);
  border-top-width: 0.42rem;
  border-radius: 0.8rem;
  box-shadow: 0 0.4rem 1rem rgba(20, 35, 59, 0.07);
}

table.release-switchboard td:nth-child(1) {
  background: linear-gradient(180deg, var(--release-green-soft), #fff 56%);
  border-top-color: var(--release-green);
}

table.release-switchboard td:nth-child(2) {
  background: linear-gradient(180deg, var(--comment-amber-soft), #fff 56%);
  border-top-color: var(--comment-amber);
}

table.release-switchboard td:nth-child(3) {
  background: linear-gradient(180deg, var(--module-violet-soft), #fff 56%);
  border-top-color: var(--module-violet);
}

.release-label,
.status-chip {
  display: inline-block;
  margin-bottom: 0.65rem;
  padding: 0.25rem 0.58rem;
  font-size: 0.74rem;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: 0.065em;
  border: 1px solid currentColor;
  border-radius: 999px;
}

.authoritative-label,
.authoritative-chip {
  color: var(--release-green);
  background: #dcfce7;
}

.comment-label,
.comment-chip {
  color: var(--comment-amber);
  background: #fef3c7;
}

.module-label,
.module-chip {
  color: var(--module-violet);
  background: #ede9fe;
}

.classification-note > .content {
  padding: 1rem 1.25rem;
  background: #fff;
  border: 1px solid var(--dbms-border);
  border-left: 0.38rem solid var(--dbms-blue);
  border-radius: 0.7rem;
}

.release-section > .sectionbody {
  padding: 1.25rem 1.4rem 1.5rem;
  background: #fff;
  border: 1px solid var(--dbms-border);
  border-radius: 0 0 0.85rem 0.85rem;
  box-shadow: 0 0.35rem 1rem rgba(20, 35, 59, 0.055);
}

.release-section > h2 {
  margin-bottom: 0;
  padding: 0.85rem 1.2rem;
  color: #fff;
  border: 0;
  border-radius: 0.85rem 0.85rem 0 0;
}

.authoritative-section > h2 {
  background: linear-gradient(135deg, #14532d, var(--release-green));
}

.public-comment-section > h2 {
  background: linear-gradient(135deg, #78350f, var(--comment-amber));
}

.module-review-section > h2 {
  background: linear-gradient(135deg, #44308a, var(--module-violet));
}

.release-section > h2 a,
.release-section > h2 a:hover,
.release-section > h2 a:focus {
  color: #fff;
}

.architecture-list > ol {
  counter-reset: architecture;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin: 1.3rem 0;
  padding: 0;
  list-style: none;
}

.architecture-list > ol > li {
  position: relative;
  min-height: 5rem;
  margin: 0;
  padding: 1.1rem 1.15rem 1.1rem 3.7rem;
  background: #fff;
  border: 1px solid var(--dbms-border);
  border-radius: 0.75rem;
}

.architecture-list > ol > li::before {
  counter-increment: architecture;
  content: counter(architecture);
  position: absolute;
  top: 1rem;
  left: 1rem;
  display: grid;
  width: 2rem;
  height: 2rem;
  place-items: center;
  color: #fff;
  font-weight: 800;
  background: var(--dbms-blue);
  border-radius: 999px;
}

.page-note {
  margin-top: 3rem;
  padding: 1rem 1.2rem;
  color: var(--dbms-muted);
  background: #eef3f7;
  border-radius: 0.65rem;
}

#footer {
  padding: 1.2rem 2rem 2.5rem;
  color: var(--dbms-muted);
  background: transparent;
}

@media (max-width: 52rem) {
  #header {
    display: block;
    min-height: 0;
    margin-top: 0;
    padding: 2.25rem 1.35rem 1.5rem;
    border-radius: 0 0 1rem 1rem;
  }

  #header::after {
    position: relative;
    top: auto;
    right: auto;
    display: block;
    width: min(100%, 26rem);
    margin: 1.25rem auto 0;
    transform: none;
  }

  .quick-links > .content > .ulist > ul,
  .architecture-list > ol {
    grid-template-columns: 1fr;
  }

  table.release-switchboard tr {
    grid-template-columns: 1fr;
  }

  table.release-switchboard td {
    min-height: 0;
  }

  #toc ul {
    columns: 1;
  }

  table.tableblock {
    display: block;
    overflow-x: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .quick-links li {
    transition: none;
  }
}