html {
  scroll-behavior: smooth;
  scroll-padding-top: 7rem;
  -webkit-text-size-adjust: 100%;
}

.security-handbook,
.security-handbook *,
.security-handbook *::before,
.security-handbook *::after {
  box-sizing: border-box;
}

body.security-handbook {
  --paper: #f1f1ec;
  --paper-2: #fafaf7;
  --paper-3: #e7e7e1;
  --ink: #0a0c0d;
  --ink-2: #171b1d;
  --ink-muted: #5c6467;
  --ink-soft: #7d8587;
  --line: rgba(10, 12, 13, 0.12);
  --line-strong: rgba(10, 12, 13, 0.22);
  --signal: #d8ff3e;
  --green: #2f7656;
  --amber: #8b6419;
  --red: #a13f36;
  --invert-bg: #0a0c0d;
  --invert-fg: #f1f1ec;
  --font-sans: "Inter Tight", "Arial Narrow", Arial, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --maxw: 1280px;
  --pad: clamp(20px, 4vw, 64px);
  min-width: 20rem;
  margin: 0;
  overflow-x: hidden;
  background: var(--paper);
  color: var(--ink-2);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  letter-spacing: -0.01em;
}

.security-handbook a {
  color: inherit;
  text-decoration: none;
}

.security-handbook ::selection {
  background: var(--signal);
  color: var(--ink);
}

.security-handbook :focus-visible {
  outline: 2px solid #4d91d8;
  outline-offset: 4px;
}

.security-handbook .skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 100;
  padding: 0.7rem 0.9rem;
  background: var(--ink);
  color: var(--paper);
  font: 500 0.72rem/1 var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transform: translateY(-160%);
  transition: transform 160ms ease;
}

.security-handbook .skip-link:focus {
  transform: translateY(0);
}

.security-handbook .handbook-header {
  position: sticky;
  top: 0;
  z-index: 30;
  height: 5rem;
  border-bottom: 1px solid var(--line);
  background: var(--paper);
}

.security-handbook .handbook-header__in {
  width: 100%;
  max-width: var(--maxw);
  height: 100%;
  margin: 0 auto;
  padding-inline: var(--pad);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.security-handbook .handbook-header__nav {
  display: flex;
  align-items: center;
  gap: clamp(1.25rem, 3vw, 2.75rem);
}

.security-handbook .handbook-brand {
  font-size: 1.08rem;
  font-weight: 600;
  letter-spacing: -0.025em;
  white-space: nowrap;
}

.security-handbook .handbook-back,
.security-handbook .handbook-header__meta {
  color: var(--ink-muted);
  font: 500 0.66rem/1.35 var(--font-mono);
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.security-handbook .handbook-back {
  min-height: 2.75rem;
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  transition: color 180ms ease;
}

.security-handbook .handbook-back:hover,
.security-handbook .handbook-back:focus-visible {
  color: var(--ink);
}

.security-handbook .handbook-header__meta {
  text-align: right;
  white-space: nowrap;
}

.security-handbook .hero {
  position: relative;
  overflow: visible;
  padding: clamp(4.5rem, 7vw, 6.5rem) 0 clamp(4.5rem, 8vw, 7.5rem);
  border-bottom: 1px solid var(--line);
}

.security-handbook .hero::before {
  display: none;
}

.security-handbook .hero__in {
  max-width: var(--maxw);
  margin: 0 auto;
  padding-inline: var(--pad);
}

.security-handbook .kicker,
.security-handbook .toc-label {
  display: block;
  color: var(--ink-muted);
  font: 500 0.68rem/1.4 var(--font-mono);
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.security-handbook .kicker__dot {
  display: none;
}

.security-handbook .hero h1 {
  max-width: 10ch;
  margin: 2.1rem 0 2.4rem;
  color: var(--ink);
  font-size: clamp(4.2rem, 8.5vw, 8rem);
  font-weight: 500;
  line-height: 0.87;
  letter-spacing: -0.055em;
  text-transform: none;
  text-wrap: balance;
}

.security-handbook .hero__sub {
  max-width: 48ch;
  margin: 0;
  color: var(--ink-2);
  font-size: clamp(1.2rem, 2.2vw, 1.55rem);
  line-height: 1.38;
  letter-spacing: -0.022em;
}

.security-handbook .hero__meta {
  max-width: 52rem;
  margin-top: clamp(3rem, 6vw, 5.5rem);
  padding-top: 1.35rem;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1.5rem;
  border-top: 1px solid var(--line);
}

.security-handbook .hero__meta div {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.security-handbook .hero__meta .ml {
  color: var(--ink-muted);
  font: 500 0.62rem/1.3 var(--font-mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.security-handbook .hero__meta .mv {
  color: var(--ink);
  font-size: 0.98rem;
  font-weight: 500;
}

.security-handbook .dl {
  margin-top: 2.25rem;
}

.security-handbook .handbook-pdf {
  min-height: 2.75rem;
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--ink);
  font-size: 1rem;
  font-weight: 500;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.3em;
}

.security-handbook .handbook-pdf span {
  transition: transform 180ms ease;
}

.security-handbook .handbook-pdf:hover span,
.security-handbook .handbook-pdf:focus-visible span {
  transform: translate(0.15rem, -0.15rem);
}

.security-handbook .wrap {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--pad);
  display: grid;
  grid-template-columns: minmax(14rem, 17rem) minmax(0, 47rem);
  justify-content: space-between;
  gap: clamp(3.5rem, 8vw, 8rem);
}

.security-handbook nav.toc {
  position: sticky;
  top: 5rem;
  align-self: start;
  max-height: calc(100vh - 5rem);
  overflow-y: auto;
  padding: 5.5rem 0 4rem;
  scrollbar-width: thin;
  scrollbar-color: var(--line-strong) transparent;
}

.security-handbook .toc-label {
  margin-bottom: 1.35rem;
}

.security-handbook nav.toc a {
  position: relative;
  display: grid;
  grid-template-columns: 2rem minmax(0, 1fr);
  gap: 0.45rem;
  align-items: baseline;
  padding: 0.55rem 0;
  border-radius: 0;
  color: var(--ink-muted);
  font-size: 0.78rem;
  line-height: 1.35;
  transition: color 180ms ease;
}

.security-handbook nav.toc a::before {
  position: absolute;
  top: 1rem;
  left: -0.85rem;
  width: 0.28rem;
  height: 0.28rem;
  content: "";
  background: var(--signal);
  opacity: 0;
  transition: opacity 180ms ease;
}

.security-handbook nav.toc a:hover,
.security-handbook nav.toc a.on {
  background: transparent;
  color: var(--ink);
}

.security-handbook nav.toc a.on::before {
  opacity: 1;
}

.security-handbook .toc-n,
.security-handbook nav.toc a.on .toc-n {
  color: var(--ink-muted);
  font: 500 0.62rem/1.4 var(--font-mono);
}

.security-handbook main {
  width: 100%;
  max-width: 47rem;
  min-width: 0;
  padding: 5.5rem 0 9rem;
}

.security-handbook .sec {
  padding: 0 0 clamp(5rem, 8vw, 7.5rem);
  scroll-margin-top: 7rem;
}

.security-handbook .sec + .sec {
  padding-top: clamp(4.5rem, 7vw, 6.5rem);
  border-top: 1px solid var(--line);
}

.security-handbook .sec-title {
  max-width: 17ch;
  margin: 1.15rem 0 2.3rem;
  color: var(--ink);
  font-size: clamp(2.45rem, 4.5vw, 4.15rem);
  font-weight: 500;
  line-height: 0.96;
  letter-spacing: -0.045em;
  text-transform: none;
  text-wrap: balance;
}

.security-handbook h3 {
  margin: 2.6em 0 0.65em;
  color: var(--ink);
  font-size: 1.3rem;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.025em;
}

.security-handbook h4 {
  margin: 2.1em 0 0.55em;
  color: var(--ink-muted);
  font: 600 0.72rem/1.4 var(--font-mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.security-handbook p,
.security-handbook li {
  color: var(--ink-2);
  font-size: 1.08rem;
  line-height: 1.68;
}

.security-handbook p {
  margin: 0.85em 0;
}

.security-handbook strong {
  color: var(--ink);
  font-weight: 600;
}

.security-handbook ul.bul,
.security-handbook ol.bul {
  margin: 1.2rem 0 1.8rem;
  padding-left: 1.35rem;
}

.security-handbook ul.bul li,
.security-handbook ol.bul li {
  margin: 0.65rem 0;
  padding-left: 0.35rem;
}

.security-handbook ul.bul li::marker,
.security-handbook ol.bul li::marker {
  color: var(--ink-muted);
  font-family: var(--font-mono);
}

.security-handbook .checklist {
  margin: 1.2rem 0 1.8rem;
  padding: 0;
  list-style: none;
}

.security-handbook .checklist li {
  position: relative;
  margin: 0.7rem 0;
  padding-left: 2rem;
}

.security-handbook .chk {
  position: absolute;
  top: 0.43rem;
  left: 0;
  width: 0.9rem;
  height: 0.9rem;
  border: 1px solid var(--ink-muted);
  border-radius: 0;
}

.security-handbook .tw {
  margin: 2rem 0 2.5rem;
  overflow-x: auto;
  border: 0;
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
  border-radius: 0;
  background: transparent;
}

.security-handbook table {
  width: 100%;
  min-width: 36rem;
  border-collapse: collapse;
  font-size: 0.94rem;
}

.security-handbook th {
  padding: 0.95rem 1rem 0.95rem 0;
  background: transparent;
  color: var(--ink-muted);
  font: 600 0.66rem/1.4 var(--font-mono);
  letter-spacing: 0.1em;
  text-align: left;
  text-transform: uppercase;
}

.security-handbook td {
  padding: 1rem 1rem 1rem 0;
  border-top: 1px solid var(--line);
  color: var(--ink-2);
  line-height: 1.5;
  vertical-align: top;
}

.security-handbook tbody tr:nth-child(even) {
  background: transparent;
}

.security-handbook .call,
.security-handbook .call.best,
.security-handbook .call.warn,
.security-handbook .call.dont {
  margin: 2.2rem 0;
  padding: 0.1rem 0 0.1rem 1.35rem;
  display: block;
  border: 0;
  border-left: 2px solid var(--ink);
  border-radius: 0;
  background: transparent;
}

.security-handbook .call.best {
  border-left-color: var(--green);
}

.security-handbook .call.warn {
  border-left-color: var(--amber);
}

.security-handbook .call.dont {
  border-left-color: var(--red);
}

.security-handbook .call-l,
.security-handbook .call.best .call-l,
.security-handbook .call.warn .call-l,
.security-handbook .call.dont .call-l {
  margin-bottom: 0.45rem;
  color: var(--ink-muted);
  font: 600 0.66rem/1.4 var(--font-mono);
  letter-spacing: 0.12em;
}

.security-handbook .call-b {
  color: var(--ink-2);
  font-size: 1rem;
  line-height: 1.62;
}

.security-handbook footer {
  margin: 0;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  background: var(--invert-bg);
  color: var(--ink-soft);
}

.security-handbook .footer__in {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 3rem var(--pad);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.security-handbook .footer__in .ft,
.security-handbook .footer__in small,
.security-handbook footer a {
  font: 500 0.7rem/1.5 var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.security-handbook .footer__in .ft {
  color: var(--invert-fg);
}

.security-handbook .footer__in small {
  color: var(--ink-soft);
}

.security-handbook footer a {
  color: var(--invert-fg);
  text-decoration: underline;
  text-underline-offset: 0.25em;
}

@media (max-width: 900px) {
  .security-handbook .handbook-header__meta {
    display: none;
  }

  .security-handbook .wrap {
    padding: 0;
    display: block;
  }

  .security-handbook nav.toc {
    position: sticky;
    top: 5rem;
    z-index: 20;
    max-height: none;
    padding: 0 var(--pad);
    display: flex;
    overflow-x: auto;
    border-bottom: 1px solid var(--line);
    background: var(--paper);
    columns: auto;
    scrollbar-width: none;
  }

  .security-handbook nav.toc::-webkit-scrollbar {
    display: none;
  }

  .security-handbook .toc-label {
    display: none;
  }

  .security-handbook nav.toc a {
    min-width: min(72vw, 16rem);
    min-height: 4rem;
    padding: 0.8rem 1.25rem 0.8rem 0;
    display: grid;
    align-content: center;
    flex: none;
    border-right: 1px solid var(--line);
  }

  .security-handbook nav.toc a + a {
    padding-left: 1.25rem;
  }

  .security-handbook nav.toc a::before {
    display: none;
  }

  .security-handbook main {
    max-width: 47rem;
    margin-inline: auto;
    padding: 4.5rem var(--pad) 7rem;
  }
}

@media (max-width: 640px) {
  .security-handbook .handbook-header {
    height: 4.5rem;
  }

  .security-handbook .handbook-header__in {
    gap: 1rem;
  }

  .security-handbook .handbook-back {
    font-size: 0;
    letter-spacing: 0;
  }

  .security-handbook .handbook-back span {
    font: 500 1.2rem/1 var(--font-sans);
  }

  .security-handbook .hero {
    padding: 4.5rem 0 4rem;
  }

  .security-handbook .hero h1 {
    margin-block: 1.6rem 1.9rem;
    font-size: clamp(3.25rem, 16vw, 5.2rem);
    line-height: 0.9;
  }

  .security-handbook .hero__meta {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    row-gap: 1.25rem;
  }

  .security-handbook nav.toc {
    top: 4.5rem;
  }

  .security-handbook main {
    padding-top: 3.75rem;
  }

  .security-handbook .sec-title {
    font-size: clamp(2.35rem, 12vw, 3.35rem);
  }

  .security-handbook p,
  .security-handbook li {
    font-size: 1rem;
  }

  .security-handbook .footer__in {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  .security-handbook *,
  .security-handbook *::before,
  .security-handbook *::after {
    animation: none !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}

@media print {
  body.security-handbook {
    background: #fff;
    color: #000;
    font-size: 10pt;
  }

  .security-handbook .skip-link,
  .security-handbook .handbook-header,
  .security-handbook nav.toc,
  .security-handbook .dl,
  .security-handbook footer {
    display: none !important;
  }

  .security-handbook .hero {
    padding: 0 0 2cm;
    border-bottom: 1px solid #bbb;
  }

  .security-handbook .hero h1 {
    max-width: none;
    font-size: 38pt;
  }

  .security-handbook .wrap {
    display: block;
    max-width: none;
    padding: 0;
  }

  .security-handbook main {
    max-width: none;
    padding: 1.5cm 0 0;
  }

  .security-handbook .sec {
    break-inside: avoid;
    padding-bottom: 1.3cm;
  }

  .security-handbook .sec-title {
    font-size: 24pt;
  }

  .security-handbook .tw,
  .security-handbook table,
  .security-handbook .call {
    break-inside: avoid;
  }
}