/* Match the section and card vocabulary of /use-cases/. */
.security-main { flex: 1; }
.security-main [id] { scroll-margin-top: 120px; }
@media (max-width: 640px) { .security-main [id] { scroll-margin-top: 150px; } }
.security-hero, .security-content { padding: clamp(40px, 7vw, 56px) clamp(18px, 5vw, 32px); }
.security-hero { background: #FDF6E7; border-bottom: 1px solid var(--color-border); }
.security-wrap { max-width: 1080px; margin: 0 auto; }
.security-back a { color: var(--color-accent); text-decoration: underline; text-underline-offset: 3px; }
.security-label { margin: 0 0 6px; font-family: var(--font-mono); font-size: 12px; letter-spacing: .12em; color: var(--color-accent); }
.security-wrap h1 { max-width: 760px; margin: 0 0 14px; font-size: clamp(27px, 4vw, 38px); line-height: 1.4; letter-spacing: -.025em; text-wrap: pretty; }
.security-opening { max-width: 640px; margin: 0 0 12px; font-size: 17px; line-height: 1.8; text-wrap: pretty; }
.security-lead { max-width: 640px; margin: 0; font-size: 15.5px; line-height: 1.8; color: var(--color-text-secondary); text-wrap: pretty; }
.security-sections { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.security-section, .security-card { padding: 22px 24px; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-card); box-shadow: var(--shadow-card); }
.security-section h2 { margin: 0 0 10px; font-size: clamp(22px, 3vw, 28px); line-height: 1.3; letter-spacing: -.02em; text-wrap: pretty; }
.security-section p, .security-card p { margin: 0; font-size: 15px; line-height: var(--leading-normal); color: var(--color-text-secondary); text-wrap: pretty; }
.security-more, .security-featured a, .security-card a { color: var(--color-accent); font-weight: 600; text-decoration: underline; text-underline-offset: 3px; }
.security-more, .security-featured a { display: inline-flex; align-items: center; min-height: 44px; margin-top: 12px; }
.security-cards { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.security-card h2 { margin: 0 0 8px; font-size: 17px; line-height: 1.45; letter-spacing: -.01em; text-wrap: pretty; }
.security-card h2 a { display: inline-flex; align-items: center; min-height: 44px; }
.security-card .security-device { margin-top: 12px; font-size: 13.5px; }
.security-back { margin: 30px 0 0; font-size: 15px; }
.security-wrap a:focus-visible { outline: none; box-shadow: var(--focus-ring); border-radius: 2px; }
@media (max-width: 640px) {
  .security-sections, .security-cards { grid-template-columns: 1fr; }
  .security-section, .security-card { padding: 21px 19px; }
}

/* The entrance uses separate treatments for its five reading tasks. */
.security-entrance .security-hero { padding-block: clamp(28px, 5vw, 40px); }
.security-hero-inner { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); align-items: center; gap: clamp(20px, 3vw, 36px); }
.security-hero-art { display: block; width: 100%; height: auto; border-radius: var(--radius-card); }
.security-block { padding: clamp(36px, 6vw, 60px) clamp(18px, 5vw, 32px); }
.security-block h2 { margin: 0 0 8px; font-size: clamp(22px, 2.8vw, 28px); line-height: 1.4; letter-spacing: -.02em; }
.security-section-intro { max-width: 740px; margin: 0 0 24px; color: var(--color-text-secondary); font-size: 15px; line-height: 1.8; }
.security-areas { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border-top: 1px solid var(--color-border-strong); border-left: 1px solid var(--color-border-strong); }
.security-area { min-width: 0; padding: 23px 26px; border-right: 1px solid var(--color-border-strong); border-bottom: 1px solid var(--color-border-strong); scroll-margin-top: 28px; }
.security-area:target { background: var(--color-accent-soft); }
.security-area-head { display: flex; gap: 12px; align-items: center; margin-bottom: 8px; }
.security-area-icon { display: inline-flex; align-items: center; justify-content: center; width: 38px; height: 38px; flex: none; border-radius: 10px; background: var(--color-accent-soft); color: var(--color-accent); }
.security-area-icon svg { width: 23px; height: 23px; }
.security-area h3 { margin: 0; font-size: 18px; line-height: 1.5; }
.security-area p { margin: 0 0 13px; font-size: 15px; line-height: 1.7; }
.security-area dl, .security-today-item dl { margin: 0; }
.security-area dl div { display: flex; gap: 12px; margin-top: 5px; font-size: 14px; line-height: 1.7; }
.security-area dt { flex: 0 0 4.5em; color: var(--color-text-secondary); }
.security-area dd, .security-today-item dd { margin: 0; }
.security-situations { background: var(--color-surface-sunken); }
.security-situations ul, .security-articles ul, .security-sources ul { margin: 0; padding: 0; list-style: none; }
.security-situations ul { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px 18px; }
.security-situations a { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 2px 12px; align-items: center; min-height: 58px; padding: 11px 15px; border: 1px solid var(--color-border); border-radius: 8px; background: var(--color-surface); color: var(--color-text-primary); text-decoration: none; font-size: 14px; line-height: 1.5; }
.security-situations a:hover { border-color: var(--color-accent); }
.security-situations a strong { color: var(--color-accent); font-weight: 600; }
.security-task-list li { min-width: 0; }
.security-task-list a { min-height: 72px; border-radius: 8px 8px 0 0; }
.security-task-meta { display: block; margin: 0; padding: 0 15px 13px; border: 1px solid var(--color-border); border-top: 0; border-radius: 0 0 8px 8px; background: var(--color-surface); color: var(--color-text-secondary); font-size: 13px; line-height: 1.7; }
.security-today-list { border-top: 1px solid var(--color-border-strong); }
.security-today-item { display: grid; grid-template-columns: minmax(180px, 26%) minmax(0, 1fr); gap: 24px; padding: 22px 0; border-bottom: 1px solid var(--color-border); }
.security-today-heading { display: flex; gap: 12px; align-items: baseline; }
.security-today-heading > span { font-family: var(--font-mono); font-size: 13px; color: var(--color-accent); }
.security-today-item h3 { margin: 0; font-size: 18px; line-height: 1.55; }
.security-today-item dl { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.security-today-item dt { margin-bottom: 4px; color: var(--color-accent); font-size: 13px; font-weight: 600; }
.security-today-item dd { font-size: 14px; line-height: 1.75; }
.security-today-note { max-width: 760px; margin: 17px 0 0; color: var(--color-text-secondary); font-size: 14px; line-height: 1.8; }
.security-family-together { background: #FDF6E7; border-block: 1px solid var(--color-border); }
.security-family-together .security-wrap { max-width: 760px; }
.security-family-together p { margin: 0; font-size: 16px; line-height: 1.9; }
.security-articles-heading { display: flex; align-items: end; justify-content: space-between; gap: 16px; }
.security-articles-heading .security-section-intro { margin-bottom: 18px; }
.security-articles ul { border-top: 1px solid var(--color-border-strong); }
.security-articles li { border-bottom: 1px solid var(--color-border); }
.security-articles li a { display: flex; align-items: center; gap: 18px; min-height: 74px; padding: 14px 4px; color: var(--color-text-primary); text-decoration: none; }
.security-articles li a:hover strong { text-decoration: underline; text-underline-offset: 3px; }
.security-article-kind { flex: 0 0 6em; color: var(--color-accent); font-size: 13px; font-weight: 600; }
.security-article-text { display: grid; gap: 3px; flex: 1; min-width: 0; font-size: 14px; line-height: 1.5; }
.security-article-text strong { font-size: 16px; }
.security-article-text > span { color: var(--color-text-secondary); }
.security-article-arrow { color: var(--color-accent); }
.security-sources { padding: 28px clamp(18px, 5vw, 32px) 40px; border-top: 1px solid var(--color-border); }
.security-sources h2 { margin: 0 0 6px; font-size: 16px; }
.security-sources p, .security-sources li { margin: 0; font-size: 13px; line-height: 1.8; color: var(--color-text-secondary); }
.security-sources ul { margin-top: 10px; }
.security-sources li + li { margin-top: 4px; }
.security-sources a { color: var(--color-accent); text-decoration: underline; text-underline-offset: 3px; }
.security-home .home-hero { position: relative; overflow: hidden; padding-block: clamp(32px, 4vw, 50px); }
.home-hero-inner { position: static; }
.home-hero-copy { position: relative; z-index: 1; max-width: 550px; }
.home-hero-copy h1 { max-width: none; }
.home-hero-copy .security-opening { max-width: 490px; }
.home-hero-copy .security-lead { max-width: 490px; font-size: 15px; }
.home-hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 8px 22px; margin-top: 23px; }
.home-hero-actions .btn-primary { min-height: 48px; }
.home-roles-link { display: inline-flex; align-items: center; min-height: 44px; color: var(--color-accent); font-weight: 600; text-decoration: underline; text-underline-offset: 3px; }
.home-hero-art { position: absolute; inset: 0 0 0 auto; display: block; width: min(78vw, 1250px); height: 100%; -webkit-mask-image: linear-gradient(to right, transparent, #000 30%); mask-image: linear-gradient(to right, transparent, #000 30%); }
.home-hero-art img { display: block; width: 100%; height: 100%; object-fit: cover; object-position: center; }
@media (min-width: 1200px) {
  .security-home .home-hero { padding-block: clamp(56px, 6vw, 86px); }
}
@media (max-width: 1199px) {
  .security-home .home-hero { padding-bottom: 0; }
  .home-hero-copy { max-width: 660px; }
  .home-hero-art { position: relative; inset: auto; width: 100vw; height: auto; margin: 20px calc(50% - 50vw) 0; -webkit-mask-image: none; mask-image: none; }
  .home-hero-art img { height: auto; }
}
#home-roles-title { scroll-margin-top: 110px; }
.security-home .security-block { padding-block: clamp(28px, 4vw, 42px); }
.security-home .security-section-intro { margin-bottom: 16px; }
.home-role-diagram { display: grid; grid-template-columns: minmax(0, 1fr) minmax(180px, .9fr) minmax(0, 1fr); grid-template-areas: "prepare center check" ". recover ."; gap: 20px 30px; align-items: center; padding: 22px; border: 1px solid var(--color-border-strong); border-radius: var(--radius-card); background: var(--color-surface-sunken); }
.home-role-center { grid-area: center; display: grid; place-items: center; min-height: 130px; padding: 18px; border: 2px solid var(--color-accent); border-radius: 50%; background: var(--color-surface); color: var(--color-text-primary); text-align: center; font-size: 20px; line-height: 1.4; }
.home-role { position: relative; padding: 17px 19px; border: 1px solid var(--color-border-strong); border-radius: 10px; background: var(--color-surface); }
.home-role-prepare { grid-area: prepare; }
.home-role-check { grid-area: check; }
.home-role-recover { grid-area: recover; }
.home-role::after { position: absolute; content: ""; display: block; border-top: 2px dotted var(--color-accent); width: 30px; top: 50%; }
.home-role-prepare::after { left: 100%; }
.home-role-check::after { right: 100%; }
.home-role-recover::after { width: 0; height: 20px; border-top: 0; border-left: 2px dotted var(--color-accent); bottom: 100%; left: 50%; top: auto; }
.home-role h3 { margin: 0 0 5px; font-size: 17px; line-height: 1.5; }
.home-role p { margin: 0; font-size: 14px; line-height: 1.6; }
.home-role .home-role-examples { margin-top: 7px; color: var(--color-text-secondary); }
.home-example { max-width: 800px; margin: 16px 0 0; font-size: 15px; line-height: 1.8; }
.home-menu { background: var(--color-surface-sunken); scroll-margin-top: 110px; }
.home-menu ul { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; margin: 0; padding: 0; list-style: none; }
.home-menu a { display: flex; justify-content: space-between; align-items: center; min-height: 52px; padding: 10px 16px; border: 1px solid var(--color-border); border-radius: 8px; background: var(--color-surface); color: var(--color-accent); font-weight: 600; text-decoration: none; }
.home-menu a:hover { border-color: var(--color-accent); text-decoration: underline; }
.home-checks { border-top: 1px solid var(--color-border-strong); }
.home-check { display: grid; grid-template-columns: 22% minmax(0, 1fr); column-gap: 24px; padding: 20px 0; border-bottom: 1px solid var(--color-border); scroll-margin-top: 24px; }
.home-check:target { background: var(--color-accent-soft); }
.home-check h3 { grid-column: 1; margin: 0; font-size: 19px; line-height: 1.5; }
.home-check-roles { grid-column: 1; margin: 5px 0 0; color: var(--color-text-secondary); font-size: 13px; line-height: 1.6; }
.home-check dl { display: grid; grid-column: 2; grid-row: 1 / span 2; gap: 7px; margin: 0; }
.home-check dl div { display: grid; grid-template-columns: 7em minmax(0, 1fr); align-items: start; gap: 12px; font-size: 14px; line-height: 1.75; }
.home-check dt { color: var(--color-accent); font-weight: 600; white-space: nowrap; }
.home-check dd { margin: 0; }
.home-details, .home-roles { scroll-margin-top: 120px; }
.home-check dl a { color: var(--color-accent); text-decoration: underline; text-underline-offset: 3px; }
.home-check dl a:focus-visible { box-shadow: var(--focus-ring); }
.security-home .home-check { grid-template-columns: minmax(180px, 18%) minmax(0, 1fr); column-gap: 16px; }
.security-home .home-check dl { grid-row: 1; }
.security-home .home-check dl div { grid-template-columns: 7em minmax(0, 1fr); }
@media (max-width: 900px) {
  .security-home .home-check { grid-template-columns: 1fr; }
  .security-home .home-check dl { grid-row: auto; margin-top: 10px; }
}
@media (max-width: 640px) {
  .security-home .home-check dl div { grid-template-columns: 1fr; }
}
.home-end .home-related-title { margin-top: 28px; margin-bottom: 12px; }
@media (max-width: 900px) {
  .home-check { grid-template-columns: 1fr; }
  .home-check dl { grid-column: 1; grid-row: auto; margin-top: 10px; }
  .home-role-diagram { grid-template-columns: 1fr; grid-template-areas: "center" "prepare" "check" "recover"; gap: 17px; padding: 18px; }
  .home-role-center { min-height: 80px; width: min(100%, 280px); justify-self: center; border-radius: 40px; }
  .home-role::after { width: 0; height: 17px; top: auto; bottom: 100%; left: 50%; right: auto; border-top: 0; border-left: 2px dotted var(--color-accent); }
}
@media (max-width: 760px) {
  #home-roles-title, .home-menu { scroll-margin-top: 140px; }
  .home-hero-copy { max-width: none; }
  .home-hero-copy h1 { font-size: clamp(27px, 7vw, 34px); }
  html[lang="ja"] .home-hero-copy .security-lead { max-width: 18em; }
  .home-hero-actions { margin-top: 20px; }
  .security-hero-inner { grid-template-columns: 1fr; }
  .security-hero-figure { display: none; }
  .security-today-item { grid-template-columns: 1fr; gap: 10px; }
  .security-today-item dl { gap: 12px; }
  .home-menu ul { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
  .security-areas, .security-situations ul { grid-template-columns: 1fr; }
  .security-entrance .security-hero { padding-block: 25px; }
  .security-block { padding-block: 34px; }
  .security-area { padding: 18px; }
  .security-today-item dl { grid-template-columns: 1fr; gap: 8px; }
  .security-today-item dl div { display: grid; grid-template-columns: 6.5em minmax(0, 1fr); gap: 8px; }
  .security-today-item dt { margin: 0; }
  .security-articles-heading { display: block; }
  .security-articles-heading .security-section-intro { margin-bottom: 0; }
  .security-more { margin-bottom: 12px; }
  .security-articles li a { gap: 7px 12px; flex-wrap: wrap; }
  .security-article-kind { flex-basis: auto; }
  .security-article-text { flex-basis: calc(100% - 90px); }
  .home-menu ul { grid-template-columns: 1fr; }
  .home-check dl div { grid-template-columns: 1fr; gap: 0; }
}
@media (max-width: 360px) {
  .home-hero-copy h1 { font-size: 24px; }
}

/* A practical Guide keeps the device choices close to the article opening. */
.device-updates-wrap { max-width: 824px; padding: 26px clamp(20px, 5vw, 32px) 54px; }
.device-updates-crumb { margin-bottom: 20px; color: var(--color-text-secondary); font-size: 13px; line-height: 1.7; }
.device-updates-crumb a { color: var(--color-accent); }
.device-updates-crumb span { margin-inline: 4px; }
.device-updates-head { padding-bottom: 26px; border-bottom: 1px solid var(--color-border); }
.device-updates-head h1 { margin-bottom: 16px; font-size: clamp(28px, 3vw, 35px); }
.device-updates p, .device-updates li { font-size: 16px; line-height: 1.85; }
.device-updates p { margin: 0 0 14px; }
.device-updates article > section { padding-top: 30px; }
.device-updates article > section + section { margin-top: 24px; border-top: 1px solid var(--color-border); }
.device-updates h2 { margin: 0 0 15px; font-size: clamp(22px, 3vw, 27px); line-height: 1.45; }
.device-updates h3 { margin: 0 0 12px; font-size: 20px; line-height: 1.5; }
.device-updates a { color: var(--color-accent); text-decoration: underline; text-underline-offset: 3px; }
.device-updates ol, .device-updates ul { margin: 0 0 18px; padding-left: 1.5em; }
.device-updates li { padding-left: 2px; }
.device-updates li + li { margin-top: 7px; }
.device-updates-jump { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 8px; margin-top: 22px; }
.device-updates-jump a { display: flex; align-items: center; justify-content: center; min-height: 48px; padding: 9px 8px; border: 1px solid var(--color-border); border-radius: 8px; background: var(--color-surface); font-size: 14px; font-weight: 600; line-height: 1.4; text-align: center; text-decoration: none; }
.device-updates-jump a:hover { border-color: var(--color-accent); text-decoration: underline; }
.device-updates article section > section { margin-top: 30px; padding-top: 24px; border-top: 1px solid var(--color-border); }
.device-updates section[id] { scroll-margin-top: 120px; }
.device-updates section[id]:target { background: var(--color-accent-soft); }
.device-updates-official { margin-top: 16px; }
.device-updates-table { width: 100%; margin: 16px 0 20px; border-collapse: collapse; font-size: 15px; line-height: 1.7; }
.device-updates-table th, .device-updates-table td { width: 50%; padding: 12px 15px; border: 1px solid var(--color-border-strong); text-align: left; vertical-align: top; }
.device-updates-table thead { background: var(--color-surface-sunken); }
.device-updates-table tbody th { font-weight: 600; }
.device-updates-back { margin-top: 20px !important; }
.device-updates-sources { padding: 22px 20px 24px; border-left: 3px solid var(--color-border-strong); background: var(--color-surface-sunken); color: var(--color-text-secondary); }
.device-updates-sources h2 { font-size: 18px; }
.device-updates-sources p, .device-updates-sources li { font-size: 13px; line-height: 1.8; }
.device-updates-sources ul { margin-bottom: 0; }
.account-recovery-jump { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.account-recovery section[id]:target { background: var(--color-accent-soft); }
.account-recovery h3 ~ h3 { margin-top: 30px; }
.photo-sharing .device-updates-jump { grid-template-columns: repeat(3, minmax(0, 1fr)); }
@media (max-width: 640px) {
  .device-updates-wrap { padding-top: 19px; }
  .device-updates section[id] { scroll-margin-top: 140px; }
  .device-updates-jump { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .device-updates-table thead { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
  .device-updates-table, .device-updates-table tbody, .device-updates-table tr, .device-updates-table th, .device-updates-table td { display: block; width: 100%; }
  .device-updates-table tr { margin-bottom: 10px; border: 1px solid var(--color-border-strong); }
  .device-updates-table th, .device-updates-table td { border: 0; }
  .device-updates-table th { background: var(--color-surface-sunken); }
  .device-updates-table td { border-top: 1px solid var(--color-border); }
  .device-updates-table td::before { display: block; content: attr(data-label); margin-bottom: 2px; color: var(--color-text-secondary); font-size: 13px; font-weight: 600; }
  .photo-sharing .device-updates-jump { grid-template-columns: 1fr; }
}