.nisa-page { padding-top: 36px; }
.nisa-page .content-width { max-width: 1120px; }
.nisa-hero { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); gap: 40px; align-items: center; padding: 38px 0 42px; }
.content-page.nisa-page h1.finsight-heading-primary { font-family: inherit; font-size: clamp(2rem, 4.2vw, 3.4rem); font-weight: 800; line-height: 1.35; letter-spacing: -.025em; }
.nisa-page .eyebrow { margin-bottom: 12px; color: var(--teal); }
.nisa-lead { margin: 24px 0 16px; color: var(--muted); line-height: 1.9; }
.nisa-meta { color: var(--muted); font-size: .82rem; }
.nisa-start { padding: 26px; background: var(--surface); border: 1px solid var(--line); border-top: 4px solid var(--teal); border-radius: 12px; }
.nisa-start h2 { margin: 0; font-size: 1.2rem; }
.nisa-start ol { padding-left: 1.4em; margin: 18px 0 24px; }
.nisa-start li { margin: 8px 0; }
.nisa-start .button { gap: 16px; }
.nisa-toc { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1px; overflow: hidden; background: var(--line); border: 1px solid var(--line); border-radius: 12px; margin-bottom: 28px; }
.nisa-toc a { display: flex; align-items: center; gap: 12px; padding: 17px 20px; background: var(--surface); font-size: .9rem; font-weight: 700; }
.nisa-toc a:hover { background: var(--paper); }
.nisa-toc span { color: var(--muted); font-size: .75rem; }
.nisa-section { margin-top: 24px; padding: 34px 38px; border: 1px solid var(--line); border-radius: 14px; background: var(--surface); scroll-margin-top: 100px; }
.nisa-section h2 { margin: 0 0 22px; font-size: clamp(1.35rem, 2.5vw, 1.8rem); line-height: 1.5; }
.nisa-section h3 { margin: 0 0 12px; font-size: 1.1rem; line-height: 1.6; }
.nisa-section p { line-height: 1.95; }
.nisa-section p:last-child { margin-bottom: 0; }
.nisa-concepts { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; margin: 26px 0; }
.nisa-concepts article { padding: 20px; border-top: 2px solid var(--teal); background: var(--paper); border-radius: 0 0 8px 8px; }
.nisa-concepts p { margin-bottom: 0; font-size: .9rem; }
.nisa-kicker { display: block; margin-bottom: 8px; color: var(--teal); font-size: .76rem; font-weight: 800; }
.nisa-note { padding: 18px 20px; margin: 24px 0 0; border-left: 3px solid var(--orange); background: var(--paper); font-size: .9rem; }
.nisa-note p { margin: 8px 0 0; }
.nisa-two-column { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 30px; }
.nisa-table-wrap { overflow-x: auto; margin-top: 24px; }
.nisa-table { width: 100%; min-width: 580px; border-collapse: collapse; font-size: .9rem; }
.nisa-table caption { padding-bottom: 12px; text-align: left; color: var(--muted); font-size: .8rem; }
.nisa-table th, .nisa-table td { padding: 16px; text-align: left; vertical-align: top; border-bottom: 1px solid var(--line); }
.nisa-table thead th { background: var(--paper); color: var(--teal-dark); }
.nisa-table tbody th { width: 25%; }
.nisa-source-link { display: inline-block; margin-top: 20px; text-decoration: underline; text-underline-offset: 4px; font-size: .87rem; }
.nisa-steps { counter-reset: nisa-step; list-style: none; padding: 0; margin: 0; }
.nisa-steps li { position: relative; padding: 22px 0 22px 62px; border-top: 1px solid var(--line); }
.nisa-steps li::before { counter-increment: nisa-step; content: counter(nisa-step, decimal-leading-zero); position: absolute; left: 0; top: 24px; display: grid; place-items: center; width: 40px; height: 40px; border: 1px solid var(--line); border-radius: 50%; color: var(--teal); font-size: .85rem; font-weight: 800; }
.nisa-steps h3 { margin-bottom: 6px; }
.nisa-steps p { margin: 0; font-size: .94rem; }
.nisa-update { margin-top: 24px; padding: 24px; border: 1px solid var(--line); border-radius: 10px; }
.nisa-update-heading { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 16px; margin-bottom: 18px; color: var(--muted); font-size: .8rem; }
.nisa-status { padding: 4px 10px; color: var(--teal-dark); border: 1px solid var(--teal); border-radius: 4px; font-weight: 800; }
.nisa-update ul { padding-left: 1.3em; }
.nisa-update li { margin: 10px 0; }
.nisa-faq { padding: 18px 0; border-top: 1px solid var(--line); }
.nisa-faq summary { cursor: pointer; color: var(--teal-dark); font-weight: 700; padding: 4px 0; }
.nisa-faq p { margin: 12px 0 0; padding-left: 18px; color: var(--muted); }
.nisa-sources { font-size: .9rem; }
.nisa-sources li { margin: 10px 0; }
.nisa-next { margin-top: 24px; padding: 24px; background: var(--paper); border: 1px solid var(--line); border-radius: 10px; }
.nisa-next .button { display: inline-flex; gap: 12px; max-width: 100%; white-space: normal; }
.nisa-checklist { padding-left: 1.4em; }
.nisa-checklist li { margin: 14px 0; line-height: 1.8; }
.nisa-company-table { min-width: 960px; }
.nisa-company-table tbody th { width: 12%; }
.nisa-company-table td { width: 22%; }
.nisa-brokers { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; margin-top: 28px; }
.nisa-broker { display: flex; flex-direction: column; min-width: 0; padding: 22px; border: 1px solid var(--line); border-top: 3px solid var(--teal); border-radius: 10px; scroll-margin-top: 100px; }
.nisa-broker p { font-size: .9rem; }
.nisa-broker-sources { padding-left: 1.2em; margin: 0 0 24px; font-size: .82rem; line-height: 1.8; }
.nisa-broker-sources a { text-decoration: underline; text-underline-offset: 3px; }
.nisa-broker .button { margin-top: auto; gap: 8px; max-width: 100%; white-space: normal; font-size: .85rem; }
.nisa-page a:focus-visible, .nisa-page summary:focus-visible, .nisa-table-wrap:focus-visible { outline: 3px solid var(--teal); outline-offset: 4px; }

@media (max-width: 800px) {
    .nisa-hero { grid-template-columns: 1fr; gap: 24px; padding-top: 22px; }
    .nisa-toc { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .nisa-concepts { grid-template-columns: 1fr; }
    .nisa-brokers { grid-template-columns: 1fr; }
    .nisa-section { padding: 26px; }
}

@media (max-width: 520px) {
    .nisa-start, .nisa-section { padding: 22px 18px; }
    .nisa-two-column { grid-template-columns: 1fr; gap: 18px; }
    .nisa-toc a { padding: 14px 12px; gap: 8px; font-size: .8rem; }
    .nisa-update { padding: 18px 14px; }
    .nisa-steps li { padding-left: 50px; }
    .nisa-steps li::before { width: 34px; height: 34px; }
    .nisa-sources { overflow-wrap: anywhere; }
}
/* 見出しを言葉のまとまりで折り返す。例：「急がない／NISA入門。」 */
.nisa-hero-title span { display: inline-block; }