/* Phase 4C: Digital Tool Archive */
:root {
  --tool-bg: #030911;
  --tool-surface: #07111d;
  --tool-line: rgba(205, 216, 228, 0.16);
  --tool-text: #ece9e1;
  --tool-muted: #8794a5;
  --tool-gold: #b69358;
  --tool-serif: "Shippori Mincho", "Yu Mincho", serif;
  --tool-sans: "Noto Sans JP", sans-serif;
}

html { background: var(--tool-bg); }
body.tool-archive-page { min-width: 320px; overflow-x: hidden; background: var(--tool-bg); color: var(--tool-text); font-family: var(--tool-sans); }
.tool-archive-page main { position: relative; overflow: hidden; }
.tool-archive-page a:focus-visible,
.tool-archive-page button:focus-visible { outline: 1px solid var(--tool-gold); outline-offset: 5px; }
.skip-link { position: fixed; top: -100px; left: 16px; z-index: 1000; padding: 12px 16px; background: var(--tool-text); color: var(--tool-bg); }
.skip-link:focus { top: 16px; }

/* Archive opening */
.tool-intro { position: relative; min-height: 100vh; padding: 112px clamp(28px, 4.2vw, 72px) 72px; border-bottom: 1px solid var(--tool-line); }
.tool-intro__backdrop { position: absolute; top: 62px; left: -10px; margin: 0; color: rgba(226, 233, 241, 0.035); font-family: Georgia, serif; font-size: clamp(8rem, 16vw, 15rem); line-height: 1; letter-spacing: 0; pointer-events: none; }
.tool-intro__header { position: relative; z-index: 1; display: flex; justify-content: space-between; gap: 32px; padding-bottom: 22px; border-bottom: 1px solid var(--tool-line); color: var(--tool-gold); font-size: .68rem; letter-spacing: .28em; }
.tool-intro__header div { display: flex; gap: 24px; color: var(--tool-muted); }
.tool-intro__layout { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(390px, .85fr); gap: clamp(42px, 5vw, 78px); align-items: center; max-width: 1380px; min-height: calc(100vh - 210px); margin: 34px auto 0; }
.tool-intro__visual { min-width: 0; }
.tool-intro__visual img { display: block; width: 100%; height: auto; border: 1px solid rgba(195, 212, 228, .2); box-shadow: 0 28px 80px rgba(0,0,0,.4); }
.tool-intro__visual > p { display: flex; justify-content: space-between; margin: 13px 0 0; color: var(--tool-muted); font-size: .62rem; letter-spacing: .22em; }
.tool-kicker { margin: 0 0 19px; color: var(--tool-gold); font-size: .67rem; letter-spacing: .28em; }
.tool-intro__copy h1 { margin: 0; font-family: var(--tool-serif); font-size: clamp(3rem, 4.5vw, 4.7rem); font-weight: 500; line-height: 1.22; letter-spacing: .05em; }
.tool-intro__lead { margin: 30px 0 0; font-family: var(--tool-serif); font-size: clamp(1rem, 1.35vw, 1.22rem); line-height: 2; }
.tool-intro__description { margin: 17px 0 0; color: var(--tool-muted); font-size: .85rem; line-height: 2; }
.tool-meta { display: grid; grid-template-columns: repeat(2, 1fr); margin: 30px 0 0; border-top: 1px solid var(--tool-line); }
.tool-meta div { padding: 13px 12px 13px 0; border-bottom: 1px solid var(--tool-line); }
.tool-meta dt { color: var(--tool-muted); font-size: .57rem; letter-spacing: .2em; }
.tool-meta dd { margin: 6px 0 0; font-family: var(--tool-serif); font-size: .88rem; }
.archive-link { display: inline-flex; min-height: 44px; align-items: center; gap: 28px; margin-top: 28px; padding: 0 0 6px; border-bottom: 1px solid var(--tool-gold); color: var(--tool-text); font-family: var(--tool-serif); font-size: .88rem; text-decoration: none; transition: color .2s ease, gap .2s ease; }
.archive-link:hover { color: #fff; gap: 34px; }
.archive-link span { color: var(--tool-gold); }
.tool-intro__file { max-width: 100%; margin: 10px 0 0; color: var(--tool-muted); font-size: .6rem; overflow-wrap: anywhere; }

/* Shared archive sections */
.archive-section { width: min(1320px, calc(100% - clamp(40px, 8vw, 144px))); margin: 0 auto; padding: clamp(88px, 10vw, 150px) 0; border-bottom: 1px solid var(--tool-line); }
.archive-section__heading { display: grid; grid-template-columns: minmax(180px, .34fr) minmax(0, 1fr); gap: 40px; align-items: baseline; }
.archive-section__heading > p { margin: 0; color: var(--tool-gold); font-size: .66rem; letter-spacing: .26em; }
.archive-section__heading h2 { margin: 0; font-family: var(--tool-serif); font-size: clamp(2rem, 4vw, 4.2rem); font-weight: 500; letter-spacing: .04em; }

/* Overview */
.archive-overview__body { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(40px, 7vw, 100px); margin: 68px 0 0 clamp(220px, 25vw, 350px); }
.archive-overview__body > p { margin: 0; color: #c8ced4; font-family: var(--tool-serif); font-size: 1rem; line-height: 2.25; }
.archive-overview__body aside { grid-column: 1 / -1; display: grid; grid-template-columns: 170px 1fr; gap: 36px; padding: 25px 0; border-top: 1px solid rgba(182,147,88,.45); border-bottom: 1px solid var(--tool-line); }
.archive-overview__body aside strong { color: var(--tool-gold); font-size: .61rem; letter-spacing: .22em; }
.archive-overview__body aside p { margin: 0; color: var(--tool-muted); font-size: .78rem; line-height: 1.9; }

/* Interface gallery */
.interface-archive__lead { display: flex; justify-content: space-between; gap: 40px; margin: 34px 0 52px calc(34% + 40px); color: var(--tool-muted); font-size: .75rem; line-height: 1.8; }
.interface-archive__lead p { max-width: 580px; margin: 0; }
.interface-archive__lead span { color: var(--tool-gold); font-size: .6rem; letter-spacing: .2em; white-space: nowrap; }
.interface-archive__gallery { display: grid; grid-template-columns: 1.2fr .8fr; gap: clamp(24px, 3vw, 44px); }
.interface-shot { min-width: 0; margin: 0; }
.interface-shot--wide { grid-row: span 2; }
.interface-shot img { display: block; width: 100%; height: auto; border: 1px solid var(--tool-line); }
.interface-shot figcaption { display: grid; grid-template-columns: 32px 1fr auto; gap: 14px; align-items: baseline; padding: 13px 0 0; color: var(--tool-muted); font-size: .68rem; }
.interface-shot figcaption span { color: var(--tool-gold); }
.interface-shot figcaption strong { color: var(--tool-text); font-family: var(--tool-serif); font-size: .9rem; font-weight: 500; }
.interface-shot figcaption small { color: var(--tool-muted); }

/* Function index */
.function-index ol { margin: 58px 0 0 clamp(220px, 25vw, 350px); padding: 0; list-style: none; border-top: 1px solid var(--tool-line); }
.function-index li { display: grid; grid-template-columns: 56px minmax(210px, .65fr) minmax(0, 1fr); gap: 30px; align-items: baseline; padding: 25px 0; border-bottom: 1px solid var(--tool-line); }
.function-index li > span { color: var(--tool-gold); font-size: .68rem; }
.function-index h3 { margin: 0; font-size: .7rem; font-weight: 500; letter-spacing: .18em; }
.function-index li p { margin: 0; color: var(--tool-muted); font-size: .78rem; line-height: 1.85; }

/* System record */
.system-record__layout { display: grid; grid-template-columns: repeat(2, 1fr); gap: clamp(48px, 8vw, 120px); margin: 64px 0 0 clamp(220px, 25vw, 350px); }
.record-label { margin: 0 0 24px; color: var(--tool-gold); font-size: .62rem; letter-spacing: .22em; }
.system-record dl { margin: 0; border-top: 1px solid var(--tool-line); }
.system-record dl div { display: grid; grid-template-columns: 120px 1fr; gap: 20px; padding: 17px 0; border-bottom: 1px solid var(--tool-line); }
.system-record dt { color: var(--tool-muted); font-size: .62rem; letter-spacing: .15em; }
.system-record dd { margin: 0; font-family: var(--tool-serif); font-size: .9rem; }
.system-record ul { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--tool-line); }
.system-record li { padding: 12px 0; border-bottom: 1px solid var(--tool-line); color: #b6bec7; font-size: .74rem; line-height: 1.6; }
.system-record__notice { margin: 54px 0 0 clamp(220px, 25vw, 350px); padding-left: 19px; border-left: 1px solid var(--tool-gold); color: var(--tool-muted); font-size: .72rem; line-height: 1.9; }

/* Downloads */
.download-record { border-bottom: 0; }
.download-record__layout { display: grid; grid-template-columns: .9fr 1.1fr; gap: clamp(54px, 9vw, 140px); margin: 64px 0 0 clamp(220px, 25vw, 350px); }
.download-record__release > p:first-child { margin: 0; color: var(--tool-gold); font-size: .62rem; letter-spacing: .22em; }
.download-record__release h3 { margin: 23px 0 0; font-family: var(--tool-serif); font-size: clamp(1.7rem, 2.6vw, 2.8rem); font-weight: 500; line-height: 1.5; }
.download-record__release h3 span { display: block; color: var(--tool-gold); font-family: var(--tool-sans); font-size: .72rem; letter-spacing: .18em; }
.download-record__release > p:nth-of-type(2) { color: var(--tool-muted); font-size: .72rem; line-height: 1.9; }
.document-index { border-top: 1px solid var(--tool-line); }
.document-index a { display: grid; grid-template-columns: 34px 1fr auto; gap: 14px; min-height: 76px; align-items: center; border-bottom: 1px solid var(--tool-line); color: var(--tool-text); text-decoration: none; }
.document-index a > span { color: var(--tool-gold); font-size: .64rem; }
.document-index strong { display: block; font-size: .69rem; font-weight: 500; letter-spacing: .18em; }
.document-index small { grid-column: 2; margin-top: -22px; color: var(--tool-muted); font-size: .62rem; }
.document-index i { grid-column: 3; grid-row: 1 / span 2; color: var(--tool-gold); font-style: normal; }
.download-record__hash { display: grid; grid-template-columns: 120px minmax(0, 1fr); gap: 20px; margin: 54px 0 0 clamp(220px, 25vw, 350px); padding-top: 18px; border-top: 1px solid var(--tool-line); color: var(--tool-muted); font-size: .61rem; }
.download-record__hash span { color: var(--tool-gold); letter-spacing: .15em; }
.download-record__hash code { overflow-wrap: anywhere; }

@media (max-width: 1040px) {
  .tool-intro { min-height: auto; }
  .tool-intro__layout { grid-template-columns: 1fr; min-height: auto; }
  .tool-intro__copy { max-width: 720px; }
  .archive-overview__body, .function-index ol, .system-record__layout, .system-record__notice, .download-record__layout, .download-record__hash { margin-left: 0; }
  .interface-archive__lead { margin-left: 0; }
}

@media (max-width: 768px) {
  .tool-intro { padding: 96px 26px 64px; }
  .tool-intro__header { align-items: flex-start; }
  .tool-intro__header div { display: grid; gap: 8px; text-align: right; }
  .tool-intro__layout { gap: 38px; margin-top: 28px; }
  .tool-intro__copy { display: contents; }
  .tool-kicker { grid-row: 1; margin-bottom: -24px; }
  .tool-intro__copy h1 { grid-row: 2; }
  .tool-intro__lead { grid-row: 3; margin-top: -18px; }
  .tool-intro__description { grid-row: 4; margin-top: -22px; }
  .tool-meta { grid-row: 5; margin-top: -10px; }
  .tool-intro__visual { grid-row: 6; }
  .tool-intro__copy .archive-link { grid-row: 7; margin-top: -8px; }
  .tool-intro__file { grid-row: 8; margin-top: -26px; }
  .archive-section { width: calc(100% - 52px); }
  .archive-section__heading { grid-template-columns: 1fr; gap: 20px; }
  .archive-overview__body { grid-template-columns: 1fr; gap: 28px; margin-top: 42px; }
  .archive-overview__body aside { grid-column: auto; grid-template-columns: 1fr; gap: 13px; }
  .interface-archive__lead { margin-top: 28px; }
  .interface-archive__gallery { grid-template-columns: 1fr; }
  .interface-shot--wide { grid-row: auto; }
  .function-index ol, .system-record__layout, .download-record__layout { margin-top: 42px; }
  .function-index li { grid-template-columns: 38px 1fr; gap: 14px; }
  .function-index li p { grid-column: 2; }
  .system-record__layout, .download-record__layout { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .tool-intro { padding-right: 20px; padding-left: 20px; }
  .tool-intro__header { display: grid; gap: 13px; }
  .tool-intro__header div { text-align: left; }
  .tool-intro__backdrop { top: 80px; font-size: 7rem; }
  .tool-intro__copy h1 { font-size: 2.75rem; }
  .archive-section { width: calc(100% - 40px); padding: 76px 0; }
  .interface-archive__lead { display: grid; gap: 14px; }
  .interface-shot figcaption { grid-template-columns: 27px 1fr; }
  .interface-shot figcaption small { grid-column: 2; }
  .function-index li { padding: 22px 0; }
  .system-record dl div { grid-template-columns: 90px 1fr; }
  .download-record__hash { grid-template-columns: 1fr; gap: 9px; }
  .document-index a { min-height: 84px; }
}

@media (prefers-reduced-motion: reduce) {
  .tool-archive-page *, .tool-archive-page *::before, .tool-archive-page *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}