/* Clear Sky: white, light blue, generous spacing and a split hero. */
:root {
  color-scheme: light;
  --paper: #fff;
  --ink: #183f53;
  --muted: #587382;
  --accent: #087da9;
  --sky: #dff5ff;
  --sky-light: #f3fbff;
  --line: #dcecf3;
  font-family: Inter, 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', 'Yu Gothic', Meiryo, sans-serif;
  font-size: 16px;
  background: var(--paper);
  color: var(--ink);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 28px; }
body { margin: 0; -webkit-font-smoothing: antialiased; }
h1,h2,h3,h4,p,figure { margin: 0; }
a { color: inherit; text-decoration: none; touch-action: manipulation; }
a,summary { -webkit-tap-highlight-color: transparent; }
summary { font: inherit; }
img,svg { display: block; }
svg { width: 20px; height: 20px; flex-shrink: 0; }
a:focus-visible,summary:focus-visible { outline: 3px solid var(--accent); outline-offset: 6px; border-radius: 4px; }
.shell { max-width: 1280px; width: calc(100% - 112px); margin-inline: auto; }
.skip-link { position: fixed; left: 16px; top: -100px; z-index: 10; background: var(--ink); color: #fff; padding: 14px 20px; border-radius: 6px; }
.skip-link:focus { top: 14px; }
.site-header { display: flex; align-items: center; justify-content: space-between; min-height: 104px; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 12px; font-size: 1.44rem; font-weight: 750; letter-spacing: -.7px; white-space: nowrap; }
.brand-mark { background: var(--ink); color: white; width: 38px; height: 38px; display: inline-flex; align-items: center; justify-content: center; border-radius: 10px; letter-spacing: -2px; font-size: 26px; line-height: 1; padding-bottom: 4px; padding-right: 3px; }
.brand-mark>span { color: #8bd6f9; }
.brand-dot { color: #54bde6; }
.site-header nav { display: flex; align-items: center; gap: 33px; font-size: .875rem; font-weight: 500; }
.site-header nav>a { padding-block: 10px; }
.site-header nav>a:hover,.text-link:hover { color: var(--accent); }
.site-header .nav-cta { display: inline-flex; gap: 22px; align-items: center; border: 1px solid var(--line); padding: 12px 18px; border-radius: 6px; }
.eyebrow { font-size: .75rem; font-weight: 650; letter-spacing: .16em; line-height: 1.8; color: var(--accent); }
.hero { display: grid; grid-template-columns: 1fr 1.13fr; gap: 50px; align-items: center; padding-block: 67px 75px; }
.hero-copy { min-width: 0; }
.hero-copy h1 { font-size: clamp(2.375rem,4.35vw,3.8125rem); letter-spacing: .025em; font-weight: 700; line-height: 1.48; margin-top: 23px; }
.hero-copy h1>span { color: #408bad; }
.hero-description { font-size: 1rem; line-height: 2.05; color: var(--muted); margin-top: 25px; }
.button { display: inline-flex; align-items: center; justify-content: space-between; gap: 43px; padding: 17px 25px; border-radius: 6px; font-size: .875rem; font-weight: 600; line-height: 1.6; transition: background .18s,transform .18s; }
.button.primary { background: var(--accent); color: white; margin-top: 29px; box-shadow: 0 5px 15px #157fa614; }
.button.primary:hover { background: #07678d; transform: translateY(-2px); }
.hero-byline { display: flex; align-items: center; gap: 10px; font-size: .75rem; color: #647f8c; line-height: 1.8; margin-top: 28px; }
.byline-rule { display: block; width: 22px; height: 1px; background: #a5c7d7; }
.hero-product { padding: 26px 25px 23px; background: linear-gradient(125deg,#eefaff,#d9f2ff); border-radius: 22px; border: 1px solid #e1f3fc; min-width: 0; }
.product-kicker { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 7px 15px; color: #4f7488; font-size: .75rem; letter-spacing: .08em; font-weight: 600; line-height: 1.8; padding-bottom: 19px; }
.conversion-card { background: #fff; border: 1px solid #d7eaf4; border-radius: 12px; box-shadow: 0 16px 35px #2057760b; overflow: hidden; }
.conversion-header { display: flex; align-items: center; gap: 13px; padding: 23px 21px; border-bottom: 1px solid var(--line); }
.conversion-header img { width: 42px; height: 42px; border-radius: 10px; }
.conversion-header h2 { font-size: 1.125rem; letter-spacing: -.45px; line-height: 1.6; overflow-wrap: anywhere; }
.conversion-header p { font-size: .875rem; line-height: 1.8; color: var(--muted); margin-top: 3px; }
.file-flow { display: grid; grid-template-columns: minmax(0,1fr) 25px minmax(0,1fr); align-items: center; gap: 9px; padding: 29px 20px; }
.file-panel { background: #f7fafc; border: 1px solid #e5edf2; border-radius: 8px; min-width: 0; padding: 16px 13px; }
.file-panel.output { background: #effaff; border-color: #ccebf9; }
.file-label { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 6px; color: #577887; font-size: .75rem; letter-spacing: .03em; line-height: 1.8; }
.file-label>span { background: #e7f1f6; border-radius: 3px; padding: 2px 5px; font-size: .75rem; letter-spacing: 0; }
.output .file-label>span { background: #d4f1ff; color: #096f97; }
.archive-name { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; font-size: .875rem; font-weight: 650; line-height: 1.8; margin-top: 18px; }
.archive-name svg { width: 18px; height: 18px; color: #7295a7; }
.output .archive-name svg { color: #2587b0; }
.file-panel ul { padding: 13px 0 0; margin: 13px 0 0; border-top: 1px solid #dce9ef; list-style: none; display: flex; flex-direction: column; gap: 12px; }
.file-panel li { font-family: Consolas,'SFMono-Regular',monospace; font-size: .75rem; line-height: 1.8; color: #516e7f; overflow-wrap: anywhere; }
.file-panel li>span { color: #87a7b7; margin-right: 3px; }
.output li { color: #236988; }
.output li>span { color: #52a4c9; }
.flow-arrow { color: #268cb5; font-size: 1.375rem; text-align: center; }
.conversion-footer { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px 15px; border-top: 1px solid var(--line); padding: 17px 20px; font-size: .75rem; color: var(--muted); }
.conversion-footer>span:first-child { display: flex; align-items: center; gap: 7px; }
.conversion-footer svg { height: 16px; width: 16px; color: #438cac; }
.conversion-footer>span:last-child { font-family: Consolas,'SFMono-Regular',monospace; color: #397d9b; }
.hero-product figcaption { font-size: .75rem; color: #50768b; line-height: 1.9; display: flex; flex-wrap: wrap; justify-content: space-between; gap: 3px 12px; margin-top: 19px; }
.apps-section { padding-block: 33px 68px; }
.section-heading { display: flex; justify-content: space-between; align-items: end; gap: 25px; margin-bottom: 29px; }
.section-heading .eyebrow { color: #5f7d8d; }
.section-heading h2 { font-size: 1.8125rem; line-height: 1.6; font-weight: 650; letter-spacing: .035em; margin-top: 8px; }
.section-heading>p { font-size: .875rem; color: var(--muted); line-height: 1.8; margin-bottom: 4px; }
.app-feature { display: grid; grid-template-columns: 1.1fr 1fr; border: 1px solid var(--line); border-radius: 16px; overflow: hidden; }
.app-overview { padding: 35px 37px 37px; background: var(--sky-light); min-width: 0; }
.app-title-row { display: flex; align-items: center; gap: 17px; }
.app-title-row img { height: 58px; width: 58px; border-radius: 14px; }
.app-category { font-size: .75rem; letter-spacing: .08em; color: #55798c; line-height: 1.8; }
.app-title-row h3 { font-size: 1.5rem; letter-spacing: -.6px; line-height: 1.5; margin-top: 3px; overflow-wrap: anywhere; }
.app-summary { font-size: 1.6875rem; letter-spacing: .015em; line-height: 1.7; margin-top: 25px; font-weight: 600; }
.app-description { color: var(--muted); font-size: 1rem; line-height: 1.95; margin-top: 17px; max-width: 475px; }
.tags { display: flex; flex-wrap: wrap; gap: 7px; padding: 0; margin: 23px 0 0; list-style: none; }
.tags li { background: #fff; border: 1px solid #d8eaf3; border-radius: 5px; color: #557689; padding: 6px 9px; font-size: .75rem; line-height: 1.6; }
.app-specs { padding: 35px 35px 25px; display: flex; flex-direction: column; justify-content: space-between; gap: 25px; min-width: 0; }
.feature-list { list-style: none; padding: 0; margin: 0; }
.feature-list li { display: flex; gap: 17px; align-items: start; padding-bottom: 22px; }
.feature-list li:last-child { padding-bottom: 0; }
.feature-number { font-size: .75rem; color: #52798d; border: 1px solid #ddecf4; background: #f6fcff; padding: 6px 8px; line-height: 1.4; border-radius: 7px; flex-shrink: 0; margin-top: 2px; }
.feature-list h4 { font-size: 1rem; font-weight: 650; line-height: 1.7; }
.feature-list p { font-size: .875rem; color: var(--muted); line-height: 1.85; margin-top: 3px; }
.release-note { border-top: 1px solid var(--line); padding-top: 20px; display: flex; flex-wrap: wrap; align-items: start; gap: 14px; }
.release-badge { font-size: .75rem; color: #436b81; padding: 5px 9px; border: 1px solid #dce9f0; border-radius: 4px; line-height: 1.6; white-space: nowrap; background: #f7fbfd; }
.release-note p { font-size: .875rem; color: var(--muted); line-height: 1.9; }
.app-details { grid-column: 1/-1; border-top: 1px solid var(--line); background: #fff; }
.app-details summary { list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 20px; padding: 20px 35px; cursor: pointer; font-size: .875rem; font-weight: 600; line-height: 1.8; }
.app-details summary::-webkit-details-marker { display: none; }
.app-details summary:hover { background: #f7fcff; }
.details-icon { width: 14px; height: 14px; position: relative; flex-shrink: 0; }
.details-icon:before,.details-icon:after { content: ''; position: absolute; width: 14px; height: 1px; top: 6px; left: 0; background: var(--accent); }
.details-icon:after { transform: rotate(90deg); }
.app-details[open] .details-icon:after { transform: none; }
.details-content { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; padding: 15px 35px 35px; }
.details-content h4 { font-size: 1.125rem; font-weight: 650; line-height: 1.7; }
.steps { padding-left: 22px; margin: 22px 0 0; color: var(--accent); }
.steps li { padding-left: 7px; margin-bottom: 20px; }
.steps strong { font-size: 1rem; line-height: 1.8; color: var(--ink); }
.steps p { font-size: .875rem; line-height: 1.9; margin-top: 6px; color: var(--muted); }
.steps li:last-child { margin-bottom: 0; }
.conversion-rules ul { padding-left: 20px; margin: 21px 0 0; color: var(--muted); }
.conversion-rules li { font-size: .875rem; line-height: 1.9; margin-bottom: 11px; padding-left: 3px; }
.quality-note { font-size: .75rem; line-height: 1.9; color: var(--muted); border-top: 1px solid var(--line); padding-top: 13px; margin-top: 17px; }
.about-section { display: grid; grid-template-columns: 1fr 1.05fr; gap: 70px; border-top: 1px solid var(--line); padding-block: 56px 62px; }
.about-section .eyebrow { color: #5f7d8d; }
.about-section h2 { font-size: 1.875rem; line-height: 1.7; font-weight: 600; letter-spacing: .025em; margin-top: 15px; }
.about-copy p { font-size: 1rem; line-height: 2; color: var(--muted); }
.about-copy p+p { margin-top: 18px; }
.text-link { display: inline-flex; gap: 25px; align-items: center; font-size: .875rem; font-weight: 600; border-bottom: 1px solid #b7d4e3; padding-bottom: 9px; margin-top: 26px; line-height: 1.8; }
.site-footer { display: flex; flex-wrap: wrap; gap: 24px; align-items: center; justify-content: space-between; border-top: 1px solid var(--line); padding-block: 27px 32px; }
.footer-brand { font-size: 1.125rem; gap: 9px; }
.footer-brand .brand-mark { width: 29px; height: 29px; font-size: 21px; border-radius: 8px; }
.site-footer>p,.site-footer small { font-size: .75rem; color: #657f8e; }
@media(min-width:1500px) {
  .hero { gap: 75px; padding-block: 85px; }
  .hero-copy h1 { font-size: 4rem; }
  .file-flow { padding: 31px 25px; }
  .file-panel { padding: 20px 16px; }
}
@media(max-width:1050px) {
  .shell { width: calc(100% - 72px); }
  .hero { gap: 28px; padding-block: 45px 60px; grid-template-columns: 1fr 1fr; }
  .hero-copy h1 { font-size: 2.6875rem; }
  .hero-product { padding: 20px 16px; }
  .conversion-header { padding: 18px 15px; gap: 10px; }
  .conversion-header h2 { font-size: 1rem; }
  .conversion-header img { width: 34px; height: 34px; }
  .file-flow { padding: 22px 12px; gap: 6px; grid-template-columns: minmax(0,1fr) 18px minmax(0,1fr); }
  .file-panel { padding: 12px 8px; }
  .archive-name { gap: 4px; }
  .file-panel li>span { display: none; }
  .flow-arrow { font-size: 1.125rem; }
  .conversion-footer { padding: 15px 12px; }
  .conversion-footer>span:last-child { display: none; }
  .hero-product figcaption { display: block; }
  .hero-product figcaption>span { display: block; }
  .app-overview { padding: 29px; }
  .app-specs { padding: 29px 27px 25px; }
  .app-title-row { gap: 13px; }
  .app-title-row h3 { font-size: 1.3125rem; }
  .app-title-row img { width: 50px; height: 50px; }
  .app-summary { font-size: 1.5rem; }
  .release-note { flex-direction: column; gap: 10px; }
  .details-content { gap: 32px; padding-inline: 29px; }
  .about-section { gap: 40px; }
  .about-section h2 { font-size: 1.6875rem; }
  .about-copy .desktop-break { display: none; }
}
@media(max-width:760px) {
  .shell { width: calc(100% - 44px); }
  .site-header { min-height: 84px; gap: 15px; flex-wrap: wrap; padding-block: 15px; }
  .brand { font-size: 1.25rem; gap: 9px; }
  .brand-mark { width: 33px; height: 33px; font-size: 24px; }
  .site-header nav { gap: 21px; font-size: .875rem; }
  .site-header .nav-cta { display: none; }
  .hero { grid-template-columns: 1fr; gap: 36px; padding-block: 36px 42px; }
  .hero-copy h1 { font-size: clamp(2.25rem,7.3vw,3.125rem); line-height: 1.5; margin-top: 20px; }
  .hero-description { line-height: 2; margin-top: 21px; }
  .eyebrow { letter-spacing: .1em; }
  .button.primary { margin-top: 24px; padding: 15px 23px; }
  .hero-byline { margin-top: 20px; }
  .hero-product { max-width: 550px; width: 100%; justify-self: center; padding: 21px 18px 18px; border-radius: 17px; }
  .product-kicker { font-size: .75rem; letter-spacing: .04em; padding-bottom: 17px; }
  .conversion-header { padding: 19px 17px; gap: 12px; }
  .conversion-header img { width: 39px; height: 39px; }
  .conversion-header h2 { font-size: 1.0625rem; }
  .file-flow { grid-template-columns: minmax(0,1fr) 21px minmax(0,1fr); padding: 24px 16px; gap: 8px; }
  .file-panel { padding: 15px 12px; }
  .archive-name { margin-top: 16px; gap: 5px; }
  .conversion-footer { padding: 16px; }
  .hero-product figcaption { display: flex; flex-wrap: wrap; gap: 3px 14px; margin-top: 16px; }
  .apps-section { padding-block: 25px 38px; }
  .section-heading { display: block; margin-bottom: 22px; }
  .section-heading h2 { font-size: 1.625rem; margin-top: 6px; }
  .section-heading>p { margin-top: 8px; }
  .app-feature { grid-template-columns: 1fr; border-radius: 13px; }
  .app-overview { padding: 25px 23px 27px; }
  .app-title-row h3 { font-size: 1.3125rem; }
  .app-title-row img { height: 48px; width: 48px; border-radius: 12px; }
  .app-category { letter-spacing: .03em; }
  .app-summary { font-size: 1.5625rem; margin-top: 25px; }
  .app-description { margin-top: 17px; max-width: none; }
  .tags { margin-top: 21px; }
  .app-specs { padding: 27px 23px; }
  .feature-list li { gap: 14px; padding-bottom: 23px; }
  .release-note { flex-direction: row; gap: 11px; padding-top: 20px; }
  .app-details summary { padding: 19px 23px; }
  .details-content { grid-template-columns: 1fr; gap: 30px; padding: 13px 23px 27px; }
  .about-section { grid-template-columns: 1fr; gap: 24px; padding-block: 37px 40px; }
  .about-section h2 { font-size: 1.625rem; margin-top: 12px; }
  .text-link { margin-top: 22px; }
  .site-footer { display: grid; grid-template-columns: 1fr auto; gap: 16px; padding-block: 24px 28px; }
  .site-footer>p { grid-row: 2; grid-column: 1/-1; }
  .footer-brand { font-size: 1.0625rem; }
  .footer-brand .brand-mark { width: 28px; height: 28px; font-size: 20px; }
}
@media(max-width:380px) {
  .shell { width: calc(100% - 32px); }
  .brand { font-size: 1.125rem; gap: 7px; }
  .site-header nav { gap: 17px; }
  .hero-product { padding: 18px 12px 15px; }
  .file-flow { padding: 20px 10px; gap: 5px; grid-template-columns: minmax(0,1fr) 17px minmax(0,1fr); }
  .file-panel { padding: 12px 8px; }
  .conversion-header { padding: 17px 12px; gap: 9px; }
  .conversion-header h2 { font-size: 1rem; }
  .app-overview,.app-specs { padding-inline: 20px; }
  .app-title-row h3 { font-size: 1.1875rem; }
  .app-summary { font-size: 1.4375rem; }
  .release-note { flex-direction: column; gap: 10px; }
  .site-footer { grid-template-columns: 1fr; }
  .site-footer small { grid-row: 3; }
  .site-footer>p { grid-column: 1; }
}
@media(prefers-reduced-motion:reduce) { html { scroll-behavior: auto; } * { transition: none !important; } }
@media(forced-colors:active) {
  .details-icon:before,.details-icon:after { background: ButtonText; }
  .brand-mark,.button.primary { border: 1px solid ButtonText; }
  .hero-product,.file-panel { border: 1px solid CanvasText; }
}