:root { --ch-deep: #091b30; --ch-ink: #12273b; --ch-paper: #eceeec; --ch-line: rgb(18 39 59 / 20%); }
.ch-case { color: var(--ch-ink); background: var(--ch-paper); }
.ch-case .button, .ch-case .menu-toggle { background: #225da6; border-color: #225da6; color: #fff; }
.ch-shell { width: min(1600px, calc(100% - 96px)); margin-inline: auto; }
.ch-wide { width: min(1800px, calc(100% - 48px)); margin-inline: auto; }
.ch-kicker { margin: 0; font-size: 12px; line-height: 1.5; letter-spacing: .09em; text-transform: uppercase; }
.ch-hero { background: var(--ch-deep); color: #f3f5f7; }
.ch-hero__heading { padding-block: clamp(55px, 6vw, 100px); display: grid; grid-template-columns: 2fr 1fr; gap: 50px; align-items: end; }
.ch-hero h1 { margin: 25px 0 0; font: 400 clamp(72px, 8.8vw, 150px)/1.03 var(--display); letter-spacing: -.035em; }
.ch-hero__lead { margin: 0 0 5px; max-width: 390px; font-size: clamp(20px, 1.7vw, 29px); line-height: 1.5; color: #c0cedd; }
.ch-photo { margin: 0; min-width: 0; }
.ch-photo > a { display: block; }
.ch-photo img { width: 100%; height: auto; display: block; object-fit: contain; }
.ch-photo figcaption { padding-top: 14px; font-size: 12px; line-height: 1.5; letter-spacing: .03em; }
.ch-hero__photo figcaption { padding: 18px 24px; display: flex; justify-content: space-between; gap: 24px; }
.ch-section { padding-block: clamp(72px, 8vw, 140px); }
.ch-section h2 { margin: 24px 0 0; font: 400 clamp(56px, 6vw, 104px)/1.06 var(--display); letter-spacing: -.035em; }
.ch-split { display: grid; grid-template-columns: 1.25fr 1fr; gap: clamp(35px, 6vw, 100px); }
.ch-split > *, .ch-hero__heading > * { min-width: 0; }
.ch-copy { padding-top: 40px; }
.ch-copy p { margin: 0; max-width: 620px; font-size: clamp(18px, 1.45vw, 23px); line-height: 1.55; }
.ch-copy p + p { margin-top: 1em; }
.ch-case section[id] { scroll-margin-top: calc(var(--header-h) + 24px); }
.ch-index { position: static; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-bottom: 1px solid var(--ch-line); }
.ch-index a { display: flex; align-items: center; justify-content: space-between; padding: 22px 30px; gap: 16px; border-right: 1px solid var(--ch-line); text-transform: uppercase; text-decoration: none; font-size: 14px; letter-spacing: .04em; }
.ch-index a:last-child { border-right: 0; }
.ch-index a span { color: #476483; font-size: 12px; }
.ch-index a:is(:hover, :focus-visible) { background: #dce3e9; }
.ch-water { background: #dce3e9; }
.ch-feature { margin-top: clamp(45px, 6vw, 90px); }
.ch-pair { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; margin-top: 42px; }
.ch-stage { background: var(--ch-deep); color: #f3f5f7; }
.ch-stage .ch-copy { color: #c0cedd; }
.ch-capacity { display: flex; align-items: baseline; gap: 24px; padding-block: 36px; margin-block: clamp(45px, 5vw, 85px); border-block: 1px solid rgb(255 255 255 / 23%); }
.ch-capacity > span { font-size: 20px; }
.ch-capacity strong { font: 400 clamp(110px, 12vw, 190px)/1 var(--display); letter-spacing: -.035em; }
.ch-capacity p { margin: 0 0 0 auto; font-size: clamp(18px, 1.6vw, 26px); line-height: 1.5; }
.ch-tabs { display: grid; grid-template-columns: 1fr 1fr; border: 1px solid rgb(255 255 255 / 25%); }
.ch-tabs button { border: 0; border-radius: 0; padding: 23px 26px; text-align: left; background: transparent; color: #d3deea; font-size: 16px; cursor: pointer; }
.ch-tabs button + button { border-left: 1px solid rgb(255 255 255 / 25%); }
.ch-tabs button[aria-selected="true"] { background: #e3eaf2; color: #12273b; }
.ch-tabs button:hover:not([aria-selected="true"]) { background: #234769; }
.ch-tabs button:focus-visible { outline: 2px solid #efc37d; outline-offset: -5px; }
.ch-panel[hidden] { display: none; }
.ch-panel figcaption { padding: 18px 0 0; }
.no-js .ch-tabs { display: none; }
.no-js .ch-panel + .ch-panel { margin-top: 36px; }
.ch-drawings { background: #f5f5f2; }
.ch-sheet { width: min(1520px, calc(100% - 48px)); margin: clamp(45px, 6vw, 90px) auto 0; background: #fff; }
.ch-sheet figcaption { display: flex; justify-content: space-between; gap: 24px; padding: 20px 24px; border-top: 1px solid var(--ch-line); font-size: 14px; }
.ch-sheet figcaption a, .ch-end a { text-underline-offset: 5px; }
.ch-end { display: flex; justify-content: end; padding-top: 36px; font-size: 16px; }
.ch-contact { background: #070b11; }
.ch-contact .contact__main h2 { margin-top: 25px; font: 400 clamp(60px, 6.9vw, 114px)/1.06 var(--display); letter-spacing: -.035em; color: #d3deea; }
.ch-contact .ch-kicker { font-size: 12px; }
@media (max-width: 1050px) { .ch-shell { width: calc(100% - 48px); } .ch-hero__heading { gap: 30px; } .ch-split { gap: 35px; } }
@media (max-width: 760px) { .ch-hero__heading, .ch-split { grid-template-columns: 1fr; gap: 28px; } .ch-hero h1 { font-size: clamp(58px, 11.8vw, 90px); } .ch-copy { padding-top: 0; } .ch-section { padding-block: 64px; } }
@media (max-width: 450px) { .ch-shell { width: calc(100% - 32px); } .ch-hero h1 { font-size: clamp(48px, 12vw, 58px); } .ch-section h2 { font-size: 48px; } .ch-hero__photo figcaption { flex-direction: column; gap: 4px; padding: 14px 16px; } }
@media (max-width: 760px) {
  .ch-index { grid-template-columns: 1fr 1fr; }
  .ch-index a { padding: 18px 24px; }
  .ch-index a:nth-child(2) { border-right: 0; }
  .ch-index a:nth-child(-n+2) { border-bottom: 1px solid var(--ch-line); }
  .ch-pair { grid-template-columns: 1fr; gap: 32px; }
  .ch-capacity { flex-wrap: wrap; gap: 16px; }
  .ch-capacity p { flex-basis: 100%; margin: 0; }
}
@media (max-width: 450px) {
  .ch-wide, .ch-sheet { width: calc(100% - 32px); }
  .ch-index a { padding: 18px 16px; }
  .ch-tabs button { padding: 18px 16px; font-size: 14px; }
  .ch-sheet figcaption { flex-direction: column; gap: 12px; padding: 16px; }
}
@media (prefers-reduced-motion: reduce) { .ch-case * { scroll-behavior: auto !important; animation: none !important; transition: none !important; } }
@media print { .site-header, .mobile-menu, .ch-index, .ch-tabs, .contact { display: none !important; } .ch-panel[hidden] { display: block; } .ch-case { padding-top: 0; } }