/* Aethera shared case shell. Project evidence, palettes and body sections remain intact. */
@font-face{font-family:'Instrument Serif';src:url('/fonts/InstrumentSerif-Regular.ttf') format('truetype');font-style:normal;font-weight:400;font-display:swap}
@font-face{font-family:Inter;src:url('/fonts/Inter-Variable.ttf') format('truetype');font-style:normal;font-weight:100 900;font-display:swap}
.t4c-case{--shell:min(1280px,calc(100% - 144px));font-family:Inter,'Noto Sans SC','Microsoft YaHei',sans-serif}
.t4c-case .aethera-case-header{position:sticky;top:0;height:88px;padding:0 max(72px,calc((100vw - 1280px)/2));background:var(--case-background);color:inherit;border-bottom:1px solid var(--line)}
.t4c-case.case-light .aethera-case-header{background:var(--paper);color:var(--ink)}
.t4c-case .aethera-case-brand{display:inline-flex;align-items:center;min-height:44px;font:400 34px/1 'Instrument Serif',serif;letter-spacing:-.025em;white-space:nowrap}
.t4c-case .aethera-case-header .nav-links{font-size:14px;gap:32px}
.t4c-case .aethera-case-header .nav-links a{display:inline-flex;align-items:center;min-height:44px;padding:0;gap:8px;border:0;border-radius:0;background:transparent;color:inherit;touch-action:manipulation}
.t4c-case .aethera-case-header .nav-links a:hover{text-decoration:underline;text-underline-offset:6px}
.t4c-case .aethera-case-header svg,.t4c-case .aethera-case-footer svg{width:20px;height:20px;flex:none}
.t4c-case .aethera-work-return{border-bottom:1px solid currentColor!important}
.t4c-case .case-hero{padding-top:60px;padding-bottom:42px}
.t4c-case .case-heading{grid-template-columns:1.15fr 1fr;gap:64px}
.t4c-case .case-hero h1{font-family:'Instrument Serif',serif;font-size:clamp(64px,6.2vw,92px);line-height:1.02;font-weight:400;letter-spacing:-.025em;text-wrap:balance}
.t4c-case .case-hero h1>span{display:block;margin-top:14px;font:400 27px/1.4 Inter,'Noto Sans SC',sans-serif;letter-spacing:-.02em}
.t4c-case .case-kicker{margin-top:18px}
.t4c-case .case-statement{font-weight:400;max-width:28ch}
.t4c-case .case-intro{padding-top:6px}
.t4c-case .site-footer.aethera-case-footer{width:100%;margin:0;padding:32px max(72px,calc((100vw - 1280px)/2));display:grid;grid-template-columns:1fr auto auto;gap:20px 40px;background:#080a0c;color:#f5f5f0;border-color:#51575d;font-size:13px}
.t4c-case .aethera-case-footer a{display:inline-flex;align-items:center;gap:12px;min-height:44px}
.t4c-case .aethera-case-footer span{color:#c3c8ce;font-size:12px}
.t4c-case .aethera-case-footer span:last-child{grid-column:3;text-align:right}
.t4c-case :is(.aethera-case-header,.aethera-case-footer) :is(a,button):focus-visible{outline:2px solid currentColor;outline-offset:5px}
@media(max-width:1100px){
 .t4c-case{--shell:calc(100% - 80px)}
 .t4c-case .aethera-case-header{padding-inline:40px}
 .t4c-case .case-heading{gap:36px}
 .t4c-case .site-footer.aethera-case-footer{padding-inline:40px;gap:20px}
}
@media(max-width:767px){
 .aethera-case-document{scroll-padding-top:140px}
 .t4c-case{--shell:calc(100% - 48px)}
 .t4c-case .aethera-case-header{height:auto;display:grid;gap:8px;padding:calc(14px + env(safe-area-inset-top)) max(24px,env(safe-area-inset-right)) 8px max(24px,env(safe-area-inset-left))}
 .t4c-case .aethera-case-brand{font-size:32px}
 .t4c-case .aethera-case-header .nav-links{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:13px}
 .t4c-case .aethera-case-header .nav-links svg{width:17px;height:17px}
 .t4c-case .case-hero{padding-top:32px;padding-bottom:24px}
 .t4c-case .case-hero h1{font-size:52px;line-height:1.05}
 .t4c-case .case-hero h1>span{font-size:22px;margin-top:10px}
 .t4c-case .case-heading{display:block}
 .t4c-case .case-statement{font-size:20px;line-height:1.5;max-width:none}
 .t4c-case .case-intro{padding-top:0}
 .t4c-case .site-footer.aethera-case-footer{padding:28px 24px calc(24px + env(safe-area-inset-bottom));grid-template-columns:1fr;gap:14px}
 .t4c-case .aethera-case-footer span:last-child{grid-column:auto;text-align:left}
}