/* Brutalist authenticity: use raw system fonts instead of bundled custom font assets. */
        :root { --red:#ff2200; }
        * { margin:0; padding:0; box-sizing:border-box; }
        body { font-family:Impact,'Arial Narrow',Arial,sans-serif;
               background:#000; color:#fff; overflow:hidden; height:100vh; height:100dvh; }
        #three-canvas { position:fixed; top:0; left:0; width:100%; height:100%; z-index:1; }
        .overlay { height:100vh; height:100dvh; display:flex; flex-direction:column; position:relative; z-index:10; }
        header { padding:14px 24px; background:#000; border-bottom:4px solid #fff;
                 display:flex; align-items:center; justify-content:space-between; }
        .logo { display:flex; align-items:center; gap:16px; }
        .logo-mark { font-size:2.8rem; color:var(--red); line-height:1; }
        .logo-title h1 { font-size:2rem; color:#fff; letter-spacing:0; line-height:1; }
        .logo-title .subtitle { font-size:0.78rem; color:#888; margin-top:3px;
                                 font-family:'Courier New',monospace; }
        .logo-title .subtitle a { color:var(--red); text-decoration:none; }
        .logo-title .subtitle a:hover { text-decoration:underline; }
        .transmit-btn { border:3px solid var(--red); color:var(--red); padding:10px 20px;
                        border-radius:0; text-decoration:none; font-family:Impact; font-size:1.05rem;
                        letter-spacing:2px; transition:all 0.1s; }
        .transmit-btn:hover { background:var(--red); color:#000; }
        a.header-feed-link { color:#aaa; font-family:'Courier New',monospace; font-size:0.78rem; }
        a.header-feed-link:hover { color:var(--red); }
        .nav-hints { background:#111; border-bottom:2px solid #333; color:#888;
                     padding:5px 24px; display:flex; gap:18px; font-family:'Courier New',monospace;
                     font-size:0.7rem; flex-wrap:wrap; }
        .nav-hints kbd { background:#000; border:1px solid #555; color:#fff;
                         border-radius:0; padding:0 5px; margin:0 2px; font-size:0.7rem; }
        .content { flex:1; overflow-y:auto; padding:20px 24px;
                   scrollbar-width:thin; scrollbar-color:#fff #000; }
        .page-nav { display:flex; justify-content:center; margin:14px 0; }
        .page-nav a { border:3px solid #fff; color:#fff; padding:9px 22px;
                      border-radius:0; text-decoration:none; font-family:Impact;
                      font-size:1rem; letter-spacing:2px; }
        .page-nav a:hover { background:#fff; color:#000; }
        .page-nav-footer { flex-shrink:0; padding:6px 24px; display:flex; justify-content:center;
            background:#000; border-top:4px solid #fff; }
        .post { background:#000; border:3px solid #fff; border-radius:0;
                padding:20px 22px; margin-bottom:14px; cursor:pointer;
                transition:border-color 0.1s,background 0.1s; }
        .post:hover { border-color:var(--red); }
        .post-active { border-color:var(--red) !important; background:#0d0000 !important;
                       border-left-width:8px !important; box-shadow:none !important; }
        .post-header { display:flex; justify-content:space-between; margin-bottom:12px; }
        .post-time { color:#aaa; font-family:'Courier New',monospace; font-size:0.82rem; }
        .post-text { font-family:'Arial',sans-serif; font-size:1rem; line-height:1.5; }
        .post-text a { color:var(--red); text-decoration:underline; }
        .post-audio { width:100%; margin-top:10px; }
        .post-modal { display:none; position:fixed; inset:0; z-index:100;
                      background:rgba(0,0,0,0.98); overflow-y:auto; padding:40px 20px; }
        .post-modal.active { display:block; }
        .modal-inner { max-width:780px; margin:0 auto; background:#000;
                       border:4px solid #fff; border-radius:0; padding:38px;
                       box-shadow:8px 8px 0 var(--red); }
        .modal-close { float:right; background:none; border:none; color:var(--red);
                       font-family:Impact; font-size:1.3rem; cursor:pointer; letter-spacing:2px; }
        @media(max-width:640px) { .nav-hints{padding:6px 16px} .nav-hints .nav-hints-row{padding:6px 0;gap:8px} .nav-hints kbd{display:none} .nav-hints-label,.nav-hints-spacer{display:none} .nav-fx-button{padding:10px 0;min-height:44px;flex:1 1 auto;justify-content:center;gap:0.2rem} header{padding:10px 16px;} .logo-mark{font-size:2rem;} .content{padding:12px 14px} .transmit-btn{padding-top:11px;padding-bottom:11px;min-height:44px} .modal-close{padding:10px 14px;min-width:44px;min-height:44px;text-align:center} }
        [data-sno-theme="brutalist"] .splash-overlay { background:#000; }
        [data-sno-theme="brutalist"] .splash-frame {
            border:6px solid #fff; padding:clamp(1.5rem,5vw,2.5rem) clamp(1.25rem,4vw,2rem);
            box-shadow: 12px 12px 0 var(--red); animation: splashBrutalJolt 3s steps(2,end) infinite;
        }
        @keyframes splashBrutalJolt { 0%,100% { transform: translate(0,0); } 50% { transform: translate(2px,-2px); } }
        [data-sno-theme="brutalist"] .splash-title { font-family:Impact,sans-serif; font-size:clamp(1.8rem,6vw,2.8rem); color:#fff; }
        [data-sno-theme="brutalist"] .splash-tag { font-family:'Courier New',monospace; color:var(--red); }
        [data-sno-theme="brutalist"] .splash-hint { font-family:'Courier New',monospace; color:#c8c8c8; }
        [data-sno-theme="brutalist"] .splash-inner { text-shadow: 0 0 12px #000, 0 2px 8px #000; }