/* Shared surface treatment: keep the wireframe visible around working content. */
.site-header,body>header{background:#071016c7;backdrop-filter:blur(14px)}
#chapters>section:before{background:none}
#builder .glass{background:linear-gradient(130deg,#10293ab7,#101a2ba8);border:0;box-shadow:inset 0 1px #b0daf02b,0 18px 42px #020b1845;backdrop-filter:blur(10px)}
#trial .decision-lab{background:radial-gradient(ellipse at 28% 64%,#1960513d,transparent 66%),linear-gradient(125deg,#09232bc9,#0b1c2bb5);box-shadow:inset 0 1px #b8e4ec31,0 20px 46px #020b1838;backdrop-filter:blur(10px)}
#trial .trial-route-visual{background:radial-gradient(ellipse at 48% 45%,#235e5243,#071b22c9 75%)}
#contact .contact-form{background:linear-gradient(135deg,#0c2b38c2,#101c2cbc);border-color:#90d9e445;box-shadow:inset 0 1px #c2eeef24,0 18px 42px #020b1840;backdrop-filter:blur(10px)}
.panel{background:linear-gradient(155deg,#0d1d27d5,#08131bca);box-shadow:inset 0 1px #ffffff10,0 18px 46px #0003;backdrop-filter:blur(9px)}
@media(max-width:650px){
 #builder .glass,#trial .decision-lab,#contact .contact-form{background-color:#0b1c2bd0}
 .panel{background:linear-gradient(155deg,#0d1d27e8,#08131be1)}
}