/* Unified domain + message diagnostics: scope existing mailtester controls to the domain card. */
.dsc-message-panel{background:#fff;border:1px solid #e1e8ef;border-radius:16px;margin:1.5rem 0;overflow:hidden;box-shadow:0 4px 18px rgba(20,47,75,.045)}
.dsc-message-head{padding:clamp(1.2rem,2.8vw,2rem) clamp(1.2rem,2.8vw,2rem) 0}
.dsc-message-head h2{font-size:1.35rem;font-weight:700;color:#153e60;margin:0 0 .5rem}
.dsc-message-head p{color:#526477;margin:0 0 1rem;line-height:1.6}
.dsc-message-head .dsc-message-eyebrow{font-size:.72rem;letter-spacing:.1em;font-weight:700;color:#17648f;margin-bottom:.4rem}
.dsc-message-panel .bt-mailtester{padding:0;background:transparent}
.dsc-message-panel .bt-mailtester-inner{max-width:none;padding:0 clamp(1.2rem,2.8vw,2rem) clamp(1.2rem,2.8vw,2rem)}
.dsc-message-panel .bt-mailtester section{border:1px solid #e5ebf1;border-radius:10px;margin:0 0 1rem;padding:clamp(1rem,2vw,1.5rem)}
.dsc-message-panel .bt-mailtester .cards{grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}
.dsc-message-panel .bt-mailtester pre{white-space:pre-wrap;overflow-wrap:anywhere}
.dsc-message-panel .bt-mailtester .address{overflow-wrap:anywhere;flex-wrap:wrap;gap:.75rem}
.dsc-message-panel .dsc-message-note{color:#64748b;font-size:.83rem;line-height:1.6;margin:0}
@media(max-width:767px){.dsc-message-panel .bt-mailtester button{max-width:100%}}