/* Smart Measure Premium — appearance only; no geometry/gesture overrides */
:root{font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif}
body{background:radial-gradient(ellipse 860px 460px at 10% 0,#1c4b62 0,transparent 68%),radial-gradient(ellipse 850px 500px at 93% 35%,#112d49 0,transparent 72%),#071625;color:#effaff}
header,main,footer{max-width:1370px}
header{padding-top:25px;padding-bottom:21px;border-bottom:1px solid #2c52674c}
.brand{font-size:31px;letter-spacing:-1.9px}
nav a{font-weight:700;font-size:12px;padding:9px 12px;border-radius:9px}
nav a:hover{background:#214456;color:#fff}
main>.eyebrow{font-size:11px;color:#73e2c8;letter-spacing:.18em}
main>h1{font-size:clamp(37px,4.8vw,58px);font-weight:870;letter-spacing:-.055em;margin:10px 0}
main>p:not(.eyebrow){max-width:900px;font-size:15px;line-height:1.75;color:#b8d0df}
.privacy{gap:9px;margin:18px 0}.privacy span{border-color:#47736e;background:#16453f77;color:#95edce;padding:8px 13px;font-size:11px}
.layout{grid-template-columns:minmax(0,1.65fr) minmax(315px,.88fr);gap:17px}
.panel{background:linear-gradient(145deg,#163348,#0d2539);border:1px solid #345d74;border-radius:20px;padding:clamp(17px,2.5vw,27px);box-shadow:0 18px 44px #06111c42}
.panel h2{font-size:19px;font-weight:850;letter-spacing:-.025em}
.tools{gap:9px;margin:16px 0}
button,.filebutton,select,input[type=number]{border-radius:10px;min-height:40px;font-weight:740}
button:hover:not(:disabled),.filebutton:hover{border-color:#75ecc5;box-shadow:0 4px 18px #16a98d11}
button.primary{background:linear-gradient(110deg,#137f7a,#209c88);border-color:#53bfb0}
.stage{background:#061927;border:1px solid #3b6478;border-radius:16px;min-height:370px;box-shadow:inset 0 0 40px #020e1955}
.hint{background:linear-gradient(105deg,#174259,#174a4c);border-left-color:#79e9c6;border-radius:10px;padding:14px;color:#d1f8eb}
.result{color:#76edbf}.results li{border-color:#325266}
.warning{background:#322b23;border-color:#947244;border-radius:12px}
footer{border-top:1px solid #315062;padding:25px}
@media(max-width:850px){.layout{grid-template-columns:1fr}.stage{min-height:310px}.panel{box-shadow:none}header nav{float:none;display:inline-block}}
@media(max-width:530px){main>h1{font-size:37px}.privacy span{font-size:10px}.panel{padding:15px}.tools button{font-size:12px}}
@media(prefers-reduced-motion:reduce){button,.filebutton{transition:none!important}}