/* datum.music — brand base (docs/design/BRAND-GUIDELINE.html v0.1): one voice
   IBM Plex Mono · surfaces sur0–sur3 · inks · ONE accent "Ground" #F0356E, used
   for the wordmark stop and one action per page, never more. Flat ink. */
@font-face{font-family:"Plex";src:url(/fonts/IBMPlexMono-Regular.ttf) format("truetype");font-weight:400;font-display:swap}
@font-face{font-family:"Plex";src:url(/fonts/IBMPlexMono-Medium.ttf) format("truetype");font-weight:500;font-display:swap}
@font-face{font-family:"Plex";src:url(/fonts/IBMPlexMono-SemiBold.ttf) format("truetype");font-weight:600;font-display:swap}
:root{--sur0:#060708;--sur1:#0B0D11;--sur2:#0E1116;--sur3:#14181F;--inkHi:#E6ECF5;--ink1:#C9CED6;--ink2:#8A94A2;--ink3:#6B7684;
  --line1:rgba(255,255,255,.09);--lineStrong:rgba(255,255,255,.28);--ground:#F0356E;--rec:#EF4444}
html{background:var(--sur0);color:var(--ink1);font:15px/1.6 "Plex",ui-monospace,Menlo,monospace;-webkit-text-size-adjust:100%}
body{margin:0;min-height:100vh;display:grid;place-items:center;padding:24px;box-sizing:border-box}
main{width:min(440px,100%)}
.wordmark{font-weight:600;font-size:34px;letter-spacing:-.03em;color:var(--inkHi);margin:0 0 2px}
.wordmark b{color:var(--ground);font-weight:600}
.lead{margin:0 0 22px;color:var(--ink2)}
p{margin:0 0 16px}
.small{font-size:13px;color:var(--ink3)}
label{display:block;font-size:12px;letter-spacing:.06em;text-transform:uppercase;color:var(--ink3);margin:16px 0 6px}
input{width:100%;box-sizing:border-box;background:var(--sur2);color:var(--inkHi);border:1px solid var(--line1);border-radius:4px;padding:13px 14px;font:inherit;font-size:16px}
input:focus{outline:none;border-color:var(--lineStrong)}
button{margin-top:20px;width:100%;background:var(--inkHi);color:var(--sur0);border:0;border-radius:4px;padding:14px;font:inherit;font-size:15px;font-weight:600;cursor:pointer}
button[disabled]{opacity:.5;cursor:default}
.code{font-weight:600;font-size:22px;letter-spacing:.08em;color:var(--inkHi);background:var(--sur2);border:1px solid var(--line1);border-radius:4px;padding:16px;text-align:center;margin:12px 0;user-select:all}
.err{color:var(--rec);margin-top:12px;min-height:1.6em;font-size:13px}