:root { --side: #101c1b; --primary: #0b4947; --ink: #152321; --muted: #647370; --line: #dde2dd; --accent: #d95632; --danger: #b42318; }
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; display: grid; place-items: center; padding: 16px; font: 14px/1.5 "Segoe UI", system-ui, sans-serif; color: var(--ink);
  background: radial-gradient(circle at 20% 10%, #1f3a37 0, var(--side) 55%); }
.card { width: min(420px, 100%); background: #fff; border-radius: 16px; padding: 32px; box-shadow: 0 18px 50px rgba(16, 28, 27, .22); }
.brand { display: flex; align-items: center; gap: 10px; margin-bottom: 20px; }
.brand b { display: block; font-size: 18px; line-height: 1; }
.brand small { display: block; font-size: 10px; letter-spacing: .2em; color: var(--accent); font-weight: 700; }
.logo { width: 34px; height: 34px; border-radius: 9px; background: var(--accent); color: #fff; display: grid; place-items: center; font-weight: 800; }
h1 { font-size: 22px; margin: 0 0 4px; }
.muted { color: var(--muted); margin: 0 0 16px; }
.small { font-size: 12px; color: var(--muted); word-break: break-all; }
form { display: grid; gap: 12px; margin-top: 8px; }
label { display: grid; gap: 4px; font-weight: 600; font-size: 13px; }
input { font: inherit; padding: 10px 12px; border: 1px solid var(--line); border-radius: 8px; }
input:focus { outline: 2px solid var(--primary); outline-offset: 1px; }
.btn { font: inherit; font-weight: 700; padding: 11px; border: 0; border-radius: 8px; background: var(--primary); color: #fff; cursor: pointer; }
.btn:disabled { opacity: .6; cursor: wait; }
.link { font: inherit; font-size: 12px; background: none; border: 0; color: var(--primary); cursor: pointer; padding: 8px 0 0; display: block; }
.error { color: var(--danger); background: #fdecea; border-radius: 8px; padding: 10px 12px; margin: 12px 0 0; }
.qr { display: block; margin: 0 auto 8px; }
.codes { columns: 2; font-family: ui-monospace, Consolas, monospace; padding-left: 18px; }
code { font-family: ui-monospace, Consolas, monospace; }