:root {
  font-family: "Segoe UI", "Microsoft JhengHei", Arial, sans-serif;
  color: #17202b;
  background: #fff3f7;
}
* { box-sizing: border-box; }
body { margin: 0; padding: 28px 16px; }
.installer { width: min(100%, 680px); margin: auto; padding: 30px; border: 1px solid #d9e0e3; border-radius: 18px; background: white; box-shadow: 0 16px 44px rgba(8,41,86,.1); }
h1 { margin: 0 0 8px; color: #082956; font-size: 28px; }
h2 { margin: 28px 0 12px; color: #082956; font-size: 19px; }
p, li { color: #5d6975; line-height: 1.6; }
.field { display: grid; gap: 7px; margin-bottom: 16px; }
label { color: #082956; font-weight: 700; }
input { width: 100%; min-height: 48px; padding: 10px 12px; border: 1px solid #bec9cd; border-radius: 9px; font: inherit; }
input:focus { outline: 3px solid rgba(194,24,91,.16); border-color: #c2185b; }
button, .button { display: inline-flex; min-height: 48px; align-items: center; justify-content: center; padding: 10px 18px; color: white; border: 0; border-radius: 9px; background: #c2185b; font: inherit; font-weight: 750; text-decoration: none; cursor: pointer; }
.notice { margin: 18px 0; padding: 14px 16px; border-radius: 10px; background: #fde7f0; color: #8f1749; }
.error { background: #fef3f2; color: #9f2018; }
.warning { background: #fff7e8; color: #6b4508; }
code { font-family: Consolas, monospace; }
@media (max-width: 540px) { .installer { padding: 22px 18px; } }