:root {
  --bg: #eef1f6; --surface: #fff; --text: #16264a; --text-2: #5d6b87; --text-3: #8b97ae;
  --border: #d7dded; --accent: #2f5fd0; --red: #cf3b34; --red-soft: rgba(207,59,52,.12);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1220; --surface: #161d2e; --text: #e8ecf6; --text-2: #a3aec5; --text-3: #7a8599;
    --border: #263048; --accent: #6f97e8; --red: #e8615a; --red-soft: rgba(232,97,90,.16);
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0; min-height: 100vh; background: var(--bg); color: var(--text);
  font: 14px/1.45 "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
.wrap { min-height: 100vh; display: grid; place-items: center; padding: 24px; }
.card {
  width: min(380px, 100%); background: var(--surface);
  border: 1px solid var(--border); border-radius: 16px;
  padding: 30px 28px 24px;
  box-shadow: 0 10px 40px rgba(9,14,26,.10);
}
.lock { width: 42px; height: 42px; color: var(--accent); margin-bottom: 14px; }
.lock svg { width: 100%; height: 100%; }
h1 { margin: 0; font-size: 19px; letter-spacing: -.02em; }
.sub { margin: 5px 0 22px; color: var(--text-3); font-size: 12.5px; }
label { display: block; font-size: 12px; font-weight: 600; color: var(--text-2); margin-bottom: 5px; }
input {
  width: 100%; height: 40px; padding: 0 12px; margin-bottom: 16px;
  background: var(--bg); color: var(--text);
  border: 1px solid var(--border); border-radius: 9px; font: inherit;
}
input:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
button {
  width: 100%; height: 42px; border: 0; border-radius: 9px;
  background: var(--accent); color: #fff; font: inherit; font-weight: 700;
  cursor: pointer; letter-spacing: .01em;
}
button:disabled { opacity: .6; cursor: default; }
.err {
  background: var(--red-soft); color: var(--red);
  border-radius: 8px; padding: 9px 11px; font-size: 12.5px; margin: 0 0 14px;
}
.foot { text-align: center; color: var(--text-3); font-size: 11.5px; margin: 16px 0 0; }