:root { --sea: #0b3d5c; --sea-3: #072a40; --sea-4: #041c2c; --sand: #d9b382; --sand-2: #e9cfa5; --ink: #e6eef4; --muted: #8fb0c6; }
* { box-sizing: border-box; }
body {
  margin: 0; min-height: 100vh; display: flex; align-items: center; justify-content: center;
  background: radial-gradient(900px 520px at 50% -10%, #135a84, var(--sea-4) 72%); color: var(--ink);
  font-family: "Figtree", "Segoe UI", system-ui, sans-serif;
}
.door { width: 400px; max-width: 92vw; text-align: center; padding: 8px 24px 28px; }
.mark { display: block; margin: 0 auto 16px; width: 56px; height: 56px; border-radius: 12px; }
h1 { font-weight: 800; font-size: 1.6rem; margin: 0; letter-spacing: -.01em; color: #fff; }
.sub { color: var(--muted); font-size: .84rem; margin: .35rem 0 1.7rem; letter-spacing: .02em; }
form { text-align: left; }
label { display: block; font-size: .76rem; letter-spacing: .14em; text-transform: uppercase; font-weight: 700; color: var(--muted); margin: 0 0 7px; }
input {
  width: 100%; font: inherit; font-family: ui-monospace, Menlo, Consolas, monospace; letter-spacing: .12em;
  padding: .72rem .8rem; border: 1px solid #2c5f80; border-radius: 6px; background: #06202f; color: #fff;
}
input:focus { outline: none; border-color: var(--sand); box-shadow: 0 0 0 3px rgba(217, 179, 130, .25); }
button {
  width: 100%; margin-top: 14px; font: inherit; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; font-size: .84rem; cursor: pointer;
  padding: .78rem; border: 0; border-radius: 6px; background: var(--sand); color: var(--sea-4);
}
button:hover { background: var(--sand-2); }
.note { min-height: 1.2em; color: #f0a5a5; font-size: .9rem; text-align: center; margin: 14px 0 0; }
.help { color: #c9d9e4; font-size: .84rem; margin: 18px 0 0; line-height: 1.5; text-align: left; background: rgba(255, 255, 255, .06); border-radius: 6px; padding: 10px 12px; }
.fine { color: var(--muted); font-size: .74rem; margin-top: 18px; line-height: 1.5; }
.fine a { color: #c9d9e4; }