:root { color-scheme: dark; --bg:#07080a; --card:#111317; --line:#262a31; --ink:#e9ebef; --mut:#8a919c; --acc:#c9ccd2; --err:#ff8a7a; }
* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body { background: radial-gradient(120% 80% at 50% 0%, #1a1d23 0%, var(--bg) 60%); color: var(--ink);
  font: 15px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, sans-serif; display: grid; place-items: center; padding: 16px; }
.card { width: 100%; max-width: 380px; background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 32px 28px; }
.mark { letter-spacing: .5em; font-size: 11px; color: var(--mut); margin-bottom: 18px; }
h1 { font-size: 22px; font-weight: 600; margin: 0 0 4px; letter-spacing: .01em; }
.sub { margin: 0 0 24px; color: var(--mut); font-size: 13px; }
label { display: block; font-size: 12px; color: var(--mut); margin-bottom: 6px; }
input { width: 100%; padding: 12px 14px; border-radius: 9px; border: 1px solid var(--line); background: #0b0c0f; color: var(--ink); font-size: 16px; }
input:focus { outline: 2px solid #5b6270; outline-offset: 1px; }
button { margin-top: 14px; width: 100%; padding: 12px; border: 0; border-radius: 9px; background: var(--acc); color: #0b0c0f; font-weight: 600; font-size: 15px; cursor: pointer; }
button:hover { background: #fff; }
.err { color: var(--err); font-size: 13px; margin: 14px 0 0; }