:root { --bg: #121212; --panel: #1e1e1e; --text: #e6e6e6; --muted: #9a9a9a; --accent: #00c8ff; --err: #ff6b6b; }
* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body { background: var(--bg); color: var(--text); font: 15px/1.4 -apple-system, "Segoe UI", Roboto, sans-serif;
       display: flex; align-items: center; justify-content: center; padding: 16px; }
.box { width: 100%; max-width: 360px; background: var(--panel); border-radius: 10px; padding: 28px 24px;
       display: flex; flex-direction: column; gap: 14px; }
h1 { margin: 0; font-size: 22px; }
.sub { margin: 0 0 4px; color: var(--muted); font-size: 13px; }
.err { margin: 0; color: var(--err); font-size: 13px; }
label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: var(--muted); }
input { background: #2a2a2a; border: 1px solid #444; border-radius: 6px; color: var(--text); padding: 10px 12px; font-size: 15px; }
input:focus { outline: 2px solid var(--accent); border-color: transparent; }
button { margin-top: 6px; background: var(--accent); color: #002230; border: 0; border-radius: 6px; padding: 12px;
         font-weight: 700; letter-spacing: .06em; cursor: pointer; }