:root { --bg: #F3F5F9; --surface: #FFFFFF; --ink: #0F1B2D; --muted: #5A6A81; --line: #DCE2EC; --line2: #C6D0DE; --accent: #1E4FC2; --accent-hover: #173E9A; --bad: #B42318; --bad-bg: #FBE4E1; }
@media (prefers-color-scheme: dark) { :root { --bg: #0B1220; --surface: #111A2B; --ink: #E5ECF6; --muted: #98A7BD; --line: #22304A; --line2: #2E3E5C; --accent: #7FA3FF; --accent-hover: #A3BEFF; --bad: #FF8A7D; --bad-bg: #3A1512; color-scheme: dark; } }
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--ink); font: 15px/1.45 'Archivo', system-ui, -apple-system, 'Segoe UI', sans-serif; }
body { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.box { width: 100%; max-width: 380px; background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 28px 26px; box-shadow: 0 1px 2px rgba(15,27,45,.06), 0 8px 28px rgba(15,27,45,.07); }
.brand { display: flex; align-items: baseline; gap: 8px; margin-bottom: 18px; }
.brand b { font-weight: 800; letter-spacing: .14em; font-size: 13px; color: var(--accent); }
.brand span { font-weight: 600; font-size: 15px; }
h1 { font-size: 20px; margin: 0 0 16px; font-weight: 650; }
form { display: grid; gap: 14px; }
label { display: grid; gap: 5px; font-size: 13px; color: var(--muted); }
input { font: 15px 'Archivo', system-ui, sans-serif; padding: 10px 12px; border: 1px solid var(--line2); border-radius: 7px; background: var(--surface); color: var(--ink); width: 100%; }
input:focus { outline: 2px solid var(--accent); outline-offset: 1px; border-color: var(--accent); }
button { font: 600 15px 'Archivo', system-ui, sans-serif; padding: 11px 14px; border-radius: 7px; border: 0; background: var(--accent); color: #fff; cursor: pointer; margin-top: 4px; }
@media (prefers-color-scheme: dark) { button { color: #0B1220; } }
button:hover { background: var(--accent-hover); }
.err { background: var(--bad-bg); color: var(--bad); padding: 9px 12px; border-radius: 7px; font-size: 14px; }
.foot { margin: 16px 0 0; font-size: 12px; color: var(--muted); }