:root { --bg:#0b1020; --fg:#e9eef7; --muted:#9fb3c8; --card:#121a33; --accent:#6aa8ff; }
* { box-sizing: border-box; }
body { margin:0; font-family: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, "Helvetica Neue", Arial; background:var(--bg); color:var(--fg); }
.container { max-width: 980px; margin: 0 auto; padding: 20px; }
.topbar { background: #0f1730; border-bottom: 1px solid #1e2a52; }
.app-title { margin: 0; font-size: 20px; }
nav a { color: var(--muted); margin-left: 14px; text-decoration: none; }
nav a:hover { color: var(--fg); }
h2 { margin-top: 0; }
.form { display: grid; gap: 12px; max-width: 420px; }
label { display: grid; gap: 6px; font-size: 14px; color: var(--muted); }
input, button { padding: 10px 12px; border-radius: 10px; border: 1px solid #2a3a6a; background: #0f1730; color: var(--fg); }
button { background: var(--accent); border: none; color: #051024; font-weight: 600; cursor: pointer; }
.alert { padding: 10px 12px; border-radius: 10px; margin: 10px 0; }
.alert-danger { background: #3a0d18; border: 1px solid #7a1f35; }
.alert-success { background: #0d3a18; border: 1px solid #1f7a35; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; }
.card { background: var(--card); border: 1px solid #1f2a52; border-radius: 16px; padding: 16px; }
.footer { border-top: 1px solid #1e2a52; color: var(--muted); }
.hint { color: var(--muted); }