:root { --bg:#f4f6f9; --card:#fff; --ink:#0f1c2e; --muted:#5b6b80; --line:#e2e8f0; --brand:#0b3d91; --bad:#c0281f; }
@media (prefers-color-scheme: dark) { :root { --bg:#0d1420; --card:#151f2e; --ink:#e8eef7; --muted:#9fb0c6; --line:#24324a; --brand:#7fb0ff; --bad:#ff8a80; } }
* { box-sizing: border-box; }
body { margin: 0; font: 15px/1.5 "Segoe UI", system-ui, sans-serif; background: var(--bg); color: var(--ink); }
header { display: flex; justify-content: space-between; align-items: center; gap: 12px; background: var(--brand); color: #fff; padding: 16px; }
header h1 { margin: 0; font-size: 20px; }
header p { margin: 2px 0 0; opacity: .85; font-size: 13px; }
nav { display: flex; gap: 8px; flex-wrap: wrap; padding: 12px 16px; max-width: 1100px; margin: 0 auto; }
nav a { padding: 10px 14px; border: 1px solid var(--line); border-radius: 8px; color: var(--ink); text-decoration: none; min-height: 44px; }
nav a[aria-current="page"] { background: var(--brand); color: #fff; border-color: var(--brand); }
main { max-width: 1100px; margin: 0 auto; padding: 0 16px 24px; }
main.entrar { max-width: 420px; padding-top: 48px; }
h2 { font-size: 18px; }
.sub, .nota { color: var(--muted); font-size: 13px; }
.tabla { overflow-x: auto; background: var(--card); border: 1px solid var(--line); border-radius: 12px; }
table { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; }
th, td { text-align: left; padding: 8px 12px; border-bottom: 1px solid var(--line); }
.n { text-align: right; }
.bajo { color: var(--bad); font-weight: 600; }
.vacio { color: var(--muted); }
form label { display: block; font-weight: 600; margin: 14px 0 6px; }
form input { width: 100%; padding: 10px 12px; border: 1px solid var(--line); border-radius: 8px; font: inherit; background: var(--card); color: var(--ink); }
button { margin-top: 16px; padding: 10px 16px; min-height: 44px; border: 0; border-radius: 8px; background: var(--brand); color: #fff; font: inherit; font-weight: 600; cursor: pointer; }
button.salir { margin: 0; background: rgba(255,255,255,.18); }
.aviso { color: var(--bad); font-weight: 600; }
.llave { font-family: Consolas, monospace; word-break: break-all; padding: 12px; background: var(--card); border: 1px dashed var(--brand); border-radius: 8px; }
code { font-family: Consolas, monospace; }