:root {
    --azul: #1f3a5f;
    --azul-claro: #2c5282;
    --gris-fondo: #f5f7fa;
    --gris-borde: #dfe3e8;
    --texto: #1a202c;
    --verde: #2f855a;
    --rojo: #c53030;
}
* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
    background: var(--gris-fondo);
    color: var(--texto);
}
.topbar {
    background: var(--azul);
    color: #fff;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 24px;
    height: 56px;
}
.topbar-brand { font-weight: 700; font-size: 18px; }
.topbar-brand span { font-weight: 400; opacity: .8; }
.topbar-nav { display: flex; align-items: center; gap: 18px; }
.topbar-nav a { color: #e2e8f0; text-decoration: none; font-size: 14px; }
.topbar-nav a:hover { color: #fff; text-decoration: underline; }
.topbar-user { font-size: 13px; opacity: .85; }
.topbar-logout { background: rgba(255,255,255,.15); padding: 6px 12px; border-radius: 4px; }
.container { max-width: 1100px; margin: 24px auto; padding: 0 20px 60px; }
h1 { font-size: 22px; color: var(--azul); }
h2 { font-size: 18px; color: var(--azul); }
.card {
    background: #fff;
    border: 1px solid var(--gris-borde);
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 20px;
}
table.tabla {
    width: 100%;
    border-collapse: collapse;
    background: #fff;
}
table.tabla th {
    background: var(--azul);
    color: #fff;
    text-align: left;
    padding: 10px 12px;
    font-size: 13px;
}
table.tabla td {
    padding: 9px 12px;
    border-bottom: 1px solid var(--gris-borde);
    font-size: 13px;
}
table.tabla tr:hover { background: #f8fafc; }
.btn {
    display: inline-block;
    background: var(--azul);
    color: #fff;
    border: none;
    padding: 9px 16px;
    border-radius: 5px;
    font-size: 14px;
    text-decoration: none;
    cursor: pointer;
}
.btn:hover { background: var(--azul-claro); }
.btn-secundario { background: #718096; }
.btn-peligro { background: var(--rojo); }
.btn-sm { padding: 5px 10px; font-size: 12px; }
.form-group { margin-bottom: 14px; }
.form-group label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 4px; color: #4a5568; }
.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 8px 10px;
    border: 1px solid var(--gris-borde);
    border-radius: 5px;
    font-size: 14px;
}
.fila-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 14px; }
.alerta { padding: 12px 16px; border-radius: 6px; margin-bottom: 16px; font-size: 14px; }
.alerta-error { background: #fed7d7; color: #822727; border: 1px solid #feb2b2; }
.alerta-exito { background: #c6f6d5; color: #22543d; border: 1px solid #9ae6b4; }
.badge { padding: 3px 9px; border-radius: 12px; font-size: 11px; font-weight: 600; }
.badge-borrador { background: #e2e8f0; color: #4a5568; }
.badge-enviada { background: #bee3f8; color: #2c5282; }
.badge-aprobada { background: #c6f6d5; color: #22543d; }
.badge-rechazada { background: #fed7d7; color: #822727; }
.badge-vencida { background: #faf089; color: #744210; }
.login-wrap { max-width: 360px; margin: 80px auto; }
.linea-producto-row { display: grid; grid-template-columns: 3fr 1fr 1fr 1fr auto; gap: 10px; align-items: end; margin-bottom: 10px; }
.totales-box { text-align: right; font-size: 15px; margin-top: 16px; }
.totales-box strong { color: var(--azul); }