:root {
    --azul: #1B3A6B;
    --azul-claro: #2D5A9E;
    --acento: #F5A623;
    --fondo: #F5F7FB;
    --texto: #1B2430;
    --borde: #D8E0EE;
    --tarjeta: #FFFFFF;
}

@media (prefers-color-scheme: dark) {
    :root {
        --fondo: #10151F;
        --texto: #E8ECF4;
        --borde: #2A3242;
        --tarjeta: #171E2B;
    }
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: var(--fondo);
    color: var(--texto);
    line-height: 1.5;
}

.contenedor {
    max-width: 980px;
    margin: 0 auto;
    padding: 0 20px;
}

.topbar {
    background: var(--azul);
    color: #fff;
}

.topbar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 20px;
}

.marca {
    color: #fff;
    font-weight: 700;
    font-size: 1.25rem;
    text-decoration: none;
}

.topbar nav a {
    color: #DCE6F7;
    text-decoration: none;
    margin-left: 20px;
    font-size: 0.95rem;
}

.topbar nav a:hover { color: #fff; }

.pagina { padding: 40px 20px 60px; min-height: 60vh; }

.pie {
    padding: 24px 0;
    color: #8A93A6;
    font-size: 0.85rem;
    text-align: center;
    border-top: 1px solid var(--borde);
}

h1 { font-size: 2rem; margin-top: 0; }
h2 { color: var(--azul-claro); }

.hero {
    text-align: center;
    padding: 40px 0 20px;
}

.hero p { font-size: 1.1rem; color: #5A6478; }

.tarjetas {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    margin: 32px 0;
}

.tarjeta {
    background: var(--tarjeta);
    border: 1px solid var(--borde);
    border-radius: 10px;
    padding: 20px;
}

.boton {
    display: inline-block;
    background: var(--acento);
    color: #1B2430;
    font-weight: 600;
    padding: 10px 22px;
    border-radius: 8px;
    text-decoration: none;
    border: none;
    cursor: pointer;
    font-size: 0.95rem;
}

.boton:hover { opacity: 0.9; }

.boton-secundario {
    background: transparent;
    border: 1px solid var(--azul-claro);
    color: var(--azul-claro);
}

table {
    width: 100%;
    border-collapse: collapse;
    background: var(--tarjeta);
    border: 1px solid var(--borde);
    border-radius: 8px;
    overflow: hidden;
}

th, td {
    text-align: left;
    padding: 10px 12px;
    border-bottom: 1px solid var(--borde);
    font-size: 0.92rem;
}

th { background: rgba(45, 90, 158, 0.08); }

form.formulario {
    display: grid;
    gap: 14px;
    max-width: 560px;
}

.campo label {
    display: block;
    font-weight: 600;
    margin-bottom: 4px;
    font-size: 0.9rem;
}

.campo input, .campo select, .campo textarea {
    width: 100%;
    padding: 8px 10px;
    border: 1px solid var(--borde);
    border-radius: 6px;
    background: var(--tarjeta);
    color: var(--texto);
    font-size: 0.95rem;
}

.etiqueta {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 999px;
    font-size: 0.78rem;
    font-weight: 600;
}

.etiqueta-activo { background: #DCF3E3; color: #1E7B3E; }
.etiqueta-vencido { background: #FBDCDC; color: #B23A3A; }
.etiqueta-porvencer { background: #FDECC8; color: #9B6A11; }
.etiqueta-cancelado { background: #E4E7ED; color: #5A6478; }

.aviso { background: #FDECC8; border: 1px solid #E8C87A; padding: 10px 14px; border-radius: 8px; margin-bottom: 16px; }
.error { background: #FBDCDC; border: 1px solid #E8A0A0; padding: 10px 14px; border-radius: 8px; margin-bottom: 16px; }

pre.cadena-var {
    background: #10151F;
    color: #B9F5C4;
    padding: 14px;
    border-radius: 8px;
    overflow-x: auto;
    font-size: 0.9rem;
}