:root { --fondo: #f6f6f4; --texto: #1d1d1f; --suave: #6b6b6b; --borde: #ddd; --alerta: #b3261e; }
* { box-sizing: border-box; }
body { margin: 0; font: 15px/1.45 system-ui, sans-serif; background: var(--fondo); color: var(--texto); }
.barra { display: flex; align-items: center; justify-content: space-between; padding: .6rem 1rem; background: #fff; border-bottom: 1px solid var(--borde); }
.marca { font-weight: 700; text-decoration: none; color: inherit; }
main { max-width: 60rem; margin: 0 auto; padding: 1rem; }
h1 { font-size: 1.3rem; overflow-wrap: anywhere; }
a { color: #1a5fb4; }
button { font: inherit; padding: .4rem .9rem; cursor: pointer; }
.login { max-width: 22rem; margin: 3rem auto; display: grid; gap: .8rem; background: #fff; padding: 1.5rem; border: 1px solid var(--borde); border-radius: 8px; }
.login label { display: grid; gap: .25rem; }
.login input { font: inherit; padding: .45rem; }
.error, .alerta { color: var(--alerta); }
.alerta { background: #fdecea; padding: .6rem .8rem; border-radius: 6px; }
.lista { list-style: none; margin: 0; padding: 0; background: #fff; border: 1px solid var(--borde); border-radius: 8px; }
.lista li + li { border-top: 1px solid var(--borde); }
.lista a { display: grid; grid-template-columns: 14rem 1fr auto; gap: 1rem; padding: .6rem .8rem; color: inherit; text-decoration: none; min-width: 0; }
.lista span { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.no-leido .de, .no-leido .asunto { font-weight: 700; }
.aviso { color: var(--alerta); font-weight: 700; }
.fecha, .nota { color: var(--suave); font-size: .85rem; }
.cabeceras { display: grid; grid-template-columns: max-content 1fr; gap: .2rem 1rem; }
.cabeceras dt { color: var(--suave); }
.cabeceras dd { margin: 0; overflow-wrap: anywhere; }
.cuerpo { width: 100%; height: 70vh; border: 1px solid var(--borde); background: #fff; border-radius: 6px; }
.texto { white-space: pre-wrap; overflow-wrap: anywhere; background: #fff; padding: 1rem; border: 1px solid var(--borde); border-radius: 6px; }
@media (max-width: 40rem) { .lista a { grid-template-columns: 1fr; gap: .1rem; } }