:root {
  --bg: #F5F6F8;
  --surface: #FFFFFF;
  --surface-2: #EEF1F6;
  --ink: #1A2233;
  --ink-muted: #5C6678;
  --accent: #21508C;
  --accent-ink: #123055;
  --accent-soft: #E4ECF7;
  --line: #DCE2EA;
  --good: #1F7A4C;
  --good-soft: #E3F3EA;
  --warn: #9C6314;
  --warn-soft: #FBF0DD;
  --critical: #B23A3A;
  --critical-soft: #FBE6E6;
  color-scheme: light;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Source Sans 3", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.5;
}

h1, h2, h3 {
  font-family: "Fraunces", Georgia, serif;
  font-weight: 600;
  margin: 0 0 8px;
}

a { color: var(--accent); }

/* --- Estructura general --- */
.app-shell { min-height: 100vh; display: flex; flex-direction: column; }
.app-contenido { max-width: 880px; margin: 0 auto; padding: 28px 20px 60px; width: 100%; }

.cabecera, .cabecera-firma {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 24px; background: var(--surface); border-bottom: 1px solid var(--line);
}
.cabecera-logo { font-family: "Fraunces", serif; font-weight: 600; font-size: 1.1rem; color: var(--ink); text-decoration: none; }
.cabecera-usuario { display: flex; align-items: center; gap: 14px; font-size: 14px; color: var(--ink-muted); }

.pantalla-centrada { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 20px; }
.pantalla-firma { min-height: 100vh; }

/* --- Tarjetas y formularios --- */
.tarjeta {
  background: var(--surface); border: 1px solid var(--line); border-radius: 14px;
  padding: 24px; margin-bottom: 20px;
  box-shadow: 0 1px 2px rgba(20,30,50,.04), 0 8px 24px -12px rgba(20,30,50,.12);
}
.tarjeta-estrecha { max-width: 400px; width: 100%; }
.tarjeta.paso-completado { opacity: .55; pointer-events: none; }

.titulo-app { text-align: center; }
.subtitulo { text-align: center; color: var(--ink-muted); margin-bottom: 20px; }

.formulario { display: flex; flex-direction: column; gap: 14px; }
.formulario.oculto, .oculto { display: none !important; }

label { display: flex; flex-direction: column; gap: 5px; font-size: 14px; color: var(--ink-muted); font-weight: 600; }
label.fila-checkbox { flex-direction: row; align-items: center; gap: 8px; font-weight: 500; }

input, textarea {
  font: inherit; padding: 10px 12px; border: 1px solid var(--line); border-radius: 8px;
  background: var(--surface); color: var(--ink);
}
input:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
input[type="checkbox"] { width: 16px; height: 16px; }

.boton {
  font: inherit; font-weight: 600; padding: 10px 18px; border-radius: 8px;
  border: 1px solid transparent; cursor: pointer; text-decoration: none; display: inline-block;
}
.boton-primario { background: var(--accent); color: #fff; }
.boton-primario:disabled { opacity: .6; cursor: default; }
.boton-secundario { background: var(--accent-soft); color: var(--accent-ink); }
.boton-secundario:disabled { opacity: .5; cursor: not-allowed; }
.boton-texto { background: none; color: var(--ink-muted); border: none; padding: 6px 4px; }
.fila-botones { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 16px; }

.caja-mensajes:empty { display: none; }
.mensaje { padding: 10px 14px; border-radius: 8px; font-size: 14px; margin-bottom: 14px; }
.mensaje-error { background: var(--critical-soft); color: var(--critical); }
.mensaje-exito { background: var(--good-soft); color: var(--good); }
.mensaje-info { background: var(--accent-soft); color: var(--accent-ink); }

.texto-ayuda { color: var(--ink-muted); font-size: 14px; }
.enlace-volver { display: inline-block; margin-bottom: 16px; font-size: 14px; }

/* --- Tablas --- */
.tabla { width: 100%; border-collapse: collapse; background: var(--surface); border: 1px solid var(--line); border-radius: 10px; overflow: hidden; margin-bottom: 16px; }
.tabla th, .tabla td { text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--line); font-size: 14px; }
.tabla thead th { background: var(--surface-2); font-size: 12px; text-transform: uppercase; letter-spacing: .04em; color: var(--ink-muted); }
.tabla tbody tr:last-child td { border-bottom: none; }
.tabla-auditoria { font-size: 13px; }

.cabecera-seccion { display: flex; align-items: center; justify-content: space-between; margin-bottom: 20px; flex-wrap: wrap; gap: 10px; }

.estado { padding: 3px 10px; border-radius: 100px; font-size: 12px; font-weight: 600; }
.estado-borrador { background: var(--surface-2); color: var(--ink-muted); }
.estado-enviado, .estado-en_proceso { background: var(--warn-soft); color: var(--warn); }
.estado-completado { background: var(--good-soft); color: var(--good); }
.estado-rechazado, .estado-cancelado { background: var(--critical-soft); color: var(--critical); }

/* --- Nuevo documento --- */
.fila-destinatario {
  display: grid; grid-template-columns: 1.4fr 1fr 1.4fr 1fr auto auto; gap: 10px; align-items: end;
  padding: 12px 0; border-bottom: 1px solid var(--line);
}
.fila-destinatario label { font-size: 12px; }

/* --- Firma pública --- */
.visor-pdf { width: 100%; height: 60vh; border: 1px solid var(--line); border-radius: 10px; margin-bottom: 20px; background: #fff; }
.seccion-rechazo { margin-top: 18px; padding-top: 14px; border-top: 1px solid var(--line); display: flex; flex-direction: column; gap: 8px; align-items: flex-start; }

.error-pagina { text-align: center; padding: 60px 20px; color: var(--ink-muted); }

@media (max-width: 720px) {
  .fila-destinatario { grid-template-columns: 1fr 1fr; }
}