:root {
    --papel: #efe6d6;
    --papel-claro: #f8f2e7;
    --tinta: #141210;
    --tinta-suave: #4a443d;
    --rojo: #a3161c;
    --rojo-oscuro: #7c0f14;
    --linea: #d6cbb7;
    --sombra: 0 18px 40px -18px rgba(20, 18, 16, .45);
}

* { box-sizing: border-box; }

body {
    margin: 0;
    min-height: 100vh;
    background-color: #1b1917;
    background-image:
        radial-gradient(circle at 15% 10%, rgba(163, 22, 28, .35), transparent 40%),
        radial-gradient(circle at 85% 90%, rgba(163, 22, 28, .25), transparent 45%),
        repeating-linear-gradient(45deg, #222 0 40px, #1b1917 40px 80px);
    color: var(--tinta);
    font: 17px/1.6 "Lora", Georgia, serif;
    padding: 32px 16px 48px;
}

.hoja {
    max-width: 720px;
    margin: 0 auto;
    background: var(--papel);
    background-image:
        linear-gradient(rgba(255, 255, 255, .35), rgba(255, 255, 255, 0)),
        repeating-linear-gradient(0deg, rgba(0, 0, 0, .018) 0 2px, transparent 2px 4px);
    box-shadow: 0 30px 60px -20px rgba(0, 0, 0, .7);
    border-radius: 3px;
    overflow: hidden;
}

.portada { margin: 0; line-height: 0; border-bottom: 4px solid var(--rojo); }
.portada img { width: 100%; height: auto; display: block; }

.cabecera { text-align: center; padding: 28px 24px 0; }

.titulo {
    margin: 0;
    font-family: "Playfair Display", Georgia, serif;
    font-weight: 900;
    font-size: clamp(2.4rem, 8vw, 3.6rem);
    line-height: 1;
    letter-spacing: .02em;
    text-transform: uppercase;
}
.titulo-ordo { color: var(--tinta); }
.titulo-amoris { color: var(--rojo); font-style: italic; font-weight: 700; }

.lema {
    margin: 10px 0 0;
    font-family: "Caveat", cursive;
    font-size: 1.6rem;
    color: var(--tinta-suave);
}

.tarjeta {
    position: relative;
    margin: 24px;
    padding: 28px;
    background: var(--papel-claro);
    border: 1px solid var(--linea);
    box-shadow: var(--sombra);
    transform: rotate(-.3deg);
}
.tarjeta::before {
    /* cinta adhesiva */
    content: "";
    position: absolute;
    top: -12px; left: 50%;
    width: 110px; height: 24px;
    transform: translateX(-50%) rotate(2deg);
    background: rgba(214, 196, 160, .75);
    box-shadow: 0 1px 2px rgba(0, 0, 0, .15);
}

.intro { margin: 0 0 20px; color: var(--tinta-suave); }
.intro strong { color: var(--rojo); }

.etiqueta { display: block; font-weight: 500; margin-bottom: 10px; }
.etiqueta-mano {
    display: block;
    font-family: "Caveat", cursive;
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--rojo);
    line-height: 1.1;
}

textarea {
    width: 100%;
    min-height: 200px;
    resize: vertical;
    padding: 14px 16px;
    font: inherit;
    color: var(--tinta);
    background:
        repeating-linear-gradient(transparent 0 31px, rgba(163, 22, 28, .12) 31px 32px),
        #fffdf8;
    background-attachment: local;
    line-height: 32px;
    border: 1.5px solid var(--tinta);
    border-radius: 2px;
    transition: border-color .2s, box-shadow .2s;
}
textarea:focus {
    outline: none;
    border-color: var(--rojo);
    box-shadow: 0 0 0 4px rgba(163, 22, 28, .15);
}

.pie-campo {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    font-size: .85rem;
    color: var(--tinta-suave);
    margin: 6px 0 22px;
}

.boton {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: 14px 24px;
    font-family: "Playfair Display", Georgia, serif;
    font-size: 1.15rem;
    font-weight: 800;
    letter-spacing: .12em;
    text-transform: uppercase;
    text-decoration: none;
    color: var(--papel-claro);
    background: var(--rojo);
    border: 0;
    border-radius: 2px;
    cursor: pointer;
    box-shadow: 4px 4px 0 var(--tinta);
    transition: transform .12s, box-shadow .12s, background .2s;
}
.boton:hover { background: var(--rojo-oscuro); }
.boton:active { transform: translate(3px, 3px); box-shadow: 1px 1px 0 var(--tinta); }
.boton:focus-visible { outline: 3px solid var(--tinta); outline-offset: 3px; }
.boton:disabled { opacity: .7; cursor: wait; }
.boton-sec { background: var(--tinta); box-shadow: 4px 4px 0 var(--rojo); width: auto; }
.boton-sec:hover { background: #2c2925; }

.aviso {
    margin: 0 0 18px;
    padding: 10px 14px;
    border-left: 4px solid var(--rojo);
    background: rgba(163, 22, 28, .08);
    color: var(--rojo-oscuro);
}

.gracias { text-align: center; padding: 12px 0; }
.gracias h2 {
    font-family: "Playfair Display", Georgia, serif;
    font-size: 2rem;
    margin: 8px 0;
}
.gracias p { color: var(--tinta-suave); margin: 0 0 24px; }
.corazon {
    width: 56px; height: 50px;
    fill: none;
    stroke: var(--rojo);
    stroke-width: 4;
    stroke-linejoin: round;
}

.solo-lector {
    position: absolute; width: 1px; height: 1px; overflow: hidden;
    clip: rect(0 0 0 0); white-space: nowrap;
}

.trampa { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

.pie {
    text-align: center;
    padding: 4px 24px 26px;
    font-family: "Caveat", cursive;
    font-size: 1.35rem;
    color: var(--tinta-suave);
}
.cruz { color: var(--rojo); }

/* Panel de administración */
.mensajes { list-style: none; margin: 0; padding: 0; }
.mensajes li {
    padding: 16px 0;
    border-bottom: 1px dashed var(--linea);
    white-space: pre-wrap;
    word-wrap: break-word;
}
.mensajes time { display: block; font-size: .8rem; color: var(--rojo); font-weight: 500; margin-bottom: 4px; }
.barra { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 8px; }
.barra a { color: var(--rojo); }
.exportar { display: flex; gap: 14px; flex-wrap: wrap; margin: 16px 0 8px; }
.exportar .boton { flex: 1 1 200px; width: auto; font-size: .95rem; padding: 12px 16px; }
.nota { font-size: .85rem; color: var(--tinta-suave); margin: 4px 0 12px; }
input[type="password"] {
    width: 100%; padding: 12px 14px; font: inherit;
    border: 1.5px solid var(--tinta); border-radius: 2px; background: #fffdf8; margin-bottom: 16px;
}

@media (max-width: 520px) {
    body { padding: 0; font-size: 16px; }
    .hoja { border-radius: 0; }
    .tarjeta { margin: 20px 16px; padding: 22px 18px; transform: none; }
    .pie-campo { flex-direction: column; gap: 2px; }
}