body {
    background-color: #eee7d9;
    font-family: 'Georgia', serif;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-image: url('../assets/fondo.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-blend-mode: overlay;
}

.container {
    width: 90%;
    max-width: 500px;
    text-align: center;
    padding: 40px;
    position: relative;
}

.sobre-contenedor {
    position: relative;
    width: 100%;
    height: 250px;
    margin: 0 auto 20px;
    perspective: 1500px;
}

.sobre {
    width: 320px;
    height: 200px;
    background-color: #e0d5c0;
    border-radius: 5px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.2);
    position: relative;
    margin: 0 auto;
    transition: all 0.3s ease;
    transform-style: preserve-3d;
}

.sobre-cuerpo {
    width: 100%;
    height: 100%;
    background-color: #d5c7aa;
    border-radius: 5px;
    position: absolute;
    top: 0;
    left: 0;
    z-index: 1;
    overflow: hidden;
    border: 1px solid #b9a483;
    box-shadow: inset 0 0 30px rgba(0,0,0,0.1);
}

.sobre-frontal {
    width: 100%;
    height: 50%;
    background-color: #d5c7aa;
    position: absolute;
    bottom: 0;
    left: 0;
    z-index: 3;
    transform-origin: top;
    transition: transform 1s cubic-bezier(0.645, 0.045, 0.355, 1);
    border-radius: 0 0 5px 5px;
    border-top: 1px dashed #b9a483;
}

.sobre-solapa {
    position: absolute;
    width: 100%;
    height: 0;
    padding-bottom: 50%;
    background-color: #c9b99a;
    top: 0;
    left: 0;
    transform-origin: bottom;
    transition: transform 1.2s cubic-bezier(0.645, 0.045, 0.355, 1);
    z-index: 4;
    clip-path: polygon(0 100%, 50% 0, 100% 100%);
    box-shadow: 0 -3px 10px rgba(0,0,0,0.1);
    border-top-left-radius: 5px;
    border-top-right-radius: 5px;
}

.sobre-solapa-lateral-izq {
    position: absolute;
    width: 40%;
    height: 100%;
    background-color: #d0c2a5;
    top: 0;
    left: 0;
    z-index: 2;
    clip-path: polygon(0 0, 100% 0, 0 100%);
    border-right: 1px dashed #b9a483;
}

.sobre-solapa-lateral-der {
    position: absolute;
    width: 40%;
    height: 100%;
    background-color: #d0c2a5;
    top: 0;
    right: 0;
    z-index: 2;
    clip-path: polygon(0 0, 100% 0, 100% 100%);
    border-left: 1px dashed #b9a483;
}

.sobre-carta {
    position: absolute;
    width: 80%;
    height: 90%;
    background-color: #f5eee2;
    z-index: 0;
    left: 10%;
    top: 5%;
    transition: transform 1.5s cubic-bezier(0.175, 0.885, 0.32, 1.275) 0.5s;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    background-image: url('../assets/fondo.jpg');
    background-size: cover;
    background-position: center;
    background-blend-mode: overlay;
    background-color: rgba(245, 238, 226, 0.9);
    border-radius: 3px;
    transform: translateY(0);
}

.sobre-sello {
    position: absolute;
    width: 60px;
    height: 60px;
    background-color: #8f3930;
    border-radius: 50%;
    top: 35%;
    left: 50%;
    transform: translateX(-50%) rotate(0deg);
    z-index: 5;
    box-shadow: 0 5px 10px rgba(0,0,0,0.2);
    display: flex;
    justify-content: center;
    align-items: center;
    color: #f5eee2;
    font-style: italic;
    font-size: 0.8rem;
    border: 2px solid #732d26;
    transition: all 0.8s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

.sobre-sello::before {
    content: '';
    position: absolute;
    width: 90%;
    height: 90%;
    border: 1px dashed #f5eee2;
    border-radius: 50%;
}

.sobre-sello::after {
    content: 'Amor';
    font-size: 0.8rem;
    font-family: 'Brush Script MT', cursive;
}

.sobre.abierto .sobre-solapa {
    transform: rotateX(180deg);
    transition-delay: 0.2s;
}

.sobre.abierto .sobre-frontal {
    transform: rotateX(-180deg);
    transition-delay: 0.8s;
}

.sobre.abierto .sobre-carta {
    transform: translateY(-80px) translateZ(10px);
    transition-delay: 1.3s;
}

.sobre.abierto .sobre-sello {
    opacity: 0;
    transform: translateX(-50%) rotate(45deg) scale(0.5);
    transition-delay: 0s;
}

.password-container {
    margin-top: 30px;
    padding: 20px;
    background-color: rgba(245, 238, 226, 0.9);
    border-radius: 5px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    border: 1px solid #d5c7aa;
}

h1 {
    color: #6b3c13;
    font-style: italic;
    margin-bottom: 20px;
    text-shadow: 1px 1px 2px rgba(102, 51, 0, 0.2);
}

p {
    color: #553b22;
    line-height: 1.6;
    margin-bottom: 20px;
}

input {
    width: 150px;
    padding: 10px;
    margin: 10px;
    border: 1px solid #d5c7aa;
    border-radius: 5px;
    background-color: #f9f5ec;
    color: #553b22;
    text-align: center;
    font-family: 'Georgia', serif;
}

button {
    padding: 10px 20px;
    background-color: #8f6845;
    color: #f5eee2;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-family: 'Georgia', serif;
    margin-top: 10px;
    transition: background-color 0.3s;
}

button:hover {
    background-color: #6b4e32;
}

.error-message {
    color: #8f3930;
    font-style: italic;
    margin-top: 10px;
    height: 20px;
}

.decoracion-esquina {
    position: absolute;
    width: 80px;
    height: 80px;
    opacity: 1;
}

.esquina-sup-izq {
    top: 0;
    left: 0;
}

.esquina-sup-der {
    top: 0;
    right: 0;
    transform: scaleX(-1);
}

.esquina-inf-izq {
    bottom: 0;
    left: 0;
    z-index: -2;
    transform: scaleY(-1);
}

.esquina-inf-der {
    bottom: 0;
    right: 0;
    transform: scale(-1);
}

.sobre-carta-lineas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 20px,
        rgba(102, 51, 0, 0.1) 20px,
        rgba(102, 51, 0, 0.1) 21px
    );
}

/* Efecto de resplandor del sello */
@keyframes sello-brillo {
    0%, 100% { box-shadow: 0 5px 10px rgba(0,0,0,0.2); }
    50% { box-shadow: 0 5px 20px rgba(143, 57, 48, 0.6), 0 0 15px rgba(143, 57, 48, 0.4); }
}

.sobre-sello {
    animation: sello-brillo 2s infinite;
}

/* Sombra dinámica para la carta */
@keyframes carta-flota {
    0%, 100% { box-shadow: 0 5px 15px rgba(0,0,0,0.1); }
    50% { box-shadow: 0 8px 20px rgba(0,0,0,0.15); }
}

.sobre.abierto .sobre-carta {
    animation: carta-flota 3s infinite ease-in-out;
}

/* Ligero movimiento de hover para el sobre */
.sobre-contenedor:hover .sobre:not(.abierto) {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.15);
}

/* Transición suave al volver */
.sobre:not(.abierto) {
    transition: transform 0.5s ease, box-shadow 0.5s ease;
}

@media (max-width: 600px) {
    .container {
        padding: 20px;
    }
    
    .sobre {
        width: 260px;
        height: 160px;
    }
    
    .sobre.abierto .sobre-carta {
        transform: translateY(-60px) translateZ(10px);
    }
}
.countdown-container {
    text-align: center;
    margin: 30px auto;
    font-family: 'Arial', sans-serif;
}

.countdown-title {
    font-size: 24px;
    margin-bottom: 20px;
    color: #8f3930;
}

.countdown-timer {
    display: flex;
    justify-content: center;
    gap: 15px;
}

.countdown-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    background-color: rgba(143, 57, 48, 0.1);
    border-radius: 8px;
    padding: 10px;
    min-width: 70px;
}

.countdown-value {
    font-size: 32px;
    font-weight: bold;
    color: #8f3930;
}

.countdown-label {
    font-size: 12px;
    color: #8f3930;
    text-transform: uppercase;
}

.hidden {
    display: none;
}