body {
    transition: background-color 0.2s, color 0.3s, background-image 0.5s ease-in-out;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

[data-bs-theme="dark"] .card {
    background-color: #1e1e1e;
}

[data-bs-theme="dark"] .btn-outline-primary {
    color: #7a66fa;
    border-color: #7a66fa;
}

[data-bs-theme="dark"] .btn-outline-primary:hover {
    background-color: #7a66fa;
    color: #ffffff;
}

[data-bs-theme="dark"] .list-group-item {
    color: #ffffff !important;
}

[data-bs-theme="light"] .card {
    background-color: #ffffff;
}

[data-bs-theme="light"] .list-group-item {
    color: #000000 !important;
}

.grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 10px;
}

.grid-item {
    border-radius: 10px;
    padding: 10px;
    text-align: center;
    box-shadow: 0 2px 4px  rgba(0,0,0,0.1);
    min-height: 80px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    color: #ffffff;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    cursor: pointer;
}

.grid-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

.grid-item .day {
    font-weight: bold;
    font-size: 1.2em;
}

.grid-item .users {
    font-size: 0.8em;
}

.list-group-item {
    border-radius: 10px !important;
    margin-bottom: 10px;
    color: #000000 !important;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.list-group-item:hover {
    transform: translateX(5px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

.list-group-item .day {
    font-weight: bold;
    margin-right: 10px;
}

#prevMonth, #nextMonth {
    display: block;
}

.card {
    border-radius: 15px;
}

.card-body {
    padding: 2rem;
}

/* Estilos para el modo oscuro */
[data-bs-theme="dark"] {
    background-color: #121212;
    color: #ffffff;
}

.birthday-popup {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.birthday-popup-content {
    background-color: #ffffff;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
    position: relative;
    max-width: 80%;
    max-height: 80%;
    overflow-y: auto;
}

[data-bs-theme="dark"] .birthday-popup-content {
    background-color: #2c2c2c;
    color: #ffffff;
}

.close-popup {
    position: absolute;
    top: 10px;
    right: 10px;
    background: none;
    border: none;
    font-size: 1.5em;
    cursor: pointer;
}

#local-time {
    font-size: 1.2em;
    font-weight: bold;
    cursor: pointer;
}

footer {
    font-size: 0.8em;
    opacity: 0.8;
}

footer p {
    margin-bottom: 0.5em;
}

@media (max-width: 768px) {
    .grid {
        grid-template-columns: repeat(7, 1fr);
        gap: 5px;
    }

    .grid-item {
        padding: 5px;
        min-height: 60px;
    }

    .grid-item .day {
        font-size: 1em;
    }

    .grid-item .users {
        font-size: 0.7em;
    }
}