@import url('https://fonts.googleapis.com/css2?family=Quicksand:wght@400;600;700&display=swap');

:root {
    --primary-blue-soft: #4A90E2;
    --accent-purple: #9B59B6;
    --background-light: #F7F9FC;
    --card-back-color: #AEC6E8;
    --text-dark: #2c3e50;
    --text-light: #ffffff;
    --shadow-color: rgba(0, 0, 0, 0.15);
}

body {
    font-family: 'Quicksand', sans-serif, sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    background-color: var(--background-light);
    color: var(--text-dark);
    padding: 20px;
    min-height: 100vh;
}

       .back-to-home {
            display: block; 
            margin: 20px; 
            text-decoration: none; 
            color: var(--primary-blue-strong);
            font-weight: 600;
            transition: color 0.3s;
        }
        .back-to-home:hover {
            color: var(--accent-purple-strong);
        }
        .home-float-btn {
            position: fixed;
            top: 20px;
            right: 20px;
            width: 50px;
            height: 50px;
            background-color: var(--primary-blue-strong);
            color: var(--card-bg);
            border-radius: 50%;
            display: flex;
            justify-content: center;
            align-items: center;
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.4);
            text-decoration: none;
            font-size: 24px;
            transition: background-color 0.3s, transform 0.2s;
            z-index: 5000;
        }

        .home-float-btn:hover {
            background-color: var(--accent-purple-strong);
            transform: scale(1.1);
        }
        

h1 {
    color: var(--primary-blue-soft);
    font-size: 2.5em;
    font-weight: 700;
    margin-bottom: 5px;
    text-align: center; /* Asegura el centrado del título */
    width: 100%;
}

.game-container {
    display: grid;
    grid-template-columns: repeat(4, 150px);
    grid-template-rows: repeat(2, 150px);
    gap: 15px;
    margin: 30px 0;
    justify-content: center;
}

.card {
    width: 150px;
    height: 150px;
    perspective: 1000px;
    cursor: pointer;
}

.card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transition: transform 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    transform-style: preserve-3d;
    box-shadow: 0 6px 15px var(--shadow-color);
    border-radius: 12px;
}

.card.flipped .card-inner {
    transform: rotateY(180deg);
}

.card-front, .card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    display: flex;
    align-items: center;
    justify-content: center; /* Centrado horizontal */
    text-align: center; /* Asegura que el texto dentro esté centrado */
    padding: 5px; /* Pequeño padding para evitar que el texto toque el borde */
    box-sizing: border-box; /* Incluye padding y borde en el ancho/alto */
    border-radius: 12px;
    font-size: 2em;
    font-weight: bold;
    overflow: hidden;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    border: 3px solid var(--accent-purple);
}

.card-front {
    transform: rotateY(180deg);
    background-color: #E8F0FF;
    color: var(--text-dark);
    font-size: 1.5em;
    text-shadow: none;
}

.card-back {
    background-color: var(--card-back-color);
    color: var(--text-light);
    font-size: 4em;
    box-shadow: inset 0 0 20px rgba(0, 0, 0, 0.1);
}

.card.matched .card-inner {
    opacity: 0.6;
    pointer-events: none;
    box-shadow: 0 4px 10px rgba(74, 144, 226, 0.5);
}

.controls {
    margin-top: 30px;
    text-align: center;
}

.controls button {
    padding: 12px 30px;
    font-size: 1.1em;
    cursor: pointer;
    background-color: var(--accent-purple);
    color: var(--text-light);
    border: none;
    border-radius: 8px;
    font-weight: 600;
    transition: background-color 0.3s, transform 0.2s;
    box-shadow: 0 4px 10px rgba(155, 89, 182, 0.4);
}

.controls button:hover {
    background-color: #8E44AD;
    transform: translateY(-2px);
}