/* --- Global Styles & Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;600&display=swap');

:root {
    --bg-color: #eaf2f8;
    --primary-text-color: #566573;
    --card-shadow-light: rgba(255, 255, 255, 0.7);
    --card-shadow-dark: rgba(174, 182, 191, 0.5);
    --card-size: 100px; /* Controls the size of the cards */
}

body {
    margin: 0;
    font-family: 'Poppins', sans-serif;
    background-color: var(--bg-color);
    color: var(--primary-text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
    box-sizing: border-box;
}

/* --- Utility & Menu Buttons --- */
.hidden {
    display: none !important;
}

.menu-btn {
    font-family: 'Poppins', sans-serif;
    font-size: 1em;
    padding: 10px 20px;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    background-color: var(--bg-color);
    color: var(--primary-text-color);
    box-shadow: 5px 5px 10px var(--card-shadow-dark),
                -5px -5px 10px var(--card-shadow-light);
    transition: box-shadow 0.2s ease;
    margin: 5px;
}

.menu-btn:hover {
    box-shadow: inset 2px 2px 5px var(--card-shadow-dark),
                inset -2px -2px 5px var(--card-shadow-light);
}


/* --- Level Selection --- */
.level-select-container {
    text-align: center;
    padding: 30px;
    background-color: var(--bg-color);
    border-radius: 20px;
    box-shadow: 10px 10px 20px var(--card-shadow-dark),
                -10px -10px 20px var(--card-shadow-light);
    width: 100%;
    max-width: 700px;
}

.level-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
    gap: 15px;
    margin-top: 20px;
}

.level-btn {
    font-family: 'Poppins', sans-serif;
    font-size: 1.5em;
    padding: 20px;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    background-color: var(--bg-color);
    color: var(--primary-text-color);
    box-shadow: 5px 5px 10px var(--card-shadow-dark),
                -5px -5px 10px var(--card-shadow-light);
    transition: all 0.2s ease;
}

.level-btn:hover {
    box-shadow: inset 2px 2px 5px var(--card-shadow-dark),
                inset -2px -2px 5px var(--card-shadow-light);
}

.level-btn.locked {
    opacity: 0.5;
    cursor: not-allowed;
    box-shadow: inset 2px 2px 5px var(--card-shadow-dark);
}

.level-btn.locked:hover {
    box-shadow: inset 2px 2px 5px var(--card-shadow-dark);
}

/* --- Main Game Container --- */
.game-container {
    width: 100%;
    max-width: 800px;
    background-color: var(--bg-color);
    border-radius: 20px;
    padding: 30px;
    box-shadow: 10px 10px 20px var(--card-shadow-dark),
                -10px -10px 20px var(--card-shadow-light);
    text-align: center;
}

.game-header h1 {
    margin-top: 0;
    font-size: 2em;
}

.game-stats {
    display: flex;
    justify-content: space-around;
    font-size: 1.2em;
    margin-bottom: 20px;
}

/* --- Game Board and Cards --- */
.game-board {
    display: grid;
    gap: 15px;
    justify-content: center;
    margin: 0 auto;
}

.card {
    width: var(--card-size);
    height: var(--card-size);
    background-color: var(--bg-color);
    border-radius: 15px;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: box-shadow 0.3s ease;
    box-shadow: 5px 5px 10px var(--card-shadow-dark),
                -5px -5px 10px var(--card-shadow-light);
}

.card.flipped, .card.matched {
    box-shadow: inset 5px 5px 10px var(--card-shadow-dark),
                inset -5px -5px 10px var(--card-shadow-light);
    cursor: default;
}

.card i {
    font-size: 40px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.card.flipped i, .card.matched i {
    opacity: 1;
    color: #3498db;
}

/* --- Win/Lose Messages --- */
.win-message, .lose-message {
    display: none;
    margin-top: 20px;
}

.win-message.show, .lose-message.show {
    display: block;
}

.lose-message h2 {
    color: #e74c3c;
}