:root {
    --primary-color: #3498db;
    --secondary-color: #e74c3c;
    --background-color: #f5f5f5;
    --text-color: #333;
    --border-color: #ddd;
    --today-background: #e8f4fd;
    --today-border: #3498db;
    --header-background: #333333;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, sans-serif;
}

/*body {*/
/*    background-color: var(--background-color);*/
/*    color: var(--text-color);*/
/*    display: flex;*/
/*    justify-content: center;*/
/*    align-items: center;*/
/*    min-height: 100vh;*/
/*    padding: 20px;*/
/*}*/

.calendar-container {
    background-color: #333333;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    width: 400px;
    max-width: 400px;
    overflow: hidden;
}

.calendar-header {
    background-color: var(--header-background);
    padding: 20px;
    text-align: center;
    position: relative;
    border-bottom: 1px solid var(--border-color);
}

.month-year {
    font-size: 24px;
    font-weight: bold;
    margin: 0 20px;
}

.navigation {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 10px;
}

.nav-button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 8px 15px;
    border-radius: 5px;
    cursor: pointer;
    font-weight: bold;
    transition: background-color 0.3s;
}

.nav-button:hover {
    background-color: #2980b9;
}

.days-header {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    background-color: var(--primary-color);
    color: white;
    padding: 10px 0;
    font-weight: bold;
    text-align: center;
}

.day-name {
    padding: 5px;
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    padding: 10px;
    gap: 5px;
}

.day {
    aspect-ratio: 1/1;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 5px;
    border-radius: 5px;
    border: 1px solid var(--border-color);
    font-weight: bold;
}

.today {
    background-color: var(--today-background);
    border: 2px solid var(--today-border);
    color: var(--primary-color);
}

.other-month {
    color: #aaa;
    background-color: #222222;
}

@media (max-width: 500px) {
    .month-year {
        font-size: 20px;
    }

    .day {
        font-size: 14px;
    }
}