* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}




body {
    font-family: 'Arial', sans-serif;
    background: linear-gradient(
        rgba(0, 0, 0, 0.4),
        rgba(0, 0, 0, 0.4)
    ),
    url('sea-background.jpg') no-repeat center center fixed;
    background-size: cover;
    min-height: 100vh;
    padding: 20px;
    margin: 0;
}



.container {
    max-width: 800px;
    margin: 0 auto;
    background: white;
    border-radius: 20px;
    box-shadow: 0 15px 35px rgba(0,0,0,0.1);
    padding: 40px;
    text-align: center;
}

h1 {
    color: #333;
    margin-bottom: 30px;
    font-size: 2.2em;
}

.controls {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-bottom: 40px;
    align-items: center;
}

label {
    font-size: 1.1em;
    color: #555;
}

#vacation-date {
    padding: 12px 20px;
    border: 2px solid #ddd;
    border-radius: 8px;
    font-size: 16px;
    width: 250px;
}

#set-date {
    padding: 12px 30px;
    background: #4CAF50;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 16px;
    transition: background 0.3s;
}

#set-date:hover {
    background: #45a049;
}

.countdown-container {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin: 40px 0;
    flex-wrap: wrap;
}

.countdown-item {
    text-align: center;
    background: #f8f9fa;
    padding: 20px;
    border-radius: 12px;
    min-width: 100px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}

.countdown-item:hover {
    transform: translateY(-5px);
}

#days, #hours, #minutes, #seconds {
    display: block;
    font-size: 2.5em;
    font-weight: bold;
    color: #4CAF50;
    margin-bottom: 5px;
}

.label {
    display: block;
    color: #666;
    font-size: 0.9em;
}

.message {
    margin-top: 30px;
    padding: 15px;
    background: #e3f2fd;
    border-radius: 8px;
    color: #1976d2;
    font-size: 1.1em;
    font-weight: bold;
}

/* Адаптивность для мобильных устройств */
@media (max-width: 768px) {
    .container {
        padding: 20px;
        margin: 10px;
    }
    
    h1 {
        font-size: 1.8em;
    }
    
    .countdown-container {
        gap: 10px;
    }
    
    .countdown-item {
        min-width: 80px;
        padding: 15px;
    }
    
    #days, #hours, #minutes, #seconds {
        font-size: 2em;
    }
}