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

body {
    background-color: #2cd6d6;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: #333;
    padding: 20px;
}

/* ID Selector */
#main-header {
    background-color: #2c3e50;
    color: white;
    text-align: left;
    padding: 30px 20px;
    border-radius: 10px;
    margin-bottom: 30px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

#main-header h1 {
    font-size: 2em;
    margin-bottom: 10px;
}

#main-header p {
    font-size: 1.1em;
    opacity: 0.9;
}

/* Class Selector */
.container {
    max-width: 750dvw;
    margin: 0 auto;
    background-color: white;
    padding: 30px;
    border-radius: 10px;
    border: 3px solid #3498db;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.description {
    font-size: 1.1em;
    line-height: 1.8;
    margin-bottom: 25px;
    padding: 15px;
    background-color: #f9f9f9;
    border-left: 4px solid #3498db;
}

.project-image {
    width: 100%;
    max-width: 600px;
    height: auto;
    display: block;
    margin: 25px auto;
    border-radius: 8px;
    border: 2px solid #ddd;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

/* Hover Effect on Image */
.project-image:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 16px rgba(26, 27, 28, 0.4);
}

.btn-container {
    text-align: center;
    margin: 30px 0;
}

.interactive-button {
    background-color: #3498db;
    color: white;
    font-size: 1.2em;
    padding: 15px 40px;
    border: none;
    border-radius: 25px;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.2s ease;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

/* Hover Effect on Button */
.interactive-button:hover {
    background-color: #2d2f30;
    transform: translateY(-2px);
    box-shadow: 0 6px 2px rgba(0, 0, 0, 0.2);
}

.interactive-button:active {
    transform: translateY(0);
}

.features-section {
    margin-top: 30px;
}

.features-section h2 {
    color: #2c3e50;
    margin-bottom: 15px;
    font-size: 1.5em;
}

.features-list {
    background-color: #ecf0f1;
    padding: 20px 20px 20px 40px;
    border-radius: 8px;
    margin-bottom: 20px;
}

.features-list li {
    margin: 12px 0;
    font-size: 1.05em;
    line-height: 1.6;
}

.features-list li strong {
    color: #2980b9;
}

#message-box {
    display: none;
    background-color: #27ae60;
    color: white;
    padding: 20px;
    border-radius: 8px;
    text-align: center;
    margin-top: 20px;
    font-size: 1.1em;
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

footer {
    text-align: center;
    margin-top: 30px;
    padding: 20px;
    color: #7f8c8d;
    font-size: 0.9em;
}

/* Responsive Design */
@media (max-width: 768px) {
    #main-header h1 {
        font-size: 1.5em;
    }

    #main-header p {
        font-size: 1em;
    }

    .container {
        padding: 20px;
    }

    .interactive-button {
        font-size: 1em;
        padding: 12px 30px;
    }

    .description {
        font-size: 1em;
    }
}

@media (max-width: 480px) {
    body {
        padding: 10px;
    }

    #main-header {
        padding: 20px 15px;
    }

    #main-header h1 {
        font-size: 1.3em;
    }

    .container {
        padding: 15px;
    }

    .interactive-button {
        padding: 10px 25px;
    }
}