/* General Styles */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f9f9f9;
    padding: 20px;
}

h1 {
    font-size: 2.5rem;
    font-weight: 900;
    color: #2c3e50;
    margin-bottom: 1.5rem;
}

h2 {
    font-size: 2rem;
    font-weight: 700;
    color: #34495e;
    margin-top: 2rem;
    margin-bottom: 1rem;
}

h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #34495e;
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
}

p {
    font-size: 1.1rem;
    color: #555;
    margin-bottom: 1.5rem;
}

hr {
    border: 0;
    height: 1px;
    background: #ddd;
    margin: 2rem 0;
}

/* Input and Output Section */
.input-group {
    margin-bottom: 2rem;
}

.form-control {
    font-size: 1.1rem;
    padding: 12px 16px;
    border-radius: 8px;
    border: 2px solid #ddd;
    transition: border-color 0.3s ease;
}

.form-control:focus {
    border-color: #3498db;
    box-shadow: none;
}

.btn {
    font-size: 1.1rem;
    padding: 12px 20px;
    border-radius: 8px;
    transition: background-color 0.3s ease;
}

.btn-primary {
    background-color: #3498db;
    border: none;
}

.btn-primary:hover {
    background-color: #2980b9;
}

.btn-success {
    background-color: #2ecc71;
    border: none;
}

.btn-success:hover {
    background-color: #27ae60;
}

.btn-secondary {
    background-color: #95a5a6;
    border: none;
}

.btn-secondary:hover {
    background-color: #7f8c8d;
}

#output-section {
    margin-top: 2rem;
}

/* Dark Mode Styles */
body.dark-mode {
    background-color: #121212;
    color: #ffffff;
}

.dark-mode .form-control {
    background-color: #333;
    color: #fff;
    border-color: #444;
}

.dark-mode .btn-outline-secondary {
    border-color: #666;
    color: #fff;
}

.dark-mode h1,
.dark-mode h2,
.dark-mode h3 {
    color: #fff;
}

.dark-mode p {
    color: #ccc;
}

.dark-mode hr {
    background: #444;
}

/* Spacing and Layout */
.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

/* Link Cleaner Examples Section */
h3 {
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
}

h3 + p {
    margin-bottom: 1.5rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.75rem;
    }

    h3 {
        font-size: 1.25rem;
    }

    .form-control,
    .btn {
        font-size: 1rem;
    }
}

/* Footer Styles */
footer {
    background-color: #fff !important;
    border-top: 1px solid #ddd;
    margin-top: 3rem;
    padding: 2rem 0;
}

footer h5 {
    font-size: 1.2rem;
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 1rem;
}

footer ul {
    display: inline-block;
    margin: 0 auto;
}

footer ul li {
    margin-bottom: 0.75rem;
}

footer ul li a {
    color: #3498db;
    transition: color 0.3s ease;
    font-size: 1.1rem;
}

footer ul li a:hover {
    color: #2980b9;
}

footer .border-top {
    max-width: 500px;
    margin: 1.5rem auto 0;
    border-color: #eee !important;
}

footer p {
    color: #95a5a6;
    font-size: 0.9rem;
    margin-bottom: 0;
}