body {
    font-family: Arial, sans-serif;
    background-color: #f8f9fa;
    color: #333;
    margin: 0;
    padding: 0;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: #ffffff;
    padding: 10px 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.logo {
    color: #28a745;
    font-size: 24px;
    font-weight: bold;
    text-decoration: none;
}

nav {
    display: flex;
}

nav a {
    margin: 0 15px;
    color: #333;
    text-decoration: none;
    font-weight: 500;
}

nav a:hover {
    color: #28a745;
}

.dark-mode-btn {
    background-color: #28a745;
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 20px;
    cursor: pointer;
}

.container {
    max-width: 900px;
    margin: 20px auto;
    padding: 20px;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

.section {
    margin-bottom: 30px;
    padding: 15px;
    background: #f9f9f9;
    border-radius: 5px;
}

.section h2 {
    color: #28a745;
    margin-bottom: 15px;
}

.section p {
    margin: 10px 0;
    line-height: 1.6;
    color: #555;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin: 20px 0;
}

.tool {
    padding: 15px;
    background: #fff;
    border: 1px solid #ddd;
    border-radius: 5px;
    text-align: center;
    transition: transform 0.2s;
}

.tool:hover {
    transform: scale(1.05);
}

.tool h2 {
    margin: 0;
    color: #28a745;
}

.tool p {
    margin: 5px 0;
    color: #666;
}

ol, ul {
    padding-left: 20px;
}

.faq-item {
    margin: 10px 0;
}

.faq-question {
    background: #28a745;
    color: white;
    padding: 10px;
    border-radius: 5px 5px 0 0;
    cursor: pointer;
}

.faq-answer {
    display: none;
    background: #f1f1f1;
    padding: 10px;
    border-radius: 0 0 5px 5px;
}

.faq-answer.active {
    display: block;
}

.ad-space {
    background: #f0f0f0;
    padding: 20px;
    margin: 20px 0;
    text-align: center;
    border: 1px dashed #ccc;
}

footer {
    text-align: center;
    padding: 10px;
    background: #f8f9fa;
    color: #666;
}

footer a {
    color: #28a745;
    text-decoration: none;
    margin: 0 5px;
}

.dark-mode {
    background-color: #121212;
    color: #e0e0e0;
}

.dark-mode header {
    background-color: #1e1e1e;
    box-shadow: 0 2px 4px rgba(255,255,255,0.1);
}

.dark-mode .container {
    background: #1e1e1e;
    box-shadow: 0 0 10px rgba(255,255,255,0.1);
}

.dark-mode footer {
    background: #121212;
    color: #b0b0b0;
}

.dark-mode .ad-space {
    background: #2c2c2c;
    border-color: #444;
}

.dark-mode nav a {
    color: #e0e0e0;
}

.dark-mode nav a:hover {
    color: #28a745;
}

.dark-mode .logo {
    color: #28a745;
}

.dark-mode .section {
    background: #2c2c2c;
}

.dark-mode .section p {
    color: #b0b0b0;
}

.dark-mode .tool {
    background: #2c2c2c;
    border-color: #444;
}

.dark-mode .tool h2 {
    color: #28a745;
}

.dark-mode .tool p {
    color: #b0b0b0;
}

.dark-mode .faq-question {
    background: #218838;
}

.dark-mode .faq-answer {
    background: #1e1e1e;
}

@media (max-width: 768px) {
    header {
        flex-direction: column;
        align-items: flex-start;
    }
    nav {
        flex-direction: column;
        margin-top: 10px;
    }
    nav a {
        margin: 5px 0;
    }
    .container {
        padding: 10px;
    }
    .tools-grid {
        grid-template-columns: 1fr;
    }
}