body {
    margin: 0;
    font-family: 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    background: #f0f2f5;
    color: #333;
    line-height: 1.6;
}

header {
    background: white;
    padding: 0 20px;
    border-bottom: 1px solid #ddd;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
}

nav {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    justify-content: flex-start;
    padding: 15px 0;
}

nav a {
    color: #555;
    text-decoration: none;
    padding: 10px 15px;
    font-weight: 500;
    transition: color 0.2s, border-bottom 0.2s;
    border-bottom: 2px solid transparent;
}

nav a:hover, nav a.active {
    color: #007bff;
    border-bottom: 2px solid #007bff;
}

main {
    padding: 20px;
    max-width: 900px;
    margin: 20px auto;
}

.hero {
    text-align: center;
    padding: 40px 20px;
    background: linear-gradient(135deg, #6dd5ed, #2193b0);
    color: white;
    border-radius: 12px;
    margin-bottom: 30px;
}

.hero h1 {
    margin: 0;
    font-size: 2.5em;
}

.hero .subtitle {
    font-size: 1.2em;
    opacity: 0.9;
}

.generator-section {
    text-align: center;
}

.container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
    margin-bottom: 30px;
}

.card {
    background: white;
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    text-align: center;
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.12);
}

.set-title {
    margin-bottom: 15px;
    font-size: 1.1em;
    font-weight: 600;
    color: #555;
}

.ball {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    width: 48px;
    height: 48px;
    margin: 5px;
    border-radius: 50%;
    font-weight: bold;
    font-size: 1.1em;
    color: white;
    box-shadow: inset 0 -3px 4px rgba(0,0,0,0.2);
}

button {
    margin-bottom: 30px;
    padding: 15px 40px;
    font-size: 1.2em;
    font-weight: 600;
    border: none;
    border-radius: 30px;
    cursor: pointer;
    background: linear-gradient(45deg, #007bff, #0056b3);
    color: white;
    box-shadow: 0 4px 10px rgba(0, 123, 255, 0.4);
    transition: transform 0.2s, box-shadow 0.2s;
}

button:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 15px rgba(0, 123, 255, 0.5);
}

.content-section {
    background: white;
    border-radius: 12px;
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

.content-section h2 {
    border-bottom: 2px solid #eee;
    padding-bottom: 10px;
    margin-top: 0;
    color: #0056b3;
}

.content-section ul {
    padding-left: 20px;
}

.content-page {
    background: white;
    padding: 30px;
    border-radius: 12px;
}

.contact-info {
    margin: 20px 0;
    font-size: 1.1em;
}

.faq-item {
    margin-bottom: 20px;
}

.faq-item h3 {
    color: #0056b3;
}

footer {
    margin-top: 40px;
    padding: 30px 20px;
    text-align: center;
    font-size: 0.9em;
    color: #888;
    border-top: 1px solid #eee;
}

footer a {
    color: #555;
    text-decoration: none;
    margin: 0 10px;
}

footer a:hover {
    text-decoration: underline;
}

.notice {
    font-size: 0.8em;
    color: #aaa;
    margin-top: 15px;
}

@media (max-width: 600px) {
    .hero h1 {
        font-size: 2em;
    }
    .ball {
        width: 40px;
        height: 40px;
        font-size: 1em;
    }
}