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

body {
    font-family: 'Courier New', monospace;
    background: #0a0a0a;
    color: #e0e0e0;
    min-height: 100vh;
}

header {
    text-align: center;
    padding: 60px 20px 40px;
    border-bottom: 1px solid #222;
}

h1 {
    font-size: 2.5rem;
    font-weight: normal;
    margin-bottom: 10px;
}

.subtitle {
    color: #666;
    font-size: 0.9rem;
}

.search-container {
    margin-top: 25px;
}

#search {
    width: 100%;
    max-width: 400px;
    padding: 12px 20px;
    font-size: 16px;
    font-family: 'Courier New', monospace;
    background: #111;
    border: 1px solid #333;
    color: #fff;
    border-radius: 4px;
}

#search:focus {
    outline: none;
    border-color: #555;
}

#search-result {
    margin-top: 15px;
    min-height: 24px;
    color: #888;
}

.back-link {
    display: inline-block;
    margin-bottom: 20px;
    color: #4a9eff;
    text-decoration: none;
}

.back-link:hover {
    text-decoration: underline;
}

.content {
    max-width: 800px;
    margin: 0 auto;
    padding: 40px 20px;
}

.octet-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    gap: 8px;
}

.octet-link {
    display: block;
    padding: 15px 10px;
    background: #111;
    border: 1px solid #222;
    color: #888;
    text-decoration: none;
    text-align: center;
    border-radius: 4px;
    transition: all 0.15s;
}

.octet-link:hover {
    background: #1a1a1a;
    border-color: #444;
    color: #fff;
}

.group {
    border-bottom: 1px solid #1a1a1a;
}

.group-header {
    color: #666;
    font-size: 0.85rem;
    padding: 15px 0;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    user-select: none;
}

.group-header:hover {
    color: #999;
}

.group-header .arrow {
    transition: transform 0.2s;
    color: #444;
}

.group-header.open .arrow {
    transform: rotate(90deg);
}

.group-content {
    display: none;
    padding-bottom: 15px;
}

.group-content.open {
    display: block;
}

.dim {
    color: #444;
}

.ip {
    padding: 4px 0;
    color: #555;
    font-size: 0.9rem;
}

.ip:hover {
    color: #fff;
}

.ip.highlight {
    color: #4a9eff;
    background: #0d1f35;
    margin: 0 -10px;
    padding: 4px 10px;
}

.load-more-ips {
    padding: 10px 0;
}

.load-more-ips button {
    background: none;
    border: 1px solid #333;
    color: #666;
    padding: 8px 16px;
    font-family: 'Courier New', monospace;
    font-size: 0.8rem;
    cursor: pointer;
    border-radius: 4px;
}

.load-more-ips button:hover {
    background: #1a1a1a;
    color: #999;
}

.page-title {
    font-size: 1.5rem;
    margin-bottom: 30px;
    color: #888;
}

footer {
    text-align: center;
    padding: 40px;
    color: #333;
    font-size: 0.8rem;
}

footer a {
    color: #444;
}