:root {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-light: #f1f5f9;
    --text-muted: #94a3b8;
    --primary-color: #3b82f6;
    --border-color: #334155;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-light);
    margin: 0;
    padding: 20px;
}

.container {
    max-width: 1000px;
    margin: auto;
}

.header {
    background-color: var(--card-bg);
    padding: 15px 25px;
    border-radius: 12px;
    margin-bottom: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border: 1px solid var(--border-color);
}

.header h1 {
    margin: 0;
    font-size: 1.5rem;
}

.header a {
    color: var(--text-light);
    text-decoration: none;
    margin-left: 15px;
    font-weight: 500;
}

.notice-box {
    padding: 15px;
    margin-bottom: 20px;
    border-radius: 8px;
    border: 1px solid var(--primary-color);
    background-color: rgba(59, 130, 246, 0.1);
    color: var(--text-light);
}

.card {
    background-color: var(--card-bg);
    padding: 20px;
    border-radius: 12px;
    margin-bottom: 15px;
    border: 1px solid var(--border-color);
}

.card h2 {
    margin-top: 0;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
    margin-bottom: 15px;
}