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

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: #f5f7fa;
    color: #1f2937;
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 800px;
    margin: 80px auto;
    padding: 0 24px;
    text-align: center;
}

h1 {
    font-size: 2.4rem;
    margin-bottom: 16px;
    color: #111827;
}

p {
    font-size: 1.1rem;
    color: #4b5563;
    margin-bottom: 24px;
}

.btn {
    display: inline-block;
    padding: 12px 24px;
    background: #2563eb;
    color: white;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 500;
    transition: background 0.2s, transform 0.1s;
}

.btn:hover {
    background: #1d4ed8;
    transform: translateY(-1px);
}

.site-footer {
    margin-top: auto;
    padding: 24px;
    text-align: center;
    color: #6b7280;
    font-size: 0.9rem;
    border-top: 1px solid #e5e7eb;
}