* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: Arial, sans-serif; background: #f0f2f5; color: #333; }

header {
    background: #2c3e50;
    color: #fff;
    padding: 14px 30px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
header h1 { font-size: 1.3rem; }
header nav a { color: #ccc; text-decoration: none; margin-left: 18px; font-size: 0.9rem; }
header nav a:hover { color: #fff; }

.container { max-width: 520px; margin: 60px auto; background: #fff; padding: 36px; border-radius: 8px; box-shadow: 0 2px 12px rgba(0,0,0,.1); }

h2 { margin-bottom: 24px; font-size: 1.4rem; }

label { display: block; margin-bottom: 6px; font-size: 0.85rem; font-weight: bold; }
input[type=text], input[type=password], input[type=email] {
    width: 100%; padding: 10px 12px; border: 1px solid #ccc;
    border-radius: 4px; margin-bottom: 18px; font-size: 0.95rem;
}
button, .btn {
    display: inline-block; background: #2c3e50; color: #fff;
    border: none; padding: 10px 24px; border-radius: 4px;
    cursor: pointer; font-size: 0.95rem; text-decoration: none;
}
button:hover, .btn:hover { background: #1a252f; }

.alert-error   { background: #fdecea; border-left: 4px solid #e74c3c; padding: 12px; margin-bottom: 18px; border-radius: 4px; }
.alert-success { background: #eafaf1; border-left: 4px solid #27ae60; padding: 12px; margin-bottom: 18px; border-radius: 4px; }

.wide { max-width: 820px; }
table { width: 100%; border-collapse: collapse; margin-top: 16px; }
th, td { padding: 10px 14px; border: 1px solid #ddd; text-align: left; font-size: 0.9rem; }
th { background: #f8f8f8; }

.vuln-box {
    background: #fff8e1; border-left: 4px solid #f39c12;
    padding: 12px 16px; margin-top: 24px; border-radius: 4px;
    font-size: 0.82rem; line-height: 1.6;
}
.vuln-box strong { display: block; margin-bottom: 4px; color: #d35400; }