* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #1f2937;
}

.wrap {
    width: min(980px, 92vw);
    margin: 0 auto;
}

.topbar {
    background: #0f172a;
    color: #fff;
    padding: 14px 0;
    margin-bottom: 24px;
}

.brand {
    font-weight: 700;
    color: #fff;
    text-decoration: none;
    margin-right: 16px;
}

nav a {
    color: #dbeafe;
    text-decoration: none;
    margin-right: 14px;
    font-size: 14px;
}

.card {
    background: #fff;
    border: 1px solid #e5e7eb;
    border-radius: 10px;
    padding: 18px;
    margin-bottom: 16px;
}

h1, h2, h3 {
    margin-top: 0;
}

input, textarea, button {
    width: 100%;
    padding: 10px;
    margin: 6px 0 12px;
    border-radius: 8px;
    border: 1px solid #d1d5db;
    font: inherit;
}

button {
    background: #1d4ed8;
    color: #fff;
    border: none;
    cursor: pointer;
}

.muted {
    color: #6b7280;
    font-size: 14px;
}

.msg {
    padding: 10px;
    border-radius: 8px;
    margin-bottom: 12px;
}

.msg.success {
    background: #dcfce7;
    color: #166534;
}

.msg.error {
    background: #fee2e2;
    color: #991b1b;
}

.footer {
    padding: 30px 0;
    color: #6b7280;
    font-size: 14px;
}