* {
            box-sizing: border-box;
        }

        body {
            margin: 0;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
            background: #f5f7fb;
            color: #222;
        }

        .container {
            max-width: 520px;
            margin: 0 auto;
            padding: 32px 16px 48px;
        }

        h1 {
            margin: 0 0 8px;
            font-size: 28px;
            color: #222;
            text-align: center;
        }

        h2 {
            margin: 0 0 14px;
            font-size: 20px;
            color: #222;
        }

        p {
            color: #222;
            line-height: 1.7;
        }

        .lead {
            margin: 0 0 24px;
            color: #555;
            font-size: 15px;
            text-align: center;
        }

        .panel {
            background: #fff;
            border: 1px solid #e3e7ee;
            border-radius: 16px;
            padding: 20px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
            margin-bottom: 20px;
        }

        label {
            display: block;
            font-weight: 700;
            margin: 0 0 8px;
        }

        input {
            width: 100%;
            padding: 12px;
            border: 1px solid #cfd8e6;
            border-radius: 10px;
            font-size: 16px;
            background: #fff;
            color: #222;
            margin-bottom: 14px;
        }

        .button {
            display: inline-block;
            width: 100%;
            border: none;
            border-radius: 10px;
            padding: 12px 16px;
            background: #2563eb;
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            cursor: pointer;
            text-align: center;
            text-decoration: none;
            margin-top: 6px;
        }

        .button.secondary {
            background: #6b7280;
        }

        .message {
            padding: 12px 14px;
            border-radius: 10px;
            margin-bottom: 16px;
            background: #eef7ee;
            color: #166534;
        }

        .error {
            padding: 12px 14px;
            border-radius: 10px;
            margin-bottom: 16px;
            background: #fff1f2;
            color: #be123c;
        }

        .back {
            display: inline-block;
            margin-top: 12px;
            color: #2563eb;
            text-decoration: none;
        }

        .note {
            color: #666;
            font-size: 14px;
            margin-top: 14px;
        }

        .user-name {
            font-weight: 800;
            font-size: 22px;
            margin-bottom: 4px;
        }

        .user-meta {
            color: #666;
            font-size: 14px;
            margin-bottom: 16px;
        }