:root {
            --bg-color: #f4f7fa;
            --card-bg: #ffffff;
            --primary: #1f3a5f;   /* deep finance blue */
            --accent: #2fa46f;   /* muted green */
            --text-dark: #2c2c2c;
            --text-muted: #7a869a;
            --border: #e1e6ee;
        }

        * {
            box-sizing: border-box;
            font-family: "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
        }

        body {
            margin: 0;
            min-height: 100vh;
            background: linear-gradient(135deg, #eef2f7, #f9fbfd);
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
        }

        .login-wrapper {
            width: 100%;
            max-width: 420px;
            padding: 20px;
        }

        .brand {
            text-align: center;
            font-size: 28px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 20px;
            letter-spacing: 0.5px;
        }

        .login-card {
            background: var(--card-bg);
            border-radius: 10px;
            padding: 30px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
            border: 1px solid var(--border);
        }

        .login-card h2 {
            margin: 0 0 25px;
            color: var(--text-dark);
            font-size: 20px;
            font-weight: 600;
            text-align: center;
        }

        .form-group {
            margin-bottom: 18px;
        }

        label {
            display: block;
            margin-bottom: 6px;
            font-size: 13px;
            color: var(--text-muted);
            font-weight: 600;
        }

        input[type="text"],
        input[type="password"] {
            width: 100%;
            padding: 11px 12px;
            border-radius: 6px;
            border: 1px solid var(--border);
            font-size: 14px;
            transition: border-color 0.2s, box-shadow 0.2s;
        }

        input:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 2px rgba(31, 58, 95, 0.12);
        }

        .checkbox-row {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 22px;
        }

        .checkbox-row input {
            accent-color: var(--accent);
        }

        button {
            width: 100%;
            padding: 12px;
            border-radius: 6px;
            border: none;
            background: linear-gradient(135deg, var(--primary), #264d7e);
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: transform 0.1s ease, box-shadow 0.1s ease;
        }

        button:hover {
            box-shadow: 0 6px 18px rgba(31, 58, 95, 0.25);
            transform: translateY(-1px);
        }

        .footer-text {
            text-align: center;
            margin-top: 18px;
            font-size: 12px;
            color: var(--text-muted);
        }

        .box { max-width: 520px; padding: 16px; border: 1px solid #ddd; border-radius: 10px; }
        .err { background:#ffe8e8; border:1px solid #ffb3b3; padding:10px; border-radius:8px; margin-bottom:12px; }
        .ok  { background:#e8ffe8; border:1px solid #b3ffb3; padding:10px; border-radius:8px; margin-bottom:12px; }