:root {
            --glass-bg: rgba(100, 100, 100, 0.25);
            --glass-border: rgba(100, 100, 100, 0.25);
            --accent-color: #00d2ff;
        }
        body {
            margin: 0;
            height: 100vh;
            background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)),

                        url("/static/images/bg.jpeg") no-repeat center center fixed;

            background-size: cover;
            font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
        }
        .login-card {
            width: 100%;
            max-width: 420px;
            padding: 40px;
            border-radius: 24px;
            background: var(--glass-bg);
            backdrop-filter: blur(15px);
            -webkit-backdrop-filter: blur(15px);
            border: 1px solid var(--glass-border);
            box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
            color: white;
            transition: transform 0.3s ease;
        }

        .logo-container {
            text-align: center;
            margin-bottom: 30px;
        }

        .logo-container img {
            width: 120px;
            filter: drop-shadow(0 0 8px rgba(255,255,255,0.2));
        }

        h3 {
            font-weight: 700;
            font-size: 1.5rem;
            letter-spacing: -0.5px;
            margin-bottom: 30px;
            text-align: center;
        }

        .form-label {
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 8px;
            color: rgba(255,255,255,0.8);
            display: block;
        }
        .input-wrapper {
            position: relative;
            margin-bottom: 20px;
        }
        .form-control {
            background: white;
            border: 1px solid var(--glass-border);
            border-radius: 12px;
            padding: 12px 16px;
            color: #1a1a1a !important;
            transition: all 0.2s;
        }

        .form-control:focus {
            background: #ffffff;
            border-color: var(--accent-color);
            box-shadow: 0 0 0 4px rgba(0, 210, 255, 0.25);
            color: #000000 !important;
            outline: none;
        }

        .form-control::placeholder {
            color: lightslategray;
        }

        .pass-toggle {
            position: absolute;
            right: 15px;
            top: 50%;
            transform: translateY(-50%);
            cursor: pointer;
            color: #444444;
            z-index: 10;
        }

        .btn-submit {
            width: 100%;
            padding: 12px;
            border-radius: 12px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 1px;
            border: none;
            background: linear-gradient(135deg, #00d2ff 0%, #3a7bd5 100%);
            color: white;
            margin-top: 10px;
            box-shadow: 0 4px 15px rgba(0, 210, 255, 0.3);
            transition: all 0.3s;
        }
        .btn-submit:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(0, 210, 255, 0.4);
            filter: brightness(1.1);
        }
        .btn-submit:active {
            transform: translateY(0);
        }
        #msg .alert {
            position: relative;
            z-index: 999; 
            background: #ff4757 !important; 
            border: none;
            color: #ffffff !important; 
            border-radius: 12px;
            font-size: 1rem;
            font-weight: 700;
            text-align: center;
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
            margin-bottom: 25px;
            padding: 15px;
            display: block;
            width: 100%;
        }
        .qr-wrapper {
            background: white;
            padding: 15px;
            border-radius: 16px;
            display: inline-block;
            margin: 20px 0;
        }
        .otp-input {
            letter-spacing: 8px;
            font-size: 1.5rem;
            text-align: center;
            font-weight: 700;
            color: #1a1a1a !important;
        }
        @keyframes shake {
            0%, 100% { transform: translateX(0); }
            20%, 60% { transform: translateX(-8px); }
            40%, 80% { transform: translateX(8px); }
        }
        .shake { animation: shake 0.4s cubic-bezier(.36,.07,.19,.97) both; }