* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Plus Jakarta Sans', sans-serif;
            background: #0b1219;  /* deepest base */
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            overflow: hidden;
        }

        /* sophisticated animated background with workshop vibe */
        .orb-bg {
            position: fixed;
            width: 100%;
            height: 100%;
            top: 0;
            left: 0;
            z-index: 0;
            background: radial-gradient(circle at 20% 30%, rgba(0, 180, 255, 0.08) 0%, transparent 30%),
                        radial-gradient(circle at 90% 70%, rgba(255, 215, 0, 0.06) 0%, transparent 35%),
                        linear-gradient(145deg, #0a111a 0%, #14222e 100%);
        }

        .mesh-grid {
            position: fixed;
            width: 100%;
            height: 100%;
            background-image: 
                linear-gradient(rgba(0, 255, 255, 0.02) 1px, transparent 1px),
                linear-gradient(90deg, rgba(0, 255, 255, 0.02) 1px, transparent 1px);
            background-size: 50px 50px;
            z-index: 1;
            pointer-events: none;
            animation: drift 24s linear infinite;
        }

        @keyframes drift {
            0% { transform: translate(0, 0); }
            100% { transform: translate(20px, 20px); }
        }

        .glow-spot {
            position: fixed;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(0, 150, 255, 0.15) 0%, transparent 70%);
            top: -200px;
            right: -200px;
            border-radius: 50%;
            filter: blur(70px);
            z-index: 1;
            animation: pulseGlow 10s alternate infinite;
        }

        .glow-spot2 {
            left: -200px;
            bottom: -200px;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(255, 200, 0, 0.12) 0%, transparent 70%);
            filter: blur(80px);
            position: fixed;
            border-radius: 50%;
            z-index: 1;
            animation: pulseGlow2 15s alternate infinite;
        }

        @keyframes pulseGlow {
            0% { opacity: 0.5; transform: scale(1); }
            100% { opacity: 1; transform: scale(1.2); }
        }

        @keyframes pulseGlow2 {
            0% { opacity: 0.4; transform: scale(1); }
            100% { opacity: 0.9; transform: scale(1.3); }
        }

        /* main card — modern glassmorphism + industrial accents */
        .login-container {
            position: relative;
            z-index: 20;
            width: 100%;
            max-width: 440px;
            margin: 1.5rem;
        }

        .login-card {
            background: rgba(18, 28, 40, 0.75);
            backdrop-filter: blur(16px) saturate(180%);
            -webkit-backdrop-filter: blur(16px) saturate(180%);
            border-radius: 42px;
            padding: 2.5rem 2rem;
            border: 1px solid rgba(0, 191, 255, 0.25);
            box-shadow: 0 40px 70px rgba(0, 0, 0, 0.7), 0 0 0 1px rgba(0, 212, 255, 0.1) inset, 0 0 30px rgba(0, 160, 255, 0.3);
            transition: transform 0.25s ease, box-shadow 0.3s;
        }

        .login-card:hover {
            box-shadow: 0 50px 90px rgba(0, 40, 80, 0.9), 0 0 0 1.5px rgba(0, 191, 255, 0.3) inset;
            transform: translateY(-3px);
        }

        /* header with automotive touch */
        .brand-header {
            text-align: center;
            margin-bottom: 2rem;
        }

        .brand-icon {
            background: linear-gradient(145deg, #1e3b4f, #0f2636);
            width: 80px;
            height: 80px;
            border-radius: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1.2rem;
            border: 2px solid rgba(0, 199, 255, 0.5);
            box-shadow: 0 10px 20px rgba(0, 30, 50, 0.7), 0 0 20px #00a6ff4d;
        }

        .brand-icon i {
            font-size: 3rem;
            background: linear-gradient(145deg, #b0e0ff, #5dc9ff);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            filter: drop-shadow(0 0 5px #0099ff);
        }

        .brand-header h1 {
            font-weight: 700;
            font-size: 2.5rem;
            letter-spacing: -0.5px;
            background: linear-gradient(to right, #ffffff, #c4e2ff, #9dd0ff);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            margin-bottom: 0.3rem;
            text-shadow: 0 2px 10px rgba(0,160,255,0.4);
        }

        .brand-header .sub {
            color: #a0c9f0;
            font-weight: 400;
            font-size: 1rem;
            background: rgba(0, 150, 255, 0.15);
            display: inline-block;
            padding: 0.4rem 1.6rem;
            border-radius: 60px;
            backdrop-filter: blur(2px);
            border: 1px solid rgba(0, 191, 255, 0.2);
            margin-top: 0.4rem;
        }

        /* form elements */
        .input-group-modern {
            margin-bottom: 1.5rem;
        }

        .input-label {
            display: flex;
            align-items: center;
            gap: 8px;
            color: #b4dcff;
            font-weight: 500;
            font-size: 0.9rem;
            margin-bottom: 0.5rem;
            letter-spacing: 0.02rem;
        }

        .input-label i {
            color: #3fa2ff;
            font-size: 1rem;
            width: 20px;
            text-align: center;
        }

        .input-field {
            width: 100%;
            background: rgba(10, 25, 40, 0.7);
            border: 1.5px solid rgba(0, 174, 255, 0.3);
            border-radius: 26px;
            padding: 0.9rem 1.5rem;
            font-size: 1rem;
            color: #ffffff;
            font-weight: 400;
            transition: all 0.25s ease;
            outline: none;
            box-shadow: 0 5px 12px rgba(0,0,0,0.4);
            font-family: 'Plus Jakarta Sans', sans-serif;
        }

        .input-field:focus {
            border-color: #00ccff;
            box-shadow: 0 0 0 4px rgba(0, 180, 255, 0.2), 0 8px 18px #0000004d;
            background: rgba(10, 30, 48, 0.9);
        }

        .input-field::placeholder {
            color: rgba(170, 210, 255, 0.45);
            font-weight: 300;
            font-size: 0.95rem;
        }

        /* remember + demo row */
        .flex-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin: 1.5rem 0 2rem;
            flex-wrap: wrap;
            gap: 12px;
        }

        .checkbox-custom {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            color: #b1d4f5;
            font-weight: 400;
            cursor: pointer;
        }

        .checkbox-custom input[type="checkbox"] {
            appearance: none;
            width: 20px;
            height: 20px;
            background: rgba(0, 30, 50, 0.8);
            border: 2px solid #2f8dff;
            border-radius: 7px;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: 0.1s;
        }

        .checkbox-custom input[type="checkbox"]:checked {
            background: #0a7eff;
            border-color: #9cd1ff;
            box-shadow: 0 0 12px #00a3ff;
            position: relative;
        }

        .checkbox-custom input[type="checkbox"]:checked::after {
            content: "\f00c";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            font-size: 12px;
            color: white;
        }

        .demo-btn {
            background: rgba(0, 145, 255, 0.18);
            border: 1px solid rgba(0, 191, 255, 0.5);
            color: #b3e0ff;
            border-radius: 34px;
            padding: 0.5rem 1.6rem;
            font-weight: 500;
            font-size: 0.9rem;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            cursor: pointer;
            transition: 0.2s;
            backdrop-filter: blur(4px);
            box-shadow: 0 5px 12px rgba(0,0,0,0.2);
            font-family: 'Plus Jakarta Sans', sans-serif;
        }

        .demo-btn:hover {
            background: rgba(0, 170, 255, 0.3);
            border-color: #4db8ff;
            color: white;
            box-shadow: 0 0 18px #0099ff66;
            transform: scale(1.02);
        }

        /* primary login button */
        .login-btn {
            background: linear-gradient(135deg, #0074d9, #0099ff);
            border: none;
            border-radius: 60px;
            padding: 1rem 1.8rem;
            font-weight: 700;
            font-size: 1.1rem;
            letter-spacing: 0.5px;
            color: white;
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 12px;
            cursor: pointer;
            border: 1px solid rgba(255,255,255,0.2);
            box-shadow: 0 20px 30px -8px #001c40, 0 0 0 1px #00b0f0 inset;
            transition: all 0.3s ease;
            text-transform: uppercase;
            font-family: 'Plus Jakarta Sans', sans-serif;
        }

        .login-btn i {
            font-size: 1.2rem;
            transition: transform 0.2s;
        }

        .login-btn:hover {
            background: linear-gradient(135deg, #0088ee, #1eaaff);
            box-shadow: 0 28px 36px -10px #002856, 0 0 0 2px #6fcbff inset;
            transform: scale(1.01);
        }

        .login-btn:hover i {
            transform: translateX(5px);
        }

        .login-btn:active {
            transform: scale(0.98);
        }

        /* alert message */
        .alert-modern {
            margin-top: 1.8rem;
            padding: 1rem 1.4rem;
            border-radius: 30px;
            background: rgba(200, 30, 40, 0.18);
            backdrop-filter: blur(8px);
            border-left: 6px solid #ff4d6d;
            color: #ffb3b3;
            display: flex;
            align-items: center;
            gap: 14px;
            font-weight: 450;
            border: 1px solid rgba(255, 80, 100, 0.4);
            box-shadow: 0 6px 14px #25000033;
            animation: shake 0.3s ease;
        }

        @keyframes shake {
            0%,100% { transform: translateX(0); }
            25% { transform: translateX(-5px); }
            75% { transform: translateX(5px); }
        }

        .alert-modern i {
            font-size: 1.3rem;
            color: #ff6b7b;
        }

        /* loading overlay refined */
        .loading-screen {
            position: fixed;
            inset: 0;
            background: #0a111c;
            z-index: 9999;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: opacity 0.6s, visibility 0.6s;
            pointer-events: none;
        }
        .loading-content {
            text-align: center;
            color: white;
            max-width: 340px;
        }
        .car-animate {
            font-size: 4rem;
            filter: drop-shadow(0 0 20px #00b7ff);
            animation: float 2.6s infinite alternate;
        }
        .wrench-icon {
            font-size: 2.2rem;
            color: #ffd966;
            display: inline-block;
            margin: 0 8px;
            animation: spin 6s linear infinite;
        }
        @keyframes float {
            0% { transform: translateY(0px); }
            100% { transform: translateY(-16px); }
        }
        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }
        .progress-thin {
            width: 200px;
            height: 4px;
            background: #1f3a4e;
            margin: 20px auto;
            border-radius: 10px;
            overflow: hidden;
        }
        .progress-fill {
            height: 4px;
            background: linear-gradient(90deg, #2aa0ff, #b0e0ff);
            width: 100%;
            animation: load 2.2s ease-out forwards;
        }
        @keyframes load {
            0% { width: 0%; }
            100% { width: 100%; }
        }

        .fade-out {
            opacity: 0;
            visibility: hidden;
        }

        /* tiny footer */
        .footer-note {
            text-align: center;
            margin-top: 1.2rem;
            color: #6b93b0;
            font-size: 0.8rem;
            font-weight: 300;
        }

        /* Responsive adjustments */
        @media (max-width: 768px) {
            .login-container {
                max-width: 100%;
                margin: 1rem;
            }

            .login-card {
                border-radius: 32px;
                padding: 2rem 1.5rem;
                max-width: 100%;
            }

            .brand-header {
                margin-bottom: 1.5rem;
            }

            .brand-header h1 {
                font-size: 2.2rem;
                margin-bottom: 0.2rem;
            }

            .brand-icon {
                width: 70px;
                height: 70px;
                margin-bottom: 1rem;
            }

            .brand-icon i {
                font-size: 2.5rem;
            }

            .brand-header .sub {
                font-size: 0.9rem;
                padding: 0.35rem 1.4rem;
            }

            .input-group-modern {
                margin-bottom: 1.2rem;
            }

            .input-label {
                font-size: 0.85rem;
                margin-bottom: 0.4rem;
                gap: 6px;
            }

            .input-field {
                padding: 0.85rem 1.3rem;
                font-size: 0.95rem;
                border-radius: 24px;
            }

            .flex-row {
                margin: 1.2rem 0 1.8rem;
                gap: 10px;
            }

            .checkbox-custom {
                font-size: 0.9rem;
                gap: 0.5rem;
            }

            .checkbox-custom input[type="checkbox"] {
                width: 18px;
                height: 18px;
            }

            .demo-btn {
                padding: 0.5rem 1.4rem;
                font-size: 0.85rem;
                gap: 6px;
            }

            .demo-btn i {
                font-size: 0.9rem;
            }

            .login-btn {
                padding: 0.95rem 1.6rem;
                font-size: 1rem;
                gap: 10px;
            }

            .login-btn i {
                font-size: 1.1rem;
            }

            .alert-modern {
                margin-top: 1.5rem;
                padding: 0.9rem 1.2rem;
                gap: 12px;
                font-size: 0.9rem;
            }

            .alert-modern i {
                font-size: 1.1rem;
            }

            .footer-note {
                font-size: 0.75rem;
                margin-top: 1rem;
            }
        }

        @media (max-width: 576px) {
            .login-container {
                max-width: 100%;
                margin: 0.75rem;
            }

            .login-card {
                border-radius: 28px;
                padding: 1.8rem 1.2rem;
                box-shadow: 0 30px 50px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(0, 212, 255, 0.1) inset, 0 0 20px rgba(0, 160, 255, 0.2);
            }

            .brand-header {
                margin-bottom: 1.3rem;
            }

            .brand-icon {
                width: 65px;
                height: 65px;
                margin-bottom: 0.9rem;
                border-radius: 24px;
            }

            .brand-icon i {
                font-size: 2.3rem;
            }

            .brand-header h1 {
                font-size: 1.9rem;
                margin-bottom: 0.2rem;
            }

            .brand-header .sub {
                font-size: 0.8rem;
                padding: 0.3rem 1.2rem;
                margin-top: 0.3rem;
            }

            .input-group-modern {
                margin-bottom: 1rem;
            }

            .input-label {
                font-size: 0.8rem;
                margin-bottom: 0.3rem;
                gap: 5px;
            }

            .input-label i {
                font-size: 0.9rem;
                width: 18px;
            }

            .input-field {
                padding: 0.8rem 1.2rem;
                font-size: 0.9rem;
                border-radius: 22px;
                border: 1.5px solid rgba(0, 174, 255, 0.3);
            }

            .input-field:focus {
                box-shadow: 0 0 0 3px rgba(0, 180, 255, 0.15), 0 6px 14px #0000003d;
            }

            .flex-row {
                margin: 1rem 0 1.5rem;
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }

            .checkbox-custom {
                font-size: 0.85rem;
                gap: 0.5rem;
            }

            .checkbox-custom input[type="checkbox"] {
                width: 18px;
                height: 18px;
                flex-shrink: 0;
            }

            .demo-btn {
                align-self: flex-end;
                padding: 0.45rem 1.2rem;
                font-size: 0.8rem;
                gap: 5px;
            }

            .demo-btn i {
                font-size: 0.85rem;
            }

            .login-btn {
                padding: 0.9rem 1.4rem;
                font-size: 0.95rem;
                gap: 10px;
                border-radius: 54px;
            }

            .login-btn span {
                font-size: 0.9rem;
                letter-spacing: 0.3px;
            }

            .login-btn i {
                font-size: 1rem;
            }

            .login-btn:hover i {
                transform: translateX(3px);
            }

            .alert-modern {
                margin-top: 1.2rem;
                padding: 0.8rem 1rem;
                gap: 10px;
                font-size: 0.85rem;
                border-left: 5px solid #ff4d6d;
            }

            .alert-modern i {
                font-size: 1rem;
                flex-shrink: 0;
            }

            .footer-note {
                font-size: 0.7rem;
                margin-top: 0.9rem;
            }

            .loading-content {
                max-width: 280px;
            }

            .car-animate {
                font-size: 3.5rem;
            }

            .wrench-icon {
                font-size: 2rem;
                margin: 0 6px;
            }

            .progress-thin {
                width: 160px;
            }
        }

        @media (max-width: 420px) {
            .login-container {
                margin: 0.5rem;
            }

            .login-card {
                border-radius: 24px;
                padding: 1.6rem 1rem;
            }

            .brand-icon {
                width: 60px;
                height: 60px;
                margin-bottom: 0.8rem;
            }

            .brand-icon i {
                font-size: 2rem;
            }

            .brand-header h1 {
                font-size: 1.7rem;
            }

            .brand-header .sub {
                font-size: 0.75rem;
                padding: 0.25rem 1rem;
            }

            .input-field {
                padding: 0.75rem 1rem;
                font-size: 0.85rem;
            }

            .input-field::placeholder {
                font-size: 0.85rem;
            }

            .flex-row {
                margin: 0.9rem 0 1.3rem;
            }

            .login-btn {
                padding: 0.85rem 1.2rem;
                font-size: 0.9rem;
                border-radius: 50px;
            }

            .login-btn span {
                font-size: 0.85rem;
                letter-spacing: 0.2px;
            }

            .demo-btn {
                padding: 0.4rem 1rem;
                font-size: 0.75rem;
            }

            .demo-btn i {
                font-size: 0.8rem;
            }

            .checkbox-custom {
                font-size: 0.8rem;
            }

            .input-label {
                font-size: 0.75rem;
            }
        }