:root {
            --pastel-yellow: #fff9e6;
            --pastel-purple: #f3ebff;
            --accent-yellow: #ffd966;
            --accent-purple: #c4a3e8;
            --deep-purple: #7c5ba6;
        }

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: linear-gradient(135deg, var(--pastel-yellow) 0%, var(--pastel-purple) 100%);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        /* Navbar */
        .navbar {
            background: linear-gradient(135deg, var(--pastel-yellow) 0%, var(--pastel-purple) 100%);
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }

        .navbar-brand {
            font-size: 1.8rem;
            font-weight: bold;
            color: var(--deep-purple) !important;
        }

        .nav-link {
            color: #555 !important;
            font-weight: 500;
            transition: color 0.3s;
        }

        .nav-link:hover {
            color: var(--deep-purple) !important;
        }

        /* Main Container */
        .main-container {
            flex: 1;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 3rem 1rem;
        }

        /* Login Card */
        .login-card {
            background: white;
            border-radius: 20px;
            box-shadow: 0 10px 40px rgba(124, 91, 166, 0.2);
            overflow: hidden;
            max-width: 500px;
            width: 100%;
            animation: fadeInUp 0.6s ease;
        }

        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .login-header {
            background: linear-gradient(135deg, var(--accent-yellow) 0%, var(--accent-purple) 100%);
            padding: 3rem 2rem;
            text-align: center;
            color: white;
        }

        .login-header h1 {
            font-size: 2rem;
            font-weight: bold;
            margin-bottom: 0.5rem;
        }

        .login-header p {
            margin: 0;
            opacity: 0.95;
        }

        .login-body {
            padding: 2.5rem;
        }

        .form-label {
            color: var(--deep-purple);
            font-weight: 600;
            margin-bottom: 0.5rem;
        }

        .form-control {
            border: 2px solid #e8dff5;
            border-radius: 10px;
            padding: 0.8rem 1rem;
            transition: border-color 0.3s;
        }

        .form-control:focus {
            border-color: var(--accent-purple);
            box-shadow: 0 0 0 0.2rem rgba(196, 163, 232, 0.25);
        }

        .input-group-text {
            background: linear-gradient(135deg, var(--pastel-yellow) 0%, var(--pastel-purple) 100%);
            border: 2px solid #e8dff5;
            border-right: none;
            color: var(--deep-purple);
        }

        .input-group .form-control {
            border-left: none;
        }

        .input-group:focus-within .input-group-text {
            border-color: var(--accent-purple);
        }

        .input-group:focus-within .form-control {
            border-left: 2px solid var(--accent-purple);
        }

        .btn-login {
            width: 100%;
            padding: 0.9rem;
            background: linear-gradient(135deg, var(--accent-yellow) 0%, var(--accent-purple) 100%);
            color: white;
            border: none;
            border-radius: 50px;
            font-weight: bold;
            font-size: 1.1rem;
            transition: transform 0.3s, box-shadow 0.3s;
            box-shadow: 0 4px 15px rgba(124, 91, 166, 0.3);
        }

        .btn-login:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(124, 91, 166, 0.4);
            color: white;
        }

        .alert-custom {
            background: linear-gradient(135deg, #ffe6e6 0%, #ffe6f5 100%);
            border: 2px solid #ffb3b3;
            border-radius: 10px;
            color: #cc0000;
            padding: 1rem;
            margin-bottom: 1.5rem;
        }

        .divider {
            text-align: center;
            margin: 1.5rem 0;
            position: relative;
        }

        .divider::before {
            content: "";
            position: absolute;
            top: 50%;
            left: 0;
            right: 0;
            height: 1px;
            background: #e8dff5;
        }

        .divider span {
            background: white;
            padding: 0 1rem;
            position: relative;
            color: #999;
            font-size: 0.9rem;
        }

        .signup-link {
            text-align: center;
            margin-top: 1.5rem;
            padding-top: 1.5rem;
            border-top: 1px solid #e8dff5;
        }

        .signup-link a {
            color: var(--deep-purple);
            text-decoration: none;
            font-weight: 600;
            transition: color 0.3s;
        }

        .signup-link a:hover {
            color: var(--accent-purple);
        }

        /* Brand Icon */
        .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 60px;
            height: 60px;
            background: white;
            border-radius: 15px;
            margin-bottom: 1rem;
        }

        .brand-icon i {
            font-size: 2rem;
            color: var(--deep-purple);
        }