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

        body {
            font-family: 'Poppins', sans-serif;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 20px;
            position: relative;
            overflow-x: hidden;
            overflow-y: auto;
        }

        body::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
            opacity: 0.3;
        }

        .container {
            max-width: 1200px;
            width: 100%;
            margin: 0 auto;
            position: relative;
            z-index: 1;
            display: flex;
            align-items: center;
            min-height: 100vh;
            padding: 20px 0;
        }

        .login-wrapper {
            background: white;
            border-radius: 20px;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
            overflow: hidden;
            max-width: 500px;
            width: 100%;
            margin: auto;
            animation: fadeInUp 0.6s ease;
        }

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

        .header {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 40px 30px;
            text-align: center;
            position: relative;
        }

        .header::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
            opacity: 0.5;
        }

        .logo-section {
            position: relative;
            z-index: 1;
        }

        .logo-section h1 {
            font-size: 2.5rem;
            margin-bottom: 10px;
            font-weight: 700;
            letter-spacing: 4px;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
        }

        .logo-section .welcome-text {
            font-size: 1.1rem;
            opacity: 0.95;
            font-weight: 300;
            letter-spacing: 1px;
        }

        .form-container {
            padding: 40px 40px;
        }

        .form-group {
            margin-bottom: 20px;
        }

        .form-group label {
            display: block;
            margin-bottom: 8px;
            color: #333;
            font-weight: 500;
            font-size: 0.95rem;
        }

        .form-group label .required {
            color: #e74c3c;
            margin-left: 3px;
        }

        .input-wrapper {
            position: relative;
        }

        .input-icon {
            position: absolute;
            left: 15px;
            top: 50%;
            transform: translateY(-50%);
            color: #667eea;
            font-size: 1.1rem;
        }

        .form-control {
            width: 100%;
            padding: 14px 15px 14px 45px;
            border: 2px solid #e0e0e0;
            border-radius: 10px;
            font-size: 0.95rem;
            transition: all 0.3s;
            font-family: 'Poppins', sans-serif;
        }

        .form-control:focus {
            outline: none;
            border-color: #667eea;
            box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
        }

        .password-toggle {
            position: absolute;
            right: 15px;
            top: 50%;
            transform: translateY(-50%);
            cursor: pointer;
            color: #667eea;
            font-size: 1.1rem;
        }

        .form-options {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 25px;
        }

        .remember-me {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
            color: #555;
        }

        .remember-me input[type="checkbox"] {
            width: 18px;
            height: 18px;
            cursor: pointer;
            accent-color: #667eea;
        }

        .forgot-password {
            color: #667eea;
            text-decoration: none;
            font-size: 0.9rem;
            font-weight: 500;
            transition: all 0.3s;
        }

        .forgot-password:hover {
            color: #5568d3;
            text-decoration: underline;
        }

        .btn-signin {
            width: 100%;
            padding: 15px;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            border: none;
            border-radius: 10px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
            font-family: 'Poppins', sans-serif;
            box-shadow: 0 5px 15px rgba(102, 126, 234, 0.3);
        }

        .btn-signin:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 25px rgba(102, 126, 234, 0.4);
        }

        .btn-signin:disabled {
            opacity: 0.6;
            cursor: not-allowed;
            transform: none;
        }

        .loading-spinner {
            display: inline-block;
            width: 18px;
            height: 18px;
            border: 2px solid #ffffff;
            border-radius: 50%;
            border-top-color: transparent;
            animation: spinner 0.6s linear infinite;
        }

        @keyframes spinner {
            to { transform: rotate(360deg); }
        }

        .divider-section {
            margin: 30px 0;
            position: relative;
        }

        .divider-line {
            height: 2px;
            background: linear-gradient(to right, transparent, #667eea, transparent);
            margin: 20px 0;
            position: relative;
        }

        .divider-text {
            text-align: center;
            color: #667eea;
            font-weight: 600;
            font-size: 0.9rem;
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            background: white;
            padding: 0 15px;
        }

        .signup-section {
            border: 2px dashed #667eea;
            border-radius: 15px;
            padding: 20px;
            text-align: center;
            background: linear-gradient(135deg, #f8f9ff 0%, #f0f2ff 100%);
            position: relative;
            overflow: hidden;
        }

        .signup-section::before {
            content: '📚';
            position: absolute;
            right: -10px;
            bottom: -10px;
            font-size: 80px;
            opacity: 0.08;
        }

        .signup-text {
            color: #555;
            font-size: 1rem;
            margin-bottom: 15px;
            position: relative;
            z-index: 1;
        }

        .btn-signup {
            display: inline-block;
            padding: 12px 35px;
            background: white;
            color: #667eea;
            text-decoration: none;
            border-radius: 10px;
            font-weight: 600;
            font-size: 1rem;
            transition: all 0.3s;
            border: 2px solid #667eea;
            position: relative;
            z-index: 1;
        }

        .btn-signup:hover {
            background: #667eea;
            color: white;
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(102, 126, 234, 0.3);
        }

        .bangla-text {
            font-weight: 600;
            color: #667eea;
        }

        .helper-text {
            font-size: 0.85rem;
            color: #7f8c8d;
            margin-top: 5px;
            display: block;
        }

        @media (max-width: 767px) {
            body {
                padding: 15px;
            }

            .container {
                padding: 15px 0;
            }

            .logo-section h1 {
                font-size: 2rem;
                letter-spacing: 2px;
            }

            .logo-section .welcome-text {
                font-size: 1rem;
            }

            .header {
                padding: 30px 20px;
            }

            .form-container {
                padding: 30px 25px;
            }

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

            .form-options {
                flex-direction: column;
                gap: 12px;
                align-items: flex-start;
                margin-bottom: 20px;
            }

            .forgot-password {
                align-self: flex-end;
            }

            .signup-section {
                padding: 18px;
            }

            .btn-signup {
                display: block;
                text-align: center;
            }

            .divider-section {
                margin: 25px 0;
            }
        }

        @media (min-width: 768px) and (max-width: 1024px) {
            .login-wrapper {
                max-width: 550px;
            }

            .logo-section h1 {
                font-size: 2.8rem;
            }
        }

        /* Specific fix for very small screens */
        @media (max-height: 700px) {
            .header {
                padding: 25px 20px;
            }

            .logo-section h1 {
                font-size: 2rem;
            }

            .form-container {
                padding: 25px 30px;
            }

            .form-group {
                margin-bottom: 15px;
            }

            .divider-section {
                margin: 20px 0;
            }

            .signup-section {
                padding: 15px;
            }
        }